Originally Posted by
blown sv
i would change them, for what ceramics cost its worth it, the motor is much smoother and pulls out of corners better, and also you will get alot more reliability out of it, since ive had sirio ceramic bearings in all my sirios the bearing maintenance has halved if not more
Thank you for your help...I have just buy sirio ceramic ball bearings and a new conrod..

I have only one question...When i opened the engine i saw the cranksaft a little black is this a problem..?