[abhijitz]

Bottom end, i think is gone. Misses shifts left & right. Retainer spring is Ok ... I would like to split the cases and inspect the transmission.

I can use this motor as the guinea pig if you want, i have a spare 2012 motor to which i can transfer the current head which is milled.

I need to learn but under a watchful pair of experienced eyes

Originally Posted by rojoracing53

Yeah I've rebuilt the top end of my 4 stroke dirt bike but that as far as I've gone. I could figure out the ninja 250 no problem I think I wouldn't feel right learning on your bike. I'd be more up to the challenge after I rebuild my 250s motor but I hope it last me quite a bit longer.

Why do you need your motor rebuilt?