KTM RC 390 Ownership Experience

Hello everyone! How you all are doing? I had one question.. I'm getting an aftermarket exhaust for my RC 390 (will take 45 days, so will review it later). So, someone said me to have an air filter also. Currently I'm on the stock air filter with Powertronic piggyback. So guys, just wanted to know whether an air filter would make the engine run Lean (without a remap)? I'm asking it because the RD guys said you will have to come to Bangalore and I can't go there as it is too far from Gwalior (MP). So now, whether should I install an air filter or not? If yes, then which one? and what about the remap then?
They told me that I can make changes in the default maps that they provided me but I'm not that good in these things.. Hope you all will give your suggestions and help me solve my problem.
Thanking you
Aman

Re: KTM RC 390 Ownership Experience


You'll know when you hit the limiter, trust me. Its very abrupt and hard on the 390s, the bikes just stops revving any further - in a hard manner.

RPM1 is when the shift indicator starts blinking. RPM2 is when it stays lit.

Re: KTM RC 390 Ownership Experience

At what rpm does, the rev limiter is set??

Re: KTM RC 390 Ownership Experience

My duke hits the limiter at 10,000. I don't know if the RC ECU has a different limiter.

Re: KTM RC 390 Ownership Experience

Mine hits at 9500.

Re: KTM RC 390 Ownership Experience

Thanks a lot.I didnt know about it :-)

Re: KTM RC 390 Ownership Experience

RPM 2 (also Rev limit) in the bike is 10,500.

Re: KTM RC 390 Ownership Experience

RC has 10.5k.

Re: KTM RC 390 Ownership Experience

Okay, so I just got confused about all these different opinions and went out to check my rev limiter. It kicks in at 10,500. So my first post is wrong. I never really tried to look at what RPM the limiter kicks in at. Also, the RPM2 has nothing to do with the rev limiter.

KTM RC 390 Ownership Experience

[emoji106]🏼
Now can I anyone solve my problem? [emoji23]

Re: KTM RC 390 Ownership Experience



Okay, so your exhaust is going to significantly improve it's ability to push out the exhaust gases. But without more air coming in, this new found ability seems moot. There will be a definite change in the engine's character even without the filter change, but to get yours money's worth, it is advised to get a filter to improve the intake as well.



As for the retuning bit, I'd ask you this, you spent a good 15k on the piggyback unit and it's map. Then you are spending on this new exhaust and maybe a filter as well. But what is the point if you aren't remapping the ECU? You spend all that money and get only a fraction of what you could. The whole point of having a piggyback unit is to improve on the stock mapping and also compensate for what ever air flow changes you introduce with performance mods.



So, if you change the filter, your bike will be lean. There will be a possible loss of top-end with the new exhaust. Being a closed loop FI system, it will compensate on it's own to an extend (but there is only so much these narrow range sensors can compensate for). But that is when the stock ECU has free reign. Adding the piggyback unit changes things. From the way a piggyback unit works, i don't know for sure if those compensations wouldn't be ignored by the piggyback map.



At the end, its your decision. My advice would be to go for a remap. If you are getting a custom exhaust then you will need a fresh dyno tuning. But if it is an exhaust available in the market, try asking RaceDynamics to provide a map used on a bike that had the same exhaust system.

Re: KTM RC 390 Ownership Experience

Thank you. If any questions, I'll ask. Thank you once again.

Re: KTM RC 390 Ownership Experience

So do they change this @first service. Because Mine is 9500.

KTM RC 390 Ownership Experience

I don't know as here when I got the bike they didn't do anything but only the servicing. Preferably I don't think they do (as far as I know). Is your rev limit 9.5k? Or the rpm2 indicator? Check that out first.

Re: KTM RC 390 Ownership Experience

The rev limiter is set @9500 rpm not the shift 2 light.