The piston shattered while it was under normal load.The exhaust side of the piston just disintegrated--some piston trash (pieces) went into the crankcase.It never locked up but there are two small nicks on the crank,which leads me to believe the rod may be bent.The head and the cylinder are fine.But I have to spit the cases to clean out the piston trash so I was going to have a new rod installed while I was there.I have always run a 40to1 mixture and I know the history of the bike so I am sure it was always taken care of.Thats why I asked about cranks and people associated with them. Since then I have read all the post in the two cycle section and I think I have a directiom to go==Thanks for asking Greg
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