Category Snowmobile/Ski DooSki Doo - Snowmobile Piston Kits Back Piston Kit 09-763 Snowmobile Parts & Accessories Type: STD 01 (0.25) 02 (0.50) 03 (0.75) 04 (1.00) Viewer:825 Item No: 09-763 OEM No: 420-9944-65 Size: Right Fits: 1982, 1978, 1975, Ski Doo Alpine 1981-1976 Alpine 640ER You May Also Be Interested In Piston Ring R09-780 Piston Ring R09-754 Gear Set 43-75325A3 Top End Gasket Kit 66V-W0001-TG-SST