Home Forums Shifter Karts What did I do wrong? Reply To: What did I do wrong?


Matt Martin

Thanks, William.

There was about a 5mm section of the ring missing.  The locating pin was still in place, however.

I’m trying to figure out if the damage came from the hunk of piston/ring that departed, or maybe debris from elsewhere.  The big end seems all there, and I do run an airbox and filter.

I’ve read a few reports of coolant getting into the cylinder and thermally shocking the piston and leading to a crack, but i didn’t see any signs of where coolant might come through.