Namura Standard Bore Piston Rings for Yamaha 660 Raptor, Grizzly & Rhino 100mm

Namura Standard Bore Piston Rings for Yamaha

These standard bore piston rings measure 100mm and are designed for Yamaha 660 Raptor, Grizzly, and Rhino engines.

Overview

The Namura standard bore piston rings are manufactured for Yamaha 660 Raptor, Grizzly, and Rhino models with a 100mm bore size. They provide a precise seal between piston and cylinder to maintain compression and reduce oil consumption. These rings are ideal for engine rebuilds or top-end refreshes on these popular Yamaha ATV and side-by-side vehicles.

Built For Performance

• Standard bore size of 100mm for OEM replacement
• Made from high-strength ductile iron for durability
• Precision-ground faces for optimal cylinder sealing
• Includes top and second ring for complete set
• Tested for consistent tension and heat resistance

Fits These Machines

• for Yamaha Raptor 660
• for Yamaha Grizzly 660
• for Yamaha Rhino 660

On-The-Job Use

• Rebuilding Yamaha 660 engines after wear or failure
• Restoring compression in high-mileage ATVs and UTVs
• Trail riding, farm work, and recreational use

Specs At A Glance

Good To Know

Q: Are these rings compatible with a stock Yamaha 660 piston? A: Yes, they are designed for standard bore OEM or aftermarket pistons with a 100mm diameter.

Q: Do I need to gap these rings before installation? A: It is always recommended to check ring end gap according to your engine specifications and file-fit if needed for proper clearance.

Slight variation in finish or dimensions may occur between production runs, and fit can depend on serial number, so confirm compatibility before ordering.