Leovince Cat Delete KTM 390 125 200 250 Duke

[@christianseidler2252]

The Akrapovič manual says, that the clamp of the silencer should be mounted on the inside of the holder (on the side of the wheel). I think it is because of the pressure of the bolt on the carbon fibre

[@MotoMirius]

Thanks Christian. Sadly second hand exhausts rarely come with installation manuals so that is useful information 👍 Skäl. David

[@christianseidler2252]

@@MotoMirius You can download it as PDF if you search the internet a little bit 😉✌🏻

[@MotoMirius]

Your search skills must be better than mine. I’ve double checked tonight and that clamp only fits the way I’ve got it fitted 🤔

[@christianseidler2252]

@@MotoMirius I have a 125 with the same exhaust, I will send you a message tomorrow.

[@MotoMirius]

Christian Seidler thanks. I will try it the other way round just to double check.

[@GarryGill.]

First KTM ever with two different brands of exost at once.. keep it up 👍

[@MotoMirius]

Cheers. KTM header, leovince midpipe and Akra slip on. All works! Skäl. David

[@ehrlein7841]

Moto Mirius is this combination legal?

[@Commander730]

I just have watched 3 mins of this video but already be grateful for your video series on Duke, this would bring more joy and fun using/playing the bike. Thank you. P/s: and just a little side note that it would be even greater if your voice via video recording could be clearer :D Cheers

[@MotoMirius]

Thank you for that. I am working to improve the sound recording, but it takes time to buy all of the best equipment. Skäl David

[@Thevoiceofsense]

Just bought a new 2023 duke 125 so have subbed to you. That sounded way more meatier after

[@MotoMirius]

Thanks. 2023 will probably be the under the engine exhaust, so it's a different pipe which replaces the cats instead. Often good to keep the black presilencer which sits behind the engine and then use a slip on the achieve the sound you want.

[@Thevoiceofsense]

@Moto Mirius Roger that, it should be here next week so I'll take a butchers and let you know 😉

[@tsugha]

this is not a 125 tho, it is 390 with 125 stickers

[@MotoMirius]

Indeed, but sound quality on a recording is very inaccurate with something as loud as bike, so it is the change that is the key not what you actually hear. @@tsugha

[@springy-2112]

That sits more comfortably in there Nice improvement . Peace and love David 👍🏻☮❤

[@MotoMirius]

Cheers Springy. More room for the rear shock so probably one of the best upgrades you can do on this bike. Look forward to more updates on the RT. Skäl. David

[@rafaelborges3096]

Hi! Love your videos. You recommended a piggyback fuel device in the case of a gen 2 bike. I have a gen 1 and I am considering doing the cat delete myself. Do you think such a device would be critical in the case of a gen 1 ktm duke 390 (2014-2016)?

[@MotoMirius]

Gen 1 bikes can also use a piggyback but also can have the stock ECU reflashed. Gen 1 is probably OK without the piggyback because it does not meet such strict emissions standards but to be safe, it's a good idea to fit a basic unit.

[@tinks43]

A bit of a struggle but nothing impossible. Great demo & they’ll definitely hear you coming now 👍🏻

[@MotoMirius]

I think I need you to drop by so I can just film you doing the work. Thanks Dave. Skäl. David

[@tinks43]

Moto Mirius if only I had the time 😢

[@Commander730]

11:00 I once struggled with the silencer removal for my Duke 250 MY2016 as well. Fortunately, my colleague found out that you have to press the rear shock absorber in order to make more clearance between the swing arm and the silencer itself, while another hold the thing from gradually loosing down :D Not sure if the new Duke is the same.

[@MotoMirius]

New Duke has more room because the cat is not inside. This one is hard to remove because the brackets collapse onto the spacer when it is installed - once it is off, this can be ground done to eliminate the problem. All good fun! Skäl David

[@MrgnUTube]

16:14 You saved my night :)

[@MotoMirius]

Glad that was useful! Skäl. David

[@fritertostepop4500]

Great video! Jut a quick question.. Whats inside the big box. I thought the cat was inside it...

[@MotoMirius]

It's a resonator/ silencer chamber. You will see this on the performance pipes and missing from the cheap link pipes - without it there can be a loss of mid range power.

[@TheAngusGao]

be nice to do before and after sound comparison side by side, so we can hear how much louder it becomes

[@MotoMirius]

It would be nice but in my experience it is very hard to accurately reproduce the sound difference on video. What I can tell you is that there is no other change which makes such a big difference in sound volume. Skäl David

[@brizi2003]

@moto Mirius You have some great videos. Does removing the CAT and the presilencer result in the engine running cooler?

[@MotoMirius]

Thanks, much appreciated. It can help a little but I would not expect any significant change.

[@danpatrickdaduya8955]

Great video! I made the decision to upgrade my 2021 svartpilen 200's exhaust system to enhance its sound. I replaced the presilencer with a midpipe and installed a Yoshimura r77 can without the baffle, while still keeping both catalytic converters. The new sound is incredible, but I've noticed a slight reduction in power after the modifications. Any suggestions on how to get back the bike's original performance? Additionally, I'm curious if using Fuelx Lite would be beneficial for both performance and engine longevity?

[@MotoMirius]

If you've done that I would recommend a piggyback fuelling device. I don't recommend removing the presilencer - this has been demonstrated in the 390 Duke to reduce mid power. Cat removal is better in my experience. The Lite seems to be a good product in terms of engine longevity - if you want performance then you really need to use a product which optimises the maps, not just avoids lean running.

[@fredstah714]

I love your videos because it gave me lots of infos on how to on my Duke 390. Question; if I just take the exhaust off and keeping the cat on, it’ll be more loud, right? And will i lose power?

[@MotoMirius]

Thanks, much appreciated. It will be louder but it will probably not sound good. One of the most difficult parts of exhaust modifications is to end up with a good sound. You should also expect to need to fit a piggyback because it will make the bike run leaner and that’s a problem because they are already borderline too lean. Skäl. David

[@pogingbagsikmagno4976]

Nice video also a good mods, can you give link descriptions for your complete exhaust mods. And where do you both it,,, cheers

[@MotoMirius]

Hi Neil, Thanks for that. I'm going to be adding a couple of exhaust videos over the next few weeks including ones on modding the stock exhaust and removing the baffle on an Akrapovic so the best place to find them is the playlist kzbin.info/aero/PLpKOr6GM2hB3yKDghMX1Ysll4aq0Q_0Y- which has related content such as the airbox lid. Skäl David

[@pogingbagsikmagno4976]

Moto Mirius thanks mate appreciate

[@henrikschoen9770]

hello, great video, I have a question, was a new tuning for the engine necessary?

[@MotoMirius]

I would recommend at least a basic tuning box. Skäl David

[@henrikschoen9770]

Thank you!Have you an Link for me(from the product which i can use?

[@thereallatexdragon779]

Hey man, I just bought a 2017 Duke 390, I have a slip on exhaust for it but I think you mentioned in your video you do NOT need to do any performance changes in the computer system for the EFI when you put the Leovince pipe in? I just wanted to confirm that I do not need to if I put that pipe in, dont want to damage the bike is all! Awesome video, love it! Cheers

[@MotoMirius]

Nice choice! If you have no other mods then you might get away with not adding a piggyback. As stock you can change the slip on to an Akrapovic which flows more than the stock, so the system has some leeway. If you have a slip on then I'd recommend a piggyback with this. On the upside it will give you the ability to make more changes! Skäl David

[@theodoretsakoumas6416]

hey David! I love the videos you post, they're so helpful. I got a cat delete as well but am having problems with the spacer and screw. Would you be able to take a pic of where the spacer was placed and how it was fitted?

[@MotoMirius]

Thanks much appreciated. Spacer goes between the ends of clamp. If you are having issues getting it to fit then you have an alignment issue which is normal when fitting exhaust parts. Loosen off the slip on and sometimes even the cat delete and get them to fit together better. Skäl. David

[@kubenq]

11:02 Future or present ktm duke users don't do this.... putting it back in is hell I put it in 3 people for 4 hours, finally succeeded

[@MotoMirius]

It's not hard. Takes me about 20 minutes to remove this and put it back to stock. The mistake most people make is that they don't realise that the bottom mounting tabs get bent in at the factory (it's why the presilencer is hard to remove in the first place). You need to just lightly bend the lower frame tabs out a little and it all slips back together (with just one person).

[@kubenq]

But I have pre lift 2016 abs, not afterlift​@@MotoMirius

[@MotoMirius]

@@kubenq Then why comment on a video about a facelift exhaust? But, it doesn't really change anything, all that happened on the facelift bikes was that they needed to add the silencer to meet new emissions standards so they broke out the parts into three instead of having them all in the same unit. But it fits in the same space, so the process is quite similar.

[@tagurosurtec]

Good day! Your video is so much helpful. Can I ask if i can use this product on my ktm duke 250? Thanks in advance.

[@MotoMirius]

Yes, it should be fine on your 250, but check at point of sale. Skäl David

[@bjorngeudens2463]

Hello, love this video. sorry for my bad english but i have a question. Of i do remove the cat and pre silencer with Akrapovic silencer do i need to do other things to?

[@MotoMirius]

I would recommend thinking of a piggyback. Which depends on if you want to make more changes. A good and simple one is the FuelX Lite.

[@bjorngeudens2463]

@@MotoMirius and what exactly is a piggyback? What does it do?

[@MotoMirius]

@@bjorngeudens2463 It's a device that sits between the sensors on the engine and the stock ECU (hence the name piggyback) which modifies the readings from the sensors which allows it to manipulate the response of the ECU. Most commonly it fools the ECU into supplying more fuel so the engine doesn't run so lean.

[@bjorngeudens2463]

@@MotoMirius and if i dont put that device on my bike? What van happen? In Belgium we have a boosterplug that does the same i think. Correct?

[@MotoMirius]

@@bjorngeudens2463 If the engine runs lean then you buy a new engine. Boosterplug is Danish not Belgian - all are available in Belgium. Boosterplug is a very basic piggyback - it modifies the temperature sensor reading, FuelX Lite is more accurate and not so different in price.

[@kal1385]

Is stock presilencer a catalytic converter..... I mean the black box like thing a catalytic converter......??

[@MotoMirius]

On the gen 1 Duke (up to 2016) the cat is in the presilencer. On the gen 2 Dukes, the cat is between the header pipe and the presilencer and the presilencer is just the first silencer.

[@kal1385]

@@MotoMirius sir removing catalytic converter increases performance ........!! Will removing presilencer increase performance ???

[@MotoMirius]

@@kal1385 This is a subject I'm in the middle of doing some real life testing on - but it will take some time. Some claim that removing the presilencer does not increase performance - if you look at the systems supplied by the performance oriented suppliers such as Akrapovic, Arrow and Leovince then they retain a presilencer - it is only the suppliers of loud exhausts who remove it. I suspect it will make little difference to performance as it flows well.

[@kal1385]

@@MotoMirius and what is inside the presilencer?? Is it like a empty box.....?? Does it help to reduce sound levels??

[@MotoMirius]

@@kal1385 its a silencer not an empty box - an empty box would resonate and increase noise - its purpose is to reduce noise levels without reducing power. There are three primary ways to reduce noise - the presilencer uses the one that has the least impact on power. I suggest that you watch my video on making the Duke louder if you want to understand more.

[@ConradLind]

Hello, i have a Svartpilen 125 2021 and I have been thinking of changing the exhaust from an underbelly to a sidlying pipe. Im wondering if the sidelying pipe on the pre 2017 ktm fits since its the same engine and frame. And do i have to reconfigure the ecu as the flow changes or does the ecu change by it self?

[@MotoMirius]

Hi, it should fit as you note. I'm not familiar with the brackets on the under engine routing, so they might have been changed - but nothing that can't be overcome. Your bike is tuned for a different level of emissions and the resulting exhaust so you should consider a piggyback exhaust as the changes are likely outside of what the ECU will be able to correct for.

[@ConradLind]

@ Hello again, I’ve been thinking about putting on a sidelying exhaust as I said before. You mentioned a piggyback ecu but can I use a fuelx lite for the same thing since fuelx changes the fuel mapping and that would be the thing an aftermarket exhaust would do?

[@MotoMirius]

@@ConradLind FuelX Lite is a piggyback ECU. Yes, you can use it.

[@ConradLind]

@ Great, thank you for the info!

[@eliasbragvin211]

great video btw. i want to do a cat delete on my ktm duke 125 2017. right now i have a arrow slip on, but wanted to get more sound. my question is; is it bad for the engine to do a cat delete?

[@MotoMirius]

It's only bad if you run both a slip on and a cat delete and don't add a fuel controller. Some argue that both are OK, but I don't like to gamble with your bike if you are asking me.

[@eliasbragvin8288]

so i shouldn't put a leovince middle pipe on on my slip on arrow?

[@MotoMirius]

The performance pipes like the Leovince you see here, and the Arkra fitted to the gen 1, which are developed on a dyno, have a resonator in the pipe. The ones you shouldn't fit are the ones that are just a pipe. But, that said it will restrict your choice of slip on. I prefer to keep the presilencer because then I can fit a small slip on. If you remove the presilencer then you end up needing a big slip on to keep the noise levels down. But there is no one single answer - it all depends what you like and what the enforcement regime is where you live. @@eliasbragvin8288

[@MulTfrancis]

Can I do the presilencer delete with out getting rid of my header and cat? I have a 2022 ktm duke 390 and like the looks of leovinces presilencer delete the most

[@MotoMirius]

Yes, but dyno tests show a loss of mid range power with the presilencer delete, so the LeoVince as shown here would be the only one I suggest as the resonator chamber will mitigate that a bit.

[@Thevoiceofsense]

Buddy that pre-silencer, has it got a tiny hole at the bottom that when idle, you can feel the air coming from it? My duke has come and I noticed it had a perfectly circular hole, but thought I'd ask:)

[@MotoMirius]

Yes. Most silencers will have a hole to allow moisture to drip out which helps stop the silencer from rusting out if the bike is left standing for a while.

[@IndiaNumber1-cz2yi]

Does d cat will affect my enjine Of my Duke 390 bs4

[@MotoMirius]

Yes. I would typically suggest that one modification is normally OK, beyond that you should be running some fuelling connector.

[@chickenstripz_za]

Hi David First off, excellent channel and equally excellent content! Excuse my ignorance please, but I can’t seem to find any answers. I have a 2017 duke 390, she does have the akrapovic slip on fitted but still has the cat and pre silencer. Everyone says to remove the cat and pre silencer I have to get a power commander as the bike will run lean. Is this true? Or will the standard system adjust to it? Is there anything I need to be careful if I’m considering this

[@MotoMirius]

Thanks. Yes, it's true that you should get a piggyback if you want to be safe and avoid the risk of engine damage - the Leovince isn't too bad compared to the straight pipe alternatives, but it's at the limit of what I would run. I wouldn't recommend a Power Commander unless you know what you are buying and intentionally choose that product. I would suggest something like the FuelX if you are new to piggybacks. The standard system does adjust but it has a limit to the adjustment - which is place there to keep the stock system within emissions limits - but when you change the system, it needs to be outside of those limits.

[@chickenstripz_za]

@@MotoMirius as expected, great advice. Thankyou David 🔥 will look into piggybacks and see what I can find on the local market, otherwise will look at importing! Appreciate your time!🤘🏻🔥 keep up the great content

[@martinpearce7420]

Hello again I'm either going to have the arrow cat only delete or the leovince cat and pre muffler delete obviously a lot more noise with the latter but what is the power/smoothness difference did you end up with the arrow because the leovince was just to loud? Thanks again so much for all your videos ps I have already have a ecu piggyback :)

[@MotoMirius]

Hi, the dyno tests that Coober and some other have done suggest that mid range power is better with the cat only delete retaining the presilencer, compared to a cat and presilencer delete. You will note that the full delete pipes from proper exhaust manufacturers such as Leovince and Akrapovid (gen 1 only) have a built in silencer to compensate for this. Presilencer really doesn't make it a lot quieter, it's a fairly subtle change. But with the leovince I did have to run with the baffle in - with arrow, I might be able to get away without the baffle, but it's pretty loud.

[@shravankrajeev5154]

Is that will affect any bad things to our engine by removing the catalytic converter (that big black thing)

[@MotoMirius]

The black thing is only the cat on the gen 1 bikes. On the gen 2 bikes the cat is the small pipe that sits on top of the black thing - I have another video on just replacing the cat which is often my preferred thing. It can damage the engine yes, which is why I recommend fitting at least one of the basic piggybacks to make sure this doesn't happen - if its the only change to the bike you can often get away without damaging your engine, but it's your risk to do.

[@shravankrajeev5154]

@@MotoMirius ok thankyou❤️

[@topiteuho]

I have akrapovic slip on my 2017 125 duke. Today I bought this leovince cat eliminator. It is okay to install that cat eliminator without remapping?

[@MotoMirius]

I wouldn't recommend it. You've got some expensive parts fitted, spend a little more on a basic piggyback - engine rebuilds are very expensive. Skäl David

[@Taisuke1999]

The one that you used for searing pipe and bought it from KTM is “exhaust flange gasket” ?

[@MotoMirius]

KTM part number 93805005100. Skäl. David

[@arnodewilder6833]

Hi, I just took down part of my exhaust on my KTM duke 125 from 2017 to pollish it. But now when I ride it it stutters when I quickly give it gas. Do you think that the cause could be maybe bad gaskets for the exhaust? Or is that impossible. Thx!

[@MotoMirius]

Polishing will not cause that so most likely either the gasket was damaged or you have not aligned the exhaust properly. In either case you can check by running the bike and check for leaks at the joints but be careful not to touch with your bare hand and burn it.

[@arnodewilder6833]

@@MotoMirius thenks for the reply! I checket for leaks but didn't feel any other exhaust flow. So that's why I am a little confused. I'm gonna try new gaskets and see whar happens. I maybe also punched a small dent in the pre silencer tube where it mounts to the kat. But I tried to punch it back so it is not 100% as it is but I thought it would be good enough.

[@MotoMirius]

Maybe. But if you can’t feel a leak then that doesn’t sound like the issue.

[@Anonymous-yg3cp]

nice video, I'm following you from Italy and in my 2018 duke 125 I have a MIVV exhaust. I would like to remove the catalyst but I am afraid that the carburetion could be ruined. If I put the decut I have to change the filter and map the switchboard or not? Thanks and Merry Christmas

[@MotoMirius]

Thanks. Yes, I would recommend if you decat with an aftermarket exhaust like a MIVV then you should fit a piggyback to avoid any risk of engine damage. You do not have to change the air filter. Skäl David

[@Anonymous-yg3cp]

@@MotoMirius sorry David, but what is a piggyback? I can not translate it

[@MotoMirius]

@@Anonymous-yg3cp The 2017 > Duke have a locked ECU - you cannot change the map. So you plug in a second ECU between the bike and the bike ECU - this allows you to change the signals to and from the bike ECU - this second ECU is known as a piggyback - like this - www.dimsport.it/en/rapid-bike/

[@domenicopascale_]

hello at minute 16.14 I didn't understand what you inserted in the final part of the decat leovince ... could you explain it to me?

[@MotoMirius]

Hi, there is a seal which fits between the two pipes (this is a standard KTM part) - this is easily damaged when changing the pipes so I normally keep a spare and in this case when I bought the pipe it didn't have one. You can buy them from your KTM dealer - part number in the description. Skäl David

[@domenicopascale_]

Moto Mirius thank you, but it is necessary to insert it? I can take it from the old catalyst?

[@Axu_02]

I had this in my 2017 ktm duke with akrapovic exhaust. Too loud. Took it of and put the catalytic converter and black box again in place. I even put db killer with akra but it did not help with the loudness because it only took the deep bass sounds away.

[@MotoMirius]

There is a time and a place for loud exhausts. This mod doesn’t suit everyone and if I lived somewhere else I might not run it either. Skäl. David

[@Axu_02]

@@MotoMirius Yeah. I live in a small city and I also think that it is too loud for daily driving.

[@MotoMirius]

Yeah. I live in a big and noisy city. There are lots of options to tune to the right level of noise. There is a pipe that just replaces the cat and leaves the black presilencer to make it just a little louder but not as loud as a full cat and presilencer delete.

[@Axu_02]

@@MotoMirius Yes. I was stupid and ordered the one with also presilencer delete because it was only 70€ and the cheapest only cat delete pipe was 150€...

[@MotoMirius]

AxU not stupid. You don’t know till you test it.

[@sivasurya5432]

Hey if i do cat delete on a duke 390 and use stock exhaust do i need to make ecu changes???.....thanks in advance😇

[@MotoMirius]

if you only have a cat delete and no other change you are probably OK. It can never be guaranteed without putting your bike on a dyno and testing it.

[@kevinpinheiro2485]

I'm having a 2018 RC 390. And I wanted to get a decat. Would I still need a piggyback ECU or could I just replace it ? The one I'm thinking about has a pre silencer

[@MotoMirius]

Hi Kevin, if you are just removing the cat but leaving the pre-silencer and the exhaust is otherwise completely stock then chances are that you won't need a piggyback. Skäl David

[@kevinpinheiro2485]

@@MotoMirius it's exactly the same as yours.. but what I found isn't a leovince. Also wanted to ask your review about the cat delete.

[@enzomarci3824]

Bonjour, Faut il modifier la cartographie moteur suite à ce changement ? Merci à vous Enzo

[@MotoMirius]

Si vous supprimez à la fois le chat et le présilencer, vous devriez envisager un ferroutage. Si vous avez apporté d'autres modifications telles qu'un slip, vous devez installer au moins un écu de ferroutage de base.

[@bengalitragedy]

I know I'm a year late but I'm just trying to figure out if this Leo Vince mid-pipe will be compatible with my 2020 RC 390 especially since I've just put on a Competition Werkes GP exhaust on it. And isn't it bad thing to remove the cat convertor?

[@MotoMirius]

I'm not familiar with the 2020 RC, but the later RCs appear to run the same exhaust as the Duke, so physically it will fit. In terms of bad, it depends how you mean. Environmentally, perhaps but cats in themselves are somewhat controversial because they hold concentrated contaminants that there isn't really a good way of disposing.

[@Serveronmc]

Do you need a piggyback for this on the 390duke 2019 model? Love your vids btw!

[@MotoMirius]

Thanks and much appreciated. My usual advice is that if this is the only change you have made and you don't live somewhere extreme such as high in the mountains, then you are probably OK. The safe route would be to fit a basic piggyback. Skäl David

[@Serveronmc]

@@MotoMirius Ok. Thanks a lot for the quick answer!

[@TristanFarley-o3u]

Hello mate I’ve recently juts added a new full exhaust system too my ktm rc 125 2023 but I’m having some problems my engine light has come out my bike doesn’t ride the same it’s rlly boggy ,idle is all over the place could this be the exhaust and how too I get around it as I rlly want the exhaust on my bike

[@MotoMirius]

Depends what you mean by a full exhaust, but if you have removed the original system and replaced it with a free flow system, then you would need to update the map - not doing so not only is likely to create issues with idle (this is often normal after fitting a new exhaust as the ECU needs to update the map), but also can result in engine damage if the change is beyond the adjustment limits allowed by the ECU.

[@TristanFarley-o3u]

@@MotoMirius cheers mate thanks for the advice how too I Change map or ecu is it easy too do or do you reckon I’m best taking it too a bike garage ktm for example and let then do it what would you suggest

[@TristanFarley-o3u]

@@MotoMirius if I was too buy and fit one of those rapid bike easy control module would this solve as then I am able too alter the air and fuel ratio myself ?

[@TristanFarley-o3u]

Also is there any were else I can get hold of you other than here too help with the bike ?

[@RealtorCardozo]

I have a 390 Duke and I want to get a decat for it, and I have an SC Project C-RT silencer. The problem is my dad doesn’t want me to get the cat delete because he says it’ll be too loud and it’ll mess with emissions. Are there any significant advantages to deleting the cat? I really want to get it.

[@MotoMirius]

Well your Dad is right. You’ve chosen a slip on that is best known for being loud. A decat will at least double the volume of any slip on. And you will for sure need a piggyback ECU. The biggest advantage of deleting the cat and presilencer is that it’s the cheapest route to a much louder bike - much cheaper than your SC. That aside it’s also a requirement if you want more power but then your SC probably won’t help with that. Skäl. David

[@efemuratgezen5716]

Hi David, did the removal of the cat cause any problems with the gas? Did you have to change to power plugs?

[@MotoMirius]

I removed cat and presilencer so I run a piggyback ECU to ensure that the bike does not run lean as a result. You can probably run just a basic unit but if you decat then chances are you will do more so worthwhile just going fir a proper unit. Skäl. David

[@Vandetta1986]

Hi! Did your fuel consumption increase after removing the catalyst? Is engine RPM stable? I wonder if you don't need to change the ECU map after this change?

[@MotoMirius]

Changing the exhaust will tend to change your riding style so it’s very hard to isolate fuel consumption outside of a dyno environment. If it’s the only change and you ride in a relatively normal environment then you can get away with no ECU changes. But I’d suggest at least a basic controller.

[@eirikhage1282]

Is it a little silencer inside that midpipe? Cause I want a midpipe but not as loud as the blackwidow and mivv.

[@MotoMirius]

I believe that it does have that function but without directly comparing it, I’m not sure it’s much quieter. I run a baffle in the silencer when using this mid pipe and the loudness is ok. Skäl. David

[@nicolahill4602]

do you have to do any more modifications when removing the cat? and if so what did you do

[@MotoMirius]

I didn't do any mods relating to the cat removal as I'd already fitted a piggyback to ensure that there would be no fuelling issues - cat removal was not the only mod I had planned.

[@topiteuho]

where I can buy this ktm ferrule which go to between akrapovic slip on and leovince cat eliminator?

[@MotoMirius]

If you mean the gasket - talk to your KTM dealer - there is a part number in the description. Skäl David

[@ehrlein7841]

Is this combination with the Akra Slip On and the Leovince De Cat legal?

[@MotoMirius]

That isn't a good question. In some places it is legal and in others it is not. In some places where it is not legal, there is little enforcement so people fit them. In some places where it is legal people don't fit them because the police use it as an excuse to stop riders for inspection (and in some places so they can ask for a cash 'fine'). So the answer is that you need to understand the local laws and customs of where you ride - it will likely be different for you compared to me.

[@Bawsack121]

Do you need the kiddyback for this or can you do it without it

[@MotoMirius]

If this is your only mod and you have the baffle in, this should be OK. I would recommend a basic piggyback to be safe. If you have made other mods then you should consider an appropriate piggyback. Skäl David

[@chrisgemmell2742]

Can you tell me how fast a ktm duke 125 should go top speed after its first service thanks mines only doing around 65mph

[@MotoMirius]

Bagoros Performance recorded 70 mph with a stock 125. Yours should get a little faster once the engine is fully bedded in now you are past the first service - but top speed is dependant on many factors such as rider weight, rider position on the bike, wind direction, uphill/ downhill etc so I would advise not worrying about it too much - lots of high speeds seen from India but from people weighing about the same as a five year old and lying flat the tank going downhill with the wind behind them.

[@chrisgemmell2742]

@@MotoMirius haha guess thats true its embarrasing sitting at 64 and cant go any faster when my keeway rkf done 75 first day i got it

[@MotoMirius]

@@chrisgemmell2742 its partly a function of gearing. But everything is a compromise when you are at that low level of power.

[@chrisgemmell2742]

@@MotoMirius yeah true thanks for the reply

[@adamstyles823]

By removing the cat would you need to remap the ecu or would stock ecu be ok with such changes?

[@adamstyles823]

Ok you answered at end of this video thank you

[@MotoMirius]

Glad you found it. In reality there isn't a simple answer to this one because there are a lot of factors at play, so the safe option is really to use something, even if one of the more basic controllers that just make the mix a bit richer. Skäl David

[@kenssnog2768]

How would it sound to do just like you but with stock exhuast? Will it harm the engine?

[@MotoMirius]

How much louder will depend on whether you go with a pipe like mine that has a mini silencer on it that doesn't impact the power, or just a straight pipe which is much louder. If it's the only change you make it shouldn't harm the engine, but I'd recommend a basic piggyback to be sure - and a more advance one if you plan to do more. Skäl David

[@kenssnog2768]

@@MotoMirius yeah exactly like yours with a mini silencer but instead of akrapovic exhaust, what if I keep the stock exhaust? Would I still need piggy back ecu? I only want to get rid of that black pre muffler but dont dont want to get loud.

[@MotoMirius]

@@kenssnog2768 That presilencer is a well designed unit - it loses very little power but take out a lot of the sound. If you are intending using a small silencer with removing the presilencer then it will get very loud and you will certainly need a piggyback.

[@CoalacolaLP]

Is it possible to build the cat back into the bike....asking because it looks very difficult to get it out of the bike.

[@MotoMirius]

You can buy pipes that replace only the presilencer, or pipes that just replace the cat. What you can take out, you can put back - all this is bolt on. Presilencer is a very tight fit, but a couple of minutes with a file makes it easy to refit. Skäl David

[@CoalacolaLP]

@@MotoMirius Ok thank you for the answer.!

[@Massacheefa]

Where can I bull a full akrapovic exhaust system from? With de cat

[@MotoMirius]

Akra only supplied a full system for the gen 1. You'd need to find one and add a header from a gen 1 or better a Tyga header. That would be mostly bolt on.

[@Massacheefa]

@@MotoMirius I was thinking of a competition works de cat with the akra slip on 🤔

[@MotoMirius]

@@Massacheefa dyno shows that the presilencer is important for mid range power. You will note that the exhaust manufacturers who test their products on an in house dyno include an expansion chamber into the cat/presilencer delete pipe - Akra and Leovince for example. If keeping the presilencer then any of the cat deletes including Competition Werkes are fine - but be careful in your choice if you delete cat and presilencer - the expansion chamber in the leovince used in this video is there for a reason.

[@filiprozehnal7254]

Is there any speed difference between stock catalyzator with stock exhaust and Leo vince cat off with Akrapovic? Thank you :) I consider to do same upgrade like you

[@MotoMirius]

I’ve not measured any of the changes. You aren’t going to see a massive difference and any single change on its own doesn’t do a lot. But together there is a noticeable difference. Skäl. David

[@braaap_rider5431]

hey, where can i get a ECU for a decat for my 2020 duke125

[@MotoMirius]

The first thing is to decide which sort of piggyback you want - kzbin.info/www/bejne/l6iXhp6BhLCcrNk That video is getting a bit old so the products have changed, but the decision process in it hasn't.

[@NateEnns]

Hi again David - I just put a cat and pre-silencer pipe on my 2018 Duke 390. I idled it for 10 mins then went for a short ride. The service light came on while riding, but it wasn’t running hot (rad fan wasn’t even running). I checked and there was till another 500kms left till next reg service. Any ideas?

[@MotoMirius]

So long as it's the service light and not an error light, that should be fine - if you get an error light then I'd recommend at least a basic piggyback. Service light could be because a year has passed or I suspect it comes on a little early to give you time to book the service.

[@NateEnns]

@@MotoMirius it’s the “!” surrounded by a triangle.

[@MotoMirius]

That’s not the service light unless you have a gen 1 or RC?. I don’t really recommend the idle reset for this reason. You could ride and see if it goes out as the ECU adjusts but I’d recommend reverting to stock. You can then either get a basic piggyback or wait a few hundred miles for the ECU to readjust and try again without the idle reset.

[@mikeymike3240]

Hi Dave, just subbed you, thanks to Matt. Sweet bike, nice instructional video. Looking forward to seeing more on Damage, i loved that bike,I’m sure you’re gonna give her a great home. That sounds nasty.....i like it a lot. lol. Also liking your other bikes. 😎👍👍

[@MotoMirius]

Thanks Mikey, much appreciated. Skäl David

[@dannyvanderveer9949]

Hello guys i have been ruining around with this question and nobody could have helped me so far. Does removing the cat ruining some sensor readings and creating an error in the display?

[@MotoMirius]

It depends - there is no simple answer to this. Typically, for most riders, who have made no other modifications to exhaust or inlet, no this does not create an error. If you have, then you should consider fitting a piggyback before making this modification.

[@explorewithme3772]

Can this be fitted in duke 200 ??🙏🙏

[@MotoMirius]

If it is a gen 2 Duke then it should - if it is a gen 1 Duke it will not - check the Leovince website - if it doesn't say it will fit your bike then it probably won't. Skäl David

[@rjtastic]

so is it safe to de cat without flashing the ecu? and what if i decat and install a performance air filter?

[@MotoMirius]

If you have a gen 2 you can't flash the ECU, you need to fit a piggyback ECU. Opinions vary as to when you need a piggyback - some of it depends on where you live. But if you decat, it's almost certain that you are going to want to take another step, change the slipon, remove the baffle or do some form of airbox upgrade, so it's best to just plan ahead and start thinking about which piggyback is going to suit you. If you are going to decat I'd recommend at least a basic piggyback - it's cheaper than an engine rebuild so good insurance. Skäl David

[@rjtastic]

@@MotoMirius thanks dude youre the best. what im thinking RN is getting a booster plug, a k&n filter, decat & stick with the stock slip on. what do you think? i own a duke 250. is it going to be a correct config?

[@MotoMirius]

@@rjtastic BP is the most basic of piggybacks, it isn't designed for what you are looking at, but it might be OK. I lean towards the RapidBike Easy as it has proper sensors and has some adjustment

[@rjtastic]

@@MotoMirius oh so that means I'm asking a little too much outta my piggyback & my engine. Thanks for the reply mate. I'll just stick with the stock filter then.

[@MotoMirius]

@@rjtastic Not too much from your engine. BP just adjusts the input from the temperature sensor - it isn't a proper ECU and has no maps. Get a proper piggyback instead.

[@federicogargioni4146]

can this also be good for mt or is there a similar one?

[@MotoMirius]

There are plenty of choices for the MT. Skäl. David

[@federicogargioni4146]

Moto Mirius like which ones?

[@MotoMirius]

@@federicogargioni4146 I don't own an MT so I'm not going to recommend something I have no experience of.

[@federicogargioni4146]

Moto Mirius ok ok thanks

[@muhammadaziman4950]

Learn a lot from this video! Great and beneficial video

[@MotoMirius]

Thanks very much Muhammad. Much appreciated 👍 Skäl. David

[@onevrisedadan4015]

Hello, I own a 2015 duke 200, can I install this cat eliminator and the carbon silencer on my bike? B/R

[@MotoMirius]

The gen 1 Dukes have different exhaust mountings. I would recommend using something designed for your model. Here for example you can see a similar set up for your bike. www.leovince.com/en-gb/product/8566b-gp-style-black-stainless-steel-ktm-duke-200. You would have to contact them about the decat pipe. But there are others out there. Skäl. David

[@BeastOnStreet]

soo.. if i install an akrapoovic slip on and alsoo install this leovince cat deleter , doo i need a ECU immediatly?

[@MotoMirius]

I would run an ECU with this even if I had a stock exhaust. Skäl. David

[@BeastOnStreet]

@@MotoMirius so i imagine if i go akrarpovic , DNA fillter , decat .. its one way or blow up the bike

[@MotoMirius]

Yes to be blunt. You could try it and prove me wrong but I wouldn’t recommend it.

[@RW-vi2zz]

sir, can i reuse the seal from pre-silencer, or i should buy a new one?

[@MotoMirius]

You can reuse it so long as it isn’t damaged. Skäl. David

[@Rwhatify]

The pre silencer has a metal sleeve that goes between the front that goes though the rubber isolators. The one the long bolt goes though. I just put it on a grinder until it slipped back in freely. Don’t go grinding the hell out of it.

[@MotoMirius]

Yes indeed. Not enough clearance on that spacer. Certainly needs clearancing before refitting but as you say, too much is too much. Skäl. David

[@ilgiannino]

There Is no problem for the carburation with this no cat solution?

[@MotoMirius]

Yes there is. Which I make clear in the video. I would not recommend doing this unless you have an aftermarket fuelling device in place. Skäl. David

[@geraldambagan3992]

@@MotoMirius what should first upgrade, fuelling device before install decat mid link pipe? If do first, what u recommend best fuelling device?

[@jeanpascalferrand4349]

Hi david, if i delete cat, l have to change air filtre or the basic is ok ?

[@MotoMirius]

Stay with the stock air filter, cheaper to buy the open airbox lid than buy aftermarket filters on the gen 2 bike. Skäl David

[@Harry-zg1pm]

Do most decat pipes fit with akropovic muffler?

[@MotoMirius]

If its designed to fit the bike then yes. If you buy a gen 1 decat it wont fit a gen 2. Cheap chinese copies, then you take your chances.

[@xavier-eo5pr]

Will this mid bend pipe fit duke 200 2017 model?

[@MotoMirius]

I see no reason why not, but they don't sell the 200 here so I cannot check. Only the header pipe is different between 125 200 250 and 390

[@matosmatitos2178]

Thanks. The video help me a lot. Peru 🇵🇪.

[@MotoMirius]

Glad it helped!

[@alekosargyriou8214]

does the remove improves performance ?

[@MotoMirius]

CAT removal does tend to improve performance but no single change will have a big effect and you will need to consider the fuelling if you go this route. The biggest change is the increased sound.

[@jamesboreham9002]

Ive been looking for the seal from the decat to the silencer for ages amd could never find it could you send me the link to where you got yours thamks.

[@MotoMirius]

KTM part number is 93805005100. Search online or buy at your KTM dealer. Depending where you are in the world, shipping from my UK source may not be ideal for you. Skäl. David

[@jamesboreham9002]

@@MotoMirius thank you im from the uk myslef so it should be okay thanks for replying so quick.

[@MotoMirius]

I tend to order from Fowlers. You will find the online parts diagrams useful for finding parts like this 👍

[@elvy3236]

Can I just install the aftermarket cat with the factory slip on?

[@MotoMirius]

It's designed to fit the factory slip on - that is why the Akrapovič slip on fits. Skäl David

[@louistaylor53]

Dude im a little confused lol , Your saying a ktm 390 is what your working on but it has 125 written down the side ?

[@MotoMirius]

I see the trick works. In the car world it would be known as a sleeper - people just believe what they see. On small Dukes the panels are all the same so you can just swap them. Want to make your 125 look like a 390; just put 390 panels on. If you know what you are looking at then you'd know that KTM use different frame colour schemes for the different models, but most people aren't that hard core KTM fanatics.

[@kevinmendoza8537]

El supresor de la Duke 390 le sirve a la Duke 250¿?

[@MotoMirius]

Es lo mismo

[@elvy3236]

Is that cat is lighter than the factory one ? How much less ?

[@MotoMirius]

It's considerably lighter. The presilencer is a heavy lump of metal, the cat is lighter than that. I didn't weigh it but I can't imagine any other mod you can make which save this much weight. skäl David

[@jacksondowning9807]

do you have to retune the bike after this cat delete

[@MotoMirius]

You can't retune the bike as the ECU is locked so you need to fit a piggyback device. If you make no other changes you might be OK without doing anything, but i'd recommend at least a basic device and the more you do, the better the device needs to be.

[@psuiam_0107]

Can i used it on rc200 2015model

[@MotoMirius]

I would say no - RC will probably be using the gen 1 style slip fit joints in the exhaust - this uses gaskets at the joints.

[@geraldambagan3992]

@Moto Mirius what should first upgrade, fuelling device before install decat mid link pipe? If do first, what u recommend best fuelling device?

[@MotoMirius]

Fuelling device first - you can run the pipe without and you may be fine but in the long run you may not - if everything else is stock and you don't live somewhere extreme then you will probably be fine without. I have a video on choosing a fuelling device - which I recommend will depend on the answers you have to the questions I give you in that video. Skäl David

[@KrazyKanucker]

Do you think removing the cat will prevent me from passing an emission test in Canada?

[@MotoMirius]

I would suspect it would not - but just talk to your local testing garage. You might have to try a couple if they are anything like the UK, but in the UK they don't test bikes for emissions and also dont test sound levels in the MOT

[@KrazyKanucker]

@Moto Mirius I forgot, testing was cancelled a few years ago in Canada. I wonder what no cat and stk exhaust sounds like on 2021. Ill search later today. That sounds great btw, thank you.

[@KrazyKanucker]

@@MotoMirius I think Royal Jordanian has two pipes and an electrically actuated bypass valve with a switch on handle bars. 🤔. My neighbor is a policeman btw 😄

[@MotoMirius]

@@KrazyKanucker Legally in the UK as I'm sure in most countries, you can't alter the fitted emissions kit (and that includes sound) but the loophole is enforcement. For cars, emissions are tested in the MOT, but not for bikes. But if you get pulled over for a DVSA roadside inspection (rare) you would have an issue. A loud bike is an excuse for the police to pull you over to see if they can find anything wrong with you or your bike - I suspect these are the reasons RJ has followed the car route with electronic flaps in the exhaust not because of MOT - he lives close enough (or he did last time I checked) to me that he could if he wanted use the same MOT testing station.

[@marcorossi3894]

Where can I buy the WP stickers for the suspension?

[@MotoMirius]

I don't know anyone who supplies them. I suggest talking to someone who rebuilds WP suspension as they should be able to order parts - KTM only supply the complete fork legs. Skäl David

[@dobbingus2018]

would fuel x be a good piggyback?

[@MotoMirius]

Yes, it would work for this - but you want the Lite, do not use the Pro.

[@dobbingus2018]

@@MotoMirius thank you,why not the pro ?

[@MotoMirius]

@@dobbingus2018 Because I don't get the impression that you have the necessary training, skills and experience in tuning to be able to measure and decide which setting you might want, and the Pro is intended to work with a fixed map on something like the PowerTRONIC piggyback rather than the stock ECU. Of course if, like many riders, you want to use the Pro and guess which setting to use based on how you think the bike performs then feel free to do so - but you might want to get some estimates of how much it will cost to rebuild the engine if you choose the wrong setting, before making that choice.

[@dobbingus2018]

@@MotoMirius Thanks. Ive got no way to dyno it so i wont mess w the cat then.

[@MotoMirius]

@@dobbingus2018 FuelX Lite is fine, you'll only need a dyno if you intend to run a proper piggyback. The Pro is a specialist tool designed for professional mechanics - just as you wouldn't install a four post lift for your car.

[@RW-vi2zz]

mate, im planning to cut delete my RC 390 with my stock engine and stock ECU, is that okay?

[@MotoMirius]

RC is not the same as Duke, though the engines are similar. I would be cautious. It will probably be fine so long as you are running a baffle and have no other changes. On the other hand it depends if you intend to make further changes in which case I suggest looking into a suitable ECU and I recommend the RC390 forum as they have plenty of RC specific advice on there. Skäl David

[@RW-vi2zz]

Moto Mirius thanks for the advice. Ride safe.✌🏻

[@emmersoneaslea5749]

Would this go on a 2016 duke

[@MotoMirius]

It would if you used a header pipe from a 2017 onwards bike. The gen 1 bikes use a slip fit joint between the pipes of the exhaust, the gen 2 bikes use a gasket.

[@Antoriik]

It is a problem if we don't remap the bike ?

[@MotoMirius]

I wouldn’t recommend not doing it. I talk more about it here Which Piggyback ECU? KTM Duke 390 125 250 kzbin.info/www/bejne/l6iXhp6BhLCcrNk. Skäl. David

[@gr9101]

Can I use that bendpipe in my Ktm rc 200?

[@MotoMirius]

RC typically runs gen 1 kit, so it will depend if your RC runs the gen 1 slip fit joints in the exhaust pipe - in which case, no. Or if it runs the Duke gen 2 gasket joints, in which case probably yes.

[@gr9101]

@@MotoMirius Oh I have the rc 200 2017 model which has the underbelly exhaust

[@MotoMirius]

@@gr9101 Then no. You need a decat pipe that fits that.

[@gr9101]

@@MotoMirius oh, I wanted a similar bendpipe cause it looks way better than the straight pipe which are available for RC

[@MotoMirius]

@@gr9101 If you take the complete exhaust from a Duke, you might be able to make it work, but it will likely take some modification.

[@nxteplxyz5510]

Just ordered my full cat and muffler delete 🤣🤦‍♀️.. Put a scorpion end can on it and still sounded a little weak with no baffle so thought may aswell get that on it, I’ll just switch it back when MOT is due 🤣.. next thing I best order is a booster plug ?

[@MotoMirius]

I wouldn't recommend the boosterplug for that, try the FuelX instead. I will have videos on this shortly.

[@nxteplxyz5510]

Why not the booster? Nathan.

[@nxteplxyz5510]

@@MotoMirius it’s also out of stock everywhere like the powertronic one forgot it’s name..

[@nxteplxyz5510]

@@MotoMirius going to get a evo exclusive to ktm

[@nxteplxyz5510]

@@MotoMirius will a few cat and keep the pre silencer make it louder but more throaty? My full de cat pre silencer is ridiculous when riding.. not bad at idle but when full throttle its crazy loud

[@IsotaloAntti]

daaamn that sound tough hahahaaaaa I wanna decat my 125 duke but would it require me to like get some sort of piggyback or remap? already got a slip-on on it with no db killer but it's really quiet with the pre silencer.

[@MotoMirius]

If you remove the cat and presilencer then you may need to put that DB killer back into the slip on, otherwise you will end up with just a very loud bike which sounds like you are running with a blown exhaust - it's a tough balance to get something loud but still sounds good. I would advise a piggyback - you can only remap the gen 1 bikes.

[@IsotaloAntti]

Moto Mirius yeah i know :D the 125 bikes wouldn’t be atleast like as loud as your 390 because my friend has decatted his 125. I think that’s what im going to do aswell :p

[@heartwarmcentral]

same man, got the akra slip on but it sounds stock, with no db

[@heartwarmcentral]

which slip on u got? and have you done the decat?

[@IsotaloAntti]

But I have to say that the ktm duke just doesn’t sound that good. The minarelli engine that yzf-r, mt, wr, sm-r and such have sound way better with a good exhaust. I got a scorpion without db killer and it’s great. Definately loud but not too loud and also a really nice deep sound.

[@lushrarebullies566]

Is it okay to run a slip on without a ecu

[@MotoMirius]

It already has a slip on, so changing it is fine. Skäl David

[@ssss7saud]

There’s a heat protector part missing on the shocks.

[@MotoMirius]

Shocks? Care to link me to what you are referring to? Skäl David

[@ssss7saud]

Moto Mirius I’m talking about the shock tubes. Have you not seen them? I have one on my 2019 duke 250. The service mechanic at KTM told me it’s effective against mud as well as for the heat from the exhaust pipe.

[@zaamirrazi5367]

Is this a 390 or 125?? Or are they the exact same?

[@MotoMirius]

The only difference between the 390 and 125 exhausts is the header pipe. Cat and back is all the same

[@17ShanDs]

Can u share link to buy this mid pipe

[@MotoMirius]

Thanks asking the question. It’s on the later videos but not this one. I’ve updated the description with a link to this mid pipe. Skäl. David

[@เเจ็คดอสั้น-ภ9ต]

Hi, If i delete cat and do i have to tune the ecu?

[@MotoMirius]

Normally no, not unless you have done something else.

[@KROWARIZONA]

Where did you buy this fender eliminator?

[@MotoMirius]

It’s a cheap Chinese one fitted by the previous owner. I wouldn’t recommend buying one like it as it’s going rusty. Skäl. David

[@KROWARIZONA]

Moto Mirius would you have any to indicate?

[@MotoMirius]

There are a lot of choices out there. I've not yet done any particular research, and I may just make my own. The one that springs to mind is the Rok Bagoros one - seems well made and well thought out.

[@jirizurek9685]

does it void warranty?

[@MotoMirius]

Anything that you don’t buy from KTM will probably void the warranty.

[@danielmak33]

Loud as my Remus s flow ! Nice

[@MotoMirius]

Nice and loud! I had to put the baffle in. It drew too much attention from the police 😂

[@danielmak33]

Moto Mirius but the bass is heavier without baffle. Oh, the Harley’s are way louder .

[@MotoMirius]

Yes they are. But here bikes like the Duke are police magnets because of the kids who ride them. Cruisers get left alone because they are ridden by older guys with all the right paperwork. An overly loud Duke equates to a ticket every ride where I live. 😬

[@CG17LIFE]

can it fit in 390 adventure?

[@MotoMirius]

2021 Adventure has the BS6 exhaust routing so no. Unless you replace all the exhaust from a BS4 and I'm not sure how well that will fit an Adventure

[@CG17LIFE]

@@MotoMirius thank for replying