HEY GUYS ARE YOU RUNNING YOUR SLED IN ETHANOL OR REGULAR, JUST GOT MY SLED BACK YESTERDAY FROM THE DEALER,GOT ALL THE UPDATES DONE, ASK HIM TO TAKE Y PIPE OFF TO CHECK PISTONS SURE ENOUGH I SCORED THE MAG SIDE PISTON, HE SAID I SHOULD BE RUNNING IT IN ETHANOL MODE AND I THINK THATS BULLS**T , I HAD A 2000 ZR 600EFI LAST YEAR AND NEVER HAD TO RUN IT IN ETHANOL MODE. HAS ANY ONE ELSE SCORED A PISTON YET AND DID IT LOOSE A LOT OF POWER. THANKS