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Discussion Starter · #1 ·
I just got the 2021 R9T in March and have spend tons of time on which slip on can fit the new version which is EURO 5. I really want to install the SC project CRT dual but I emailed the SC project and they said they are not sure if it would work on the 2021 version and they would not make newer version anymore. I called two dealers, one in California and one in Iowa. They said if I need to replace the exhaust I have to replace the full system, or I can go the Akrapovic one. They are not sure about the fitment of SC project neither.

Could anyone tell me if I can install the CRT dual on the bike? Is there anything on exhaust different compared to the previous model? Thank you.
 

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Discussion Starter · #2 ·
I got the email from motowheels for "In most cases, the silencers don’t get affected with the Euro 5 spec bikes and rather it is the cat and the headers that are different. It is interesting where the slip-on portion of the OEM exhaust is also being different for the new model." (this is something I am not sure because the part manager in California told me the part number for slip-on is different between 2021 and previous).

"We know it is suitable for Euro 3 and Euro 4 model, will have information on Euro 5 bike as soon as customer will report it. Will not develop product for this bike." this is from sc project's reply
 

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R Nine T, 2019, Black Storm Metallic
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The standard Euro 5 exhaust muffler for the R nine t looks identical from every angle to the Euro 3 and 4 one. Therefore I don't see any issue with fitting a slip on muffler such as the CRT to your bike. The most significant change to the exhaust for 2021 is the additional O2 sensor after your cat but this is on your header pipes not your muffler.

The ECU will have no way of 'knowing' that you have changed the muffler. So there won't be any error codes.

Safest option is to try and buy a muffler with a returns policy!
 

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Discussion Starter · #4 · (Edited by Moderator)
Fantastic thanks, I will place an order on Moto-Madness because they are the only shop who has a returns policy although they would charge a 15% restock fee.

I mean has a return policy on the CRT mufflers.
 

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R nine T 2021
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On my Rninet euro5 I installed a slip-on from Ac Schnitzer model euro4 and it wouldn’t fit on the cat.
The diameter from the end of the cat is 65mm(outside), the slip-on was 64mm(inside) if I remember correctly.
I went to an exhaust specialist. He used a hydraulic press to widen the connector of the link pipe.
 

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2021 Rninet Pure Mineral Gray Metallic
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I ran into the same issue with my recent purchased Competition Werke exhaust tip. They said for 2021 the diameter is slightly bigger and can be expanded to fit. The difference is very small. They offered either a full refund or a free expansion to make it fit If I wanted for the cost of shipping. They were very nice and professional on the phone. They mentioned someone already ran into the same problem and the small expansion solved it. They also said that when they have the time they will bring a 2021 Rninet to make the proper part going forward but at the moment they were too busy.
 

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R Nine T, 2019, Black Storm Metallic
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I stand corrected! How strange they decided to make such a minor change...
 

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2021 Rninet Pure Mineral Gray Metallic
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I stand corrected! How strange they decided to make such a minor change...
Yeah I’m not sure why. But little changes can be big headaches for some of us. Also, the air filter is different as well. I tried putting a K&N and the 2016-2020 was about 20% smaller. The position of the filter is also a little different. I helped a friend put one on his 2017 model.
 
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