hi i have a 87 banshee i just rebuilt new crank, board .20 over wiseco pistons, fmf fatty pipe ,boyesen reeds,stage 3 fmf carb kit, k&n air filters. it might of had 4 hours on it. i went ice racing and about 8 laps into it i blew it up. took it apart and there was a hole in one piston and some shavings went into the crank case so im woundering what to do, i have a wsm big bore kit with 70.5 pistons but what else would i have to do to the motor , any other performance suggestion would be helpfull. thanks ty