WELL I WAS RIDING A LITTLE HARD THREE WEEKS AGO AND I MISSED A GEAR. WELL I THOUGHT I FLOATED THE PISTON AND IT HIT THE PLUG. NOT THE CASE I PUT A NEW PLUG IN IT DROVE ABOUT 150 MILES AND THEN IT SOUNDED LIKE ALL HELL BROKE LOOSE IN THE MOTOR. I TOOK IT OVER TO THE DEALER AND THEY TOOK THE TOP HALF OFF. WELL THEY CALLED ME AND SAID YOU HAVE TO COME LOOK AT THIS RIGHT AWAY. WHEN I GOT THERE THEY SHOWED ME A BROKE PISTON AND A WHOLE LOT OF BROKEN PIECES OF PISTON RING STICKING OUT OF THE HEADS. SO I WANTED TO KNOW MY OPTIONS AND 2500 DOLLARS LATER I HAVE A LOT MORE ENGINE. HE TOLD ME I WILL PROBABLLY BE PUSHING 1335-1350 CCs. SO LONG STORY SHORT YOU MISS A GEAR IT MAY COST 2500.