Product SnowmobilePiston Back 09-807 Piston Kit For Yamaha Piston Kit 09-807 Type: Standard (STD) 01 (0.25) 02 (0.50) 03 (0.75) 04 (1.00) Item Number: 09-807 Description: Piston Kit, Bore 66mm You May Also Be Interested In 09-604 Piston Kit For Arctic Cat 09-742 Piston Kit For Ski-Doo P400250900067 Complete Gasket Kit W/Oil Seals For Kawasaki P400270850061 Complete Gasket Kit For KTM