Category Snowmobile/YamahaYamaha - Snowmobile Piston Kits Back Piston Ring R09-815 Snowmobile Parts & Accessories Type: STD 01 (0.25) 02 (0.50) 03 (0.75) 04 (1.00) Viewer:131 Item No: R09-815 Fits with Piston 09-815 Fits: 1975-1974 YAMAHA GPX 338 F/A You May Also Be Interested In Piston Kit 09-807 Piston Ring R09-811 Bearing 31-61100A1 Upper Gear Set 43-18410A4