Parts Unlimited R09-785-2 Piston Ring Set Oversize - 3.012in 0.020

The Parts Unlimited R09-785-2 is a precision-engineered piston ring set designed for snowmobile two-stroke engines. This oversize ring set features a +0.020" bore specification with a 3.012-inch (76.50mm) diameter, making it ideal for engine rebuilds that require slightly oversized components due to cylinder wear or boring.

Key Features:

• Oversize specification: +0.020 inch for rebored cylinders
• Bore diameter: 3.012 inches (76.50mm)
• Complete ring set for one piston replacement
• Engineered for optimal heat transfer from combustion chamber to cylinder walls
• OEM-interchangeable quality construction
• Designed for 597cc twin-cylinder snowmobile engines

This ring set is commonly used in Ski-Doo 600 Twin snowmobile applications (non-HO models) and provides reliable sealing performance for rebuilt engines. Each set includes all necessary rings for one piston assembly. When installing, proper ring gap measurement and lubrication with 10W30 oil is recommended for optimal performance and longevity.