cr 125 powervalve question

[mattsteibler26]

Hey i have a 1998 honda cr 125 with the HPP engine. I got the bike with low compression and i took it apart to see it was because the powervalves were hitting the piston. Do i have to shave the powervalves or what do i have to do to make sure this doesnt happen again when i rebuild the top end

 

[Budget_Blaster]

Not a honda expert but shaving power valves dont sound like a hot idea.

How far did you tear it down?

Pics will help alot!!!

 

[yzrider]

hmm, seems like a prob that occurs with cr's sometimes, what year is it? from what i read, some years required some shaving of the powervalve when it was bored over, your rings are prolly toast, maybe the piston too, normally when the powervalve hits it destroys the rings

 

[yzrider]

might be helpful Dan's Motorcycle "Power Valves"