so how much are 20 over pistons, i think my rings are bad, the thing doesn't want to idle anymore and the crankcase breather is a'huffin bad......

 

you try adjusting the valves?

 

well, i checked the valves tonight, they're fine, and ya know i was also messing with the little clutch adjuster nut on the side of the case and i could make the knock go away.......so i think the problem is in the tranny??? any thoughts???