Category Snowmobile/Ski DooSki Doo - Snowmobile Piston Kits Back Piston Ring R09-769 Snowmobile Parts & Accessories Type: STD 01 (0.25) 02 (0.50) 03 (0.75) 04 (1.00) Viewer:111 Item No: R09-769 Fits on Piston Kit 09-769 Fits: 1979-1977 Ski Doo Futura 400, E You May Also Be Interested In Piston Kit 09-783 Piston Kit 09-777 Piston Kit 09-665 STD Piston Kit 09-785