TSP Head Install- 2024 KTM 300 EXC TBI

This video shows the installation of a TSP medium compression head and compares it to the stock 2024 KTM 300 EXC head.
2024 KTM 300 EXC TBI
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[@onthethrottle7104]

Super glad shop manager Rex was there to ensure safety and that all went well! I'm excited to see and hear your feedback on this excellent choice of upgrades. This head along with the TSP tune is going to be solid gold! Great show.

[@TokyoOffroad]

I'll be riding the bike tomorrow with the TSP ERM Power Kit and plan to post a video which includes my ride feeling thoughts. I don't know any other 7 month olds who check my work as thoroughly as Rex! :-)

[@sberga5058]

Wow, really clear installation! You looks like do the things so easy. Waiting for next videos! Thanks

[@user-pl3oc8lh1h]

That installation would definitely not have gone as smooth as it was if it weren't for Rex 😅😍

[@TokyoOffroad]

There's never a dull moment with him assisting! :-)

[@peteregger7928]

Excellent Video! Looking forward to the test ride results!

[@TokyoOffroad]

I'll post a video after the ride tomorrow...

[@mikeburnett6222]

Your redheaded assistant is quiet nice.😆

[@rdsrf]

How was it running with the oil injection delete prior to the head and tune installation? Glad to see Rex gives you a hand in the shop! He looks like a great shop assistant! 😊

[@TokyoOffroad]

It's been running OK, but definitely too rich. It has a partial throttle burble. Wil ride it tomorrow for the first time with the TSP tune and head and see if it's improved...

[@dereknagy-ew2ki]

Great vid as always 👍

[@TokyoOffroad]

Thanks! Pleased to hear that you enjoyed it

[@Mutiny-5050]

Curious what you thing of the tune mapping. I sent mine in here in the states and have a few buddies as well with TPI's . On the 2024 TBI though the mapping made the bike into a 2 stroke again and you can feel the change between maps. Crisp and clean with power all around where as before it was a tamed down power and lacked the 2 stroke hit. I had a buddy ride the bike before the tune and he said it felt like a 4 stroke. I am sure this is emissions based but man what a transformation. - To all you viewers on here that have a TPI. I would recommend just a tune as I am on my 2nd cylinder on my 2020 TPI, the KTM stock tune in my opinion and my 1st cylinders opinion feels it does not get the oil injection correct. But Tokyo you don't have that problem on the 24 as you bypassed the oil injection. I might do this later as well. Thanks for the videos and walkthrough. Wish I had this a couple months ago.

[@TokyoOffroad]

My first ride with the TSP ERM Power Kit will be on Sunday. I'll be sure to upload a video after that a share my thoughts...

[@appleSUX1]

Great Video, Thank you. However, with this head, do need to use racing fuel, or can you still use 91/93 octane gas pump? (in the U.S. premium gas octane ranges from 91 to 93 depending on what part of the country you are in. in my town we have 91, I believe in Texas its 93 octanes....). I know higher compression requires higher octane gas, otherwise you will have issue with "detention" resulting of possible engine failure, but since your compression didn't go up a lot, I'm guessing you can still use premium pump gas without needing to use racing high octane fuel, not 100% sure though.

[@TokyoOffroad]

I'm in Japan and use premium pump gasoline, which is 100 RON (about 93 AKI) with no problem. I ride from sea level up to about 4,000ft typically.

[@appleSUX1]

Very helpful. Thank you . We go from 1000 to 5000ft. As long as we can use premium pump gas, that's perfect. Thanks@@TokyoOffroad

[@TheReanim8ted]

Thanks Tokyo. Great video. Do you have a recommended silicone grease?

[@TokyoOffroad]

I'm located in Japan and use ThreeBond 1855 Silicone Grease as it's easy to source locally.

[@TheReanim8ted]

Thank you 🙏

[@DDRDK]

What torque wrenchs do you like? I like your detailed videos and curious what you find as good and quilty for torque wrenches.

[@TokyoOffroad]

All my torque wrenches are Tohnichi QL series: www.tohnichi.com/products/adjustable-torque-wrench-QLMH.htm They are full metal construction, accurate (+/-3%) and will last a lifetime of use with care. You can see some of them in this video: kzbin.info/www/bejne/o324qYCBerKYq8ksi=eK7Vmrt8l-e6rFce&t=515

[@DDRDK]

@TokyoOffroad perfect, thank you. I need of a new one but with so many out their it can be hard to figure out the best ones. Edit: just clicked on the video.... I'll be absolutely darned. I saw some "in the pits" photos of the latest usa supercross series. One photo showed the inside of the kawasaki teams tool box and had these exact torque wrenches in the box. I asked what they were with no answer but figured if they're good enough for the pros it'll work for me. By darn you linked your video and THOSE are it! Couldn't figure it out in the photos. Thank you!!!!

[@philipsmith6152]

Great video, The plug looked a little rich to me and the chamber was the same, not a bad thing on a 2t. When I did TPI, TSP said to put a 0.60 base gasket on it ?? I noticed you didnt, any reason?

[@TokyoOffroad]

In my experience the stock base gasket is 0.6mm on these bikes. Always good to check the deck height. I aim for 0mm.

[@philipsmith6152]

mine was 0.75 TSP said to put the 0.60. I never checked the deck height ?@@TokyoOffroad

[@TokyoOffroad]

@@philipsmith6152 Typically a 0.6mm base gasket will result in a 0mm deck height

[@philipsmith6152]

Thanks 👍@@TokyoOffroad

[@miro_s]

thanks for this. How do you compare TPI and TBI having deep knowledge of both? Cheers.

[@TokyoOffroad]

I prefer the 2024 TBI 300 EXC performance (specifically bottom end power) over TPI. I find it easier to ride. Power with the TSP Power kit installed is linear and pulls well bottom through top end.

[@bshalek]

did you go through the trouble of measuring the squish clearance? Ty for the vid!

[@TokyoOffroad]

The squish measurements I gave in the video (Stock=1.8mm; TSP Med Comp=1.0mm) were taken by measuring the squish band of the head (I used a depth gauge). The actual squish clearance (distance between the head and piston in the squish region) will be dependent on the cylinder deck height. Typically I aim for a deck height of 0mm (piston top is flush with cylinder) and in my experience is how these bikes are setup by KTM in the factory.

[@bshalek]

@@TokyoOffroadthank you! And love the vids - cheers!

[@axelav5]

Does the o-ring at the top of the TSP insert need to replaced when you change the top end?

[@TokyoOffroad]

Yes, I think it’s a good idea to replace the insert o-ring every top end overhaul. Cheap insurance to help minimize any issues…

[@axelav5]

Yes that makes sense. Does the kit come with any extras or info on the size so they are easy to source?

[@EricNeilson_]

Do you know if the stock head has a tolerance for warpage? I can slide a 0.0015 inch feeler gauge under one side of it when it's on a flat surface. 0.002 inch will not go. 0.038 mm equivalent. My head looked just like yours when I took it off at the 200 hour mark in my TPI. More buildup towards the exhaust port. Just not sure if it's warped on that side (which is where the feeler gauge goes in, only that side).

[@TokyoOffroad]

Yes, the specification (cylinder/cylinder head- distortion of sealing surface) is

[@shaneburesh9173]

The only thing holding me back is that I do not want to cause premature crank/engine failure. What are your thoughts on how this mod will affect the longevity of the bike?

[@TokyoOffroad]

I've been running an RK Tek head on my 2017 KTM 300 for over 550H. I did do a bottom end overhaul at 450H, but it didn't really need it. I think it would've been fine util 600H or more. I do a top end overhaul every 150H on the carb bike. The 2024 TBI (which I deleted the oil injection) I'll probably do a similar interval, unless it clearly need it earlier. For my use it hasn't been an issue. But always follow the head supplier's recommendation regarding elevation, compression, engine tune and fuel octane.

[@shaneburesh9173]

@@TokyoOffroad thank you.

[@aaronphillips2728]

I think im missing my outer o ring . The kit sidnt come with it . Edit: nvm it was folding up and looked small...but its not wanting to hold into place

[@TokyoOffroad]

To hold the oring in place during assembly a small amount of silicone grease can be used.

[@grutzmac]

What elevation are you measuring this at? And riding. Thx!

[@TokyoOffroad]

I did mention in the video that I did the measurement at 25m above sea level. I typically ride sea level up to about 1,500m

[@TheCalMak]

I’ve just fitted this kit to my 24 300 TBI and now the bike won’t start. I don’t have the erm just had the ecu mapped by tsp. Im not getting a spark and have tested several plugs earthed against the head. The battery is weak though as I think the trickle charger I was using is a dud! Have you any ideas?

[@TokyoOffroad]

Yes, charge the battery. Also make sure the fuel connector is pushed together fully and the fuel tank electrical connector is plugged in correctly. My understanding is that if you don't have the spark plug installed, you won't get compression and the ECU will not spark the spark plug (crankcase pressure measured using the CCPS). Although I haven't tried checking for spark on my 2024 so could be wrong about this.

[@TheCalMak]

I had a plug in for compression and there was still no spark. Tried a different kill switch double checked everything so it’s pointing to a faulty map atm. On comms with tsp about it now.

[@johnnyMDREI]

@@TheCalMak Did you resolve? What was the problem?

[@Backhurtsbad]

What mixture oil do you use?

[@TokyoOffroad]

I use 60:1, high octane pump gasoline with Motorex Crosspower 2T

[@Backhurtsbad]

Thank you, always had great results with Motorex? @@TokyoOffroad

[@adambatchelder4121]

Wow 40 though squish seams tight for pump gas

[@ИлиянИлиев-б1и]

install tsp on my ktm 300 2024 medium compression head and last tsp software but problem 5000-6000rpm riding strange knock noise

[@TokyoOffroad]

Sorry to hear that. What octane gasoline are you using? I use high octane pump gasoline (100 RON) and haven't experienced any knocking during my riding (sea level to about 1500m). If you have the ERM you could try richening the fueling in that rpm range and see how it responds. If you don't have access to high octane gasoline and can't adjust the fueling then my suggestion would be to try the stock head (which is a little lower compression than the TSP medium comp head) with the TSP tune and see if the knocking goes away.

[@TokyoOffroad]

I've just seen that there is an updated TSP map on the TSP ERM website (3BE-24-J, 16 April 2024), which may help with engine knock if you're using an older version. The version notes state: "This is the latest tune for the 2024 300EXC (XC-W). This tune has changes to the Green map compared to the previous 3BE-24-I tune. The changes involve adjustments to fuel, ignition and powervalve at low throttle and mid/high revs to reduce the engine knock that is experienced on some bikes in this zone. The Green map is the aggressive/tuned map. The White map is softer with more fuel, less ignition advance, slower powervalve opening and is better suited to hard enduro or slower technical riding. Can be used with the stock pipe and silencer or the FMF Fatty pipe. IMPORTANT: Set TPS to 0.40v with both red and yellow adjusters backed all the way out." I'm still using the previous version, 3BE-24-I and haven't experienced any knocking, but will upgrade to the latest version anyway to see how it changes.

[@ИлиянИлиев-б1и]

@@TokyoOffroad yes, I'm with the newest one, I tried it with the old one, it's the same, I even tried it and the original one still does this. I found another colleague's topic and he with the same problem said that with 98 octane the problem was solved. I will try and write!

[@TokyoOffroad]

@@ИлиянИлиев-б1и - Yes, higher octane fuel should help…

[@outfitr9703]

Too bad we still have to spend a bunch of money on these new bikes. I'll just keep riding my well set up '18.

[@TokyoOffroad]

I think the 2024 KTM 300 is the best stock KTM off-road bike ever. Engine and suspension performance is much better than the TPI bikes IMO. But is it perfect? No, of course not, which is why I'm spending some time and money to improve it further...

[@romanhrynyshyn4246]

Nobody force you to spend additional money on the new bike, it's already great enough out of the box

[@onthethrottle7104]

Do you need to spend money on a great bike. No, but he has a great channel that he's building and the best way to do that is to install different things that have been proven to be exceptional on the market and then report back to his audience like they are there with him. I have the same bike, am an A class rider, and have done nothing to the bike except install a fan (which really don't need) Mousse bib in front an Tubliss in rear. Just because owners spend money on their bikes absolutely does not mean they require it...

[@outfitr9703]

@onthethrottle7104 Geez guys, I wasn't knocking the channel, love the channel and the effort put in to provide good technical information. I'm a subscriber and purchased parts also. As good as the 24 bike is I was just hoping it would be better that's all. I can't leave things alone and I know I'd have to have a head and tuner. Just like I did on my 18 with a head and carb. It now runs flawless. Just saying, it would be nice if they ran perfect from the get go. Someday.

[@onthethrottle7104]

@@outfitr9703 You got it outfitr - thanks for clarifying and it looks like you and I are on the same page. That said, what is it that you would like to see better on the 24 XCW? I agree nothing is perfect don't get me wrong. I'm interested though on what others think. Again, thanks for replying to me I appreciate that.

[@Hendy711]

What oil delete kit did you use? I emailed you and I believe you recommended using the TSP kit for the TPI? Is that correct?

[@TokyoOffroad]

Yes, I’m using the TSP resistor dongle included in the TPI oil delete kit. It works great

[@Hendy711]

@@TokyoOffroad Awesome thanks!

[@akboun6708]

210 psi for stock tbi? That's a lot, i think the stock tpi is between 175-180 and thought tbi was lower 😮

[@TokyoOffroad]

Yes, I was surprised at how high the compression is with the stock head. I was expecting it to be lower.

[@geodez]

Almost the same thing. Money is wasted )

[@TokyoOffroad]

The shape is very different. Not the same at all. Stock squish is 1.8mm, TSP squish is 1.0mm. That's a big difference...

[@geodez]

ок@@TokyoOffroad

[@jengel451]

Compression is only part of the equation. Flame propagation will be much better with the new head. Efficiency equals power.

[@mihaidobrescu7430]

​@@TokyoOffroadnot so different than a good 1mm squish.

[@gafrers]

@@jengel451 Source of your claims?

[@jamesoso259]

Honestly heads on two stokes are a bit of propaganda.

[@TokyoOffroad]

Why’s that? On other bikes I’ve had, which I changed to RK Tek heads, there was a very noticeable improvement in power. I think the same will be true of this mod…

[@jamesoso259]

@@TokyoOffroad sure power increases but that’s not always something that’s better. I’d say the magic is more in the fueling or porting than anything

[@TokyoOffroad]

@@jamesoso259 In my experience it's a combination of all those things and more (expansion pipe design, intake, power valve)... But you're right, more power isn't always a good thing. That one reason I selected the TSP medium compression head, rather the the high compression head as I think it'll suit my riding and ability better. Just about to flash the TSP map to my ECU which should make a big difference. Can't wait to ride it tomorrow 🙂

[@MOTOSUDETY]

@@TokyoOffroad I also chose the medium head for TE 300 2024