Re: New stage 2 stuck at crankshaft
well, it is not any of the needle bearings as they always make tiny circular holes
whatever it was looks to have been soft as it seems to have broken up or smashed flatter when it hit
there might be more info in a pic of the ports & piston skirt to show where it entered
could be flashing from a port left after machining, or could be something that fell in before spark plug was in place (had a customer drop a lock washer from gas tank mount and it went right in the plug hole - locked up in 2 seconds and destroyed cylinder & piston both)
Sometimes I sets and thinks, sometimes I jes sets.