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:244 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 Ring R09-754 Piston Ring R09-752 Complete Gasket Kit HS-711063C Top End Gasket Kit PWKA-01100-TG