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:135 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 09-803 Piston Ring R09-811 Complete Gasket Kit HS-711310 Oil Seal 290-930-580