spzany

I stunt a 1999 cbr 600 f4 and my bike just started breaking up around 5,000 rpms, ill be up on one and it seems like its misfireing and it will slam down. It just started doing this about a week ago riding some corners. Also my rear sprocket is super striped out (it could be the chain jumping the sprocket) but im almost positive its the motor. I just replaced the air filter and realized that the ram air ducts were not in the airbox so i fixed that and it still runs the same. Can somebody point me in the right direction? thanks.

2 fancy.

Mikie

Make sure your spark plug wires are snapped onto the plugs snuggly. Check the airbox and carbs to make sure they are tightnened down also.

If you chain isnt adj correctly you will prematurely wear out the sprockets as you describe, so check that.

Good luck

rrmike

Get new sprockets first since you need those anyway then see if it's better.

DLISH

look for disconected air tubes around the carbs/airbox