I have a 954 that won't accelerate past 8-9k rpm when the throttle is fully open in first gear. That limit decreases as I go up in gears. No codes or engine light. I can creep up to 10k rpm when I slowly accelerate. I’ve tried new spark plugs, coils, fuel rail, injectors, cleaning the air filter and sea foam. The throttle body is clean and opens fully with throttle… cables work as they should. My guess could be fuel pump or maf sensor. Any ideas?

 

Sprocket ratios incorrect?

 

 

OK man, I just went through this whole thing with mine couldn’t figure it out for the life of me then I finally went to the ECU . My ECU wasn’t even working couldn’t get the bike to run properly after replacing the ECU aligning it properly my bike runs awesome thanks hope everything works out for you guys