i own an 04 cbr 600 f4i with power commander. just got a chance to ride again after almost 2 weeks of not riding. after 20-25 mins of riding i started doing power wheelies. weird thing 1st one had no problem, everyone after... as soon as the wheel was up the bike started bucking, now while on 2 wheels under full throttle i had no bucking at all??? whats going on here? cant be the cutch, something messing with my air fuel ratio?

 

The BAS needs to be bypassed. Thats my guess....

You may want to over fill the oil little bit. Poping up the front can keep oil from the pickup and starve the motor.

 

now i bought this bike with work done to it already so it might already be bypassed. the reason i think this is because ive done plenty of wheelies with the bike before and this is the first im havin a problem. thoughts?

 

Maybe the fuel is not getting picked up by the pump when its up. Other that those things, I have no idea.