Hi all, I have just picked up a 2015 KTM RC 390. It starts and runs well. It will die if you leave it idling for a few minutes but that doesn't bother me too much. Problem is when I gradually accelerate it get stuck at around 5000rpm and struggles to pull. It eventually gets past the blip and revs fine all the way up. Also if thrashing it, it will hardly be noticeable. Definite problem but wondered if anyone knows where to start. It had a k&n filter and tyga twin pipes on which i have now removed and put it back to standard. Also fault code says 45, o2 sensor, which wasn't there last time i rode it but the bike still had the blip. So i don't think that is the problem. Any advise would be great. Thanks in advance.
