Aprilia RS660 exhaust modification

[@Akshay_sai.369]

Genius no need of after market exhaust. We can tune stock exhaust the way we want ❤

[@knekt75]

And it's relative simple and especially cheap modification. I paid about 100€ for the welding and that's it..

[@jacquesartus9643]

idk how to say it proper but i am scared like u need to remap the aftermarket once maybe also here

[@ifarewelli]

Genius way to fuck the bike... just read for 5mins online

[@joshholt3279]

I literally spent 6 hrs doing this mod this past Saturday. It wasn't hard really, you're right, it is time consuming. The result was "ok". I really wish I had de-cat'd it now. If you have basic tools and a welder, it's worth doing, But I would recommend pulling the cat out too if you want that really aggressive sound. Also have someone with small hands help with the nuts on the exhaust studs on the head.

[@knekt75]

Thanks for your input! I also think the result was ok, or maybe a bit more than ok. Soundwise, I was hoping for deeper rumble, but instead settled for the sporty sound. Regarding de-catting the system, I'm still thinking that _maybe_ I should have gone "all in" and just deleted that damn thing. But still, I'm happy with the current result... And those header nuts, they are a bitch for sure :)

[@Noname-rb7qp]

If you de-cat it you need a Race Mapping or you get some real Problems with the motor 😵‍💫😵‍💫

[@ziggles_moto]

That's sick! Definitely a bit more growl. Can you do an onboard sound demo and a flyby/street demo, please!

[@knekt75]

Thanks! Yeah, a bit more growl for sure, but I wouldn't mind a more deeper growl. It's winter in Sweden, but I might post a flyby when the weather has improved.

[@martinwhy5122]

👍🏻

[@Noname-rb7qp]

Pls do it🙏🙏​@@knekt75

[@drive_low]

neuigkeiten?

[@danitasconesrios1678]

Hi, thanks for the help. I was looking for the best way to maintain the stock look with good sound. Could you tell me if I also remove the catalytic converter and your modifications, will there be an electrical failure?

[@knekt75]

@@danitasconesrios1678 No electronic failures if you also remove the cat, but it is recommended that you upgrade the ECU, either with Upmap or Aprilia race ecu.

[@danitasconesrios1678]

@@knekt75 Thanks, I am in doubt since the mivv exhaust and most are direct lines removing the catalyst and obviously the owners do not reprogram for an exhaust I will try to do the same as you by removing the cat

[@MazzolaRiccardo]

Bravissimo. Io sto facendo uguale. Grazie.

[@alesanto8922]

Com'è uscito?

[@MazzolaRiccardo]

@@alesanto8922 perfetto. Magari ora che me lo chiedi ci faccio un video e lo pubblico.

[@alessandro445]

@@MazzolaRiccardohai avuto problemi per quanto riguarda l’erogazione? Da quanto ho capito il catalizzatore rimane quindi non dovrebbe essere necessario rimappare

[@jonsiberia393]

Hi, and thanks for posting this, it is very helpful. Do you happen to know if what type done is similar or the same as motoboxusa sport plus? I've done mine and was wondering if you've installed any tune and if so, how does it feel? Thanks, Jon( uk)

[@knekt75]

Hi.. Sorry, I have no idea how the Motobox configurations look internally, and I never installed a tune. My plan was to keep the modification modest so that I did'nt have to upgrade the ECU...

[@erikspekla7612]

What about the power and torque? Better, worse or the same?

[@knekt75]

@@erikspekla7612 The same. I haven't noticed any difference at all.

[@eladlevi9607]

is it like the MOTOBOX sport / sport plus / race ??

[@knekt75]

@@eladlevi9607 I don't know anything about the Motobox alternatives, haven't seen nor heard them irl. But guessing similar to sport or sport plus...

[@eladlevi9607]

@@knekt75yea I was guessing that also, but what more could you do to make it even better?

[@knekt75]

@@eladlevi9607 I've been asking myself the same question. In my opinion, a deeper rumble in the sound would be better, but I don't know how to achieve that. Maybe by removing the cat, maybe by making the outlet pipes diameter bigger? I just went with a simple modification without doing any research and testing..

[@Wolfdgt]

Does the modification exceed the sound norms ? I believe that it is around 85db at 50% of the engine

[@knekt75]

Sorry, I'm not aware of any sound norms. But in the current state it's over 100 db at 6000 rpm, which could be too much I guess. However, I had zero complaints and personally I don't think it's too loud. There are so many louder bikes out there...

[@Wolfdgt]

@knekt75 that's true Then thank you for your presentation ! I'll try it on mine and if it's bad there some stock exhaust on Leboncoin and others

[@knekt75]

@@Wolfdgt Yeah, there are plenty of exhausts on the used market. Go for it.. :)

[@Wolfdgt]

​@knekt75 had you taken the radiator out to pull out the exhaust ?

[@knekt75]

​@@WolfdgtNo, I only removed the 4 bolts and kept the radiator hanging in the coolant hoses. This will give enough clearance to remove the header nuts 👍

[@urboostd4865]

Stockholm? Vem lämnade du isåfall in de till för svets?

[@knekt75]

Svetsningen utfördes av en mekanisk firma i Stockholm. Firman gör flera jobb åt mig i tjänsten och gjorde svetsningen som en vänlig gest. Det var en engångsföreteelse och de utför egentligen inte sådana här jobb på daglig basis..

[@knekt75]

@urboostd4865 www.hofmeijer.se/

[@omass]

Grymt tips, blir till o göra detta i helgen :)

[@MikeC-r9c]

are you going to dyno this modification to see horse power increase?

[@knekt75]

No, i'm not and no plans of updating the ecu. The purpose of this mod was only sound. If there are any gains in hp its just a bonus.

[@thereddrob]

does this result in less back pressure since you are removing bends and restrictions?

[@knekt75]

Maybe some loss of back pressure in the system, but there still is a cat and minor pipes in there so its not a totally free flowing system. I havent noticed any loss of power...

[@mahanghorbani523]

Hi. If the catalytic converter is still there, was those muffler that you removed? Btw, I'm the guy from Facebook that replied to your comment.

[@knekt75]

Yes, the cat is still in there. The exhaust is basically made in three different chambers. When removing these pipes and blocking the holes, the exhaust only goes through one chamber (instead of three chambers).

[@mahanghorbani523]

@knekt75 what those holes represent? I'm a bit confused. And by the way, how thick the metal blocker should be in order not to get melted completely when welding.

[@knekt75]

@@mahanghorbani523 This video wasn't really meant to be a tutorial, but here's a better overview... kzbin.info/www/bejne/gnvMdaGvbN6LapY I think the metal blocks were only 1 mm in thickness. Any good welder can do this.

[@mahanghorbani523]

​@knekt75 ah that answer why only 3 holes is blocked. But could you say what thsoe 2 pipe and that one hole represents? Thanks a lot in advance

[@knekt75]

@@mahanghorbani523 they are only access for the exhaust gases between the three chambers in the muffler.

[@paolofraietta9473]

Is it necessary to remap?

[@knekt75]

I don't think so. This modification is quite modest and the cat is still in there.

[@STRAZZ]

planning to remove the catalytic is it really loud with it ?

[@knekt75]

No, in the current setup, it's not too loud.

[@STRAZZ]

@@knekt75 will try to remove the catalytic then and lyk

[@knekt75]

​@@STRAZZcool.. keep in mind that if you remove the cat you most likely need an ecu tune. Good luck 👍

[@phylax8]

Hey. Im currently not in the same place where my bike is. (I have a 2023 tuono 660) I did the same as in the video and also drilled out the catalytic converter. (I kept the so called pipe that held all the metal so it doesn't go through any other chamber). In a week when i get back i could send you an audio if you'd like to compare them. I also have photos of the process if you need them.

[@STRAZZ]

@@phylax8hi, yes absolutely do you have instagram ?