I run on 92 an have no problems with it I don't know what the compersion is but could tell the diffance when I went to pull start it.Right now I have 4year on the stock piston one year just riding on the trails an 3 years racing.

 

what exactly is shaving your head??? i most likely will have to put a weisco in pretty soon anyway.

 

It riases the compersion up buy take some of the gap away from the piston to the head. All I did was take it off an droped it of at an auto parts store that has a machine shop an told them to take .020 off.

 

Ron-

I ride in the Winston Salem NC area but, lately a lot of the places I ride have been posted. Currently my ATV's have been sitting on the trailer for a month+ but, I am hoping to get out this next weekend.