Second topend rebuild obviously "honed" it to much with three blade spring honer. Shoulda gone larger on piston bc it showed signs of blow by. Any way I put a standered size piston back in it. Had great high rpm power but not much low end off the pipe power. Lot of clutch slipin to get in power band. After about three rides it would make a marble rattle kinda sound. I tried to make it home but did not. So I tear into it and the intake side piston skirt was gone. Can't find anylarge pieces but lots of gritty sandy chunks.
I'm almost for sure the cylinder was honed way to much and was causing the piston to rattle around and shatter. Now the head has cuts gouges and looked like shroud metal was buckshot into it. The rod has zero up down movement but does kinda giggle side to side. The crank will rotate freely and had no sighns of shroud metal damage. But it does have the gritty sandy aluminum oil all in the crank. Obviously I need a larger pistonand rings. Obviously I should take the head and cylinder and a new piston to a machine shop to clean this up and bore it to corect tolerance. Should I get. 20 over or go with.30? Also what the hell do I need to do to the crankcase to get it ready for a new machined topend?
I'm almost for sure the cylinder was honed way to much and was causing the piston to rattle around and shatter. Now the head has cuts gouges and looked like shroud metal was buckshot into it. The rod has zero up down movement but does kinda giggle side to side. The crank will rotate freely and had no sighns of shroud metal damage. But it does have the gritty sandy aluminum oil all in the crank. Obviously I need a larger pistonand rings. Obviously I should take the head and cylinder and a new piston to a machine shop to clean this up and bore it to corect tolerance. Should I get. 20 over or go with.30? Also what the hell do I need to do to the crankcase to get it ready for a new machined topend?