04 yz450f motor problems
Posted December 27, 2010 - 10:43 AM
Posted December 27, 2010 - 11:13 AM
Posted December 27, 2010 - 04:27 PM
Thanks for the reply it was much appreciated
Posted December 28, 2010 - 07:07 AM
As far as cracked pistons, if it was a stock piston I have seen extended use or "time" as a factor in pistons cracking. Other then that detonation can cause a piston to crack. Can you post pictures of the piston and these messed up valves?