Looking for the cause of this meltdown. I rode 150 miles the day this happened. Sled was running great. I tore the motor down and have not found anything that may have caused this. Carb, carb boot, reeds, crank seal, power valve, all good. What is the purpose of the machined hole on the intake side of the piston? Pic 1 is exhaust side.
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no1chevyboy
New member
do you have close ups of all sides of the piston? how were you running when i quit? looks like you ran it for awhile like this. what do other cylinders look like?