Yamaha Motor Co., Ltd. 846-11611-00-00 Piston Ring

The Yamaha 846-11611-00-00 Piston Ring is a compression ring that seals the combustion chamber and controls oil distribution in snowmobile piston-and-cylinder assemblies. This genuine Yamaha OEM replacement part is commonly used in vintage models such as EX340, EX440, and GP338, installed during top-end rebuilds to restore compression and engine durability. Specifications: Part Number 846-11611-00-00; ring type compression ring (standard size); material hardened steel or cast iron alloy; fits piston grooves within the cylinder assembly for Yamaha snowmobile engines in the EX340/EX440/GP338 family and similar models.