Namura .060 Over Bore Piston Kit for Yamaha 660 Raptor, Grizzly & Rhino 101.5mm

Namura .060 Over Bore Piston Kit for Yamaha

This Namura .060 over bore piston kit replaces the original piston in your Yamaha 660 Raptor, Grizzly, or Rhino, providing a 101.5mm bore size for increased displacement.

Overview

The Namura .060 Over Bore Piston Kit is designed for Yamaha 660cc engines, offering a direct fit for Raptor, Grizzly, and Rhino models. It includes a cast piston and rings to restore or enhance engine performance. This kit is a popular choice for rebuilding high-mileage engines or adding a mild overbore.

Built For Performance

• Cast aluminum piston with precise .060 over bore sizing
• Includes piston rings and wrist pin for complete installation
• 101.5mm bore diameter matches factory overbore specifications
• Durable construction withstands high-temperature operation
• Lightweight design reduces reciprocating mass for quicker revs

Fits These Machines

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

On-The-Job Use

• Rebuilding ATV and UTV engines after wear or failure
• Upgrading engine displacement for more power in off-road applications
• Replacing worn pistons in high-hour recreational vehicles
• Performance restoration for Yamaha 660 series machines

Specs At A Glance

Good To Know

Q: Do I need to re-plate the cylinder after installing this overbore piston? A: Yes, a .060 over bore requires the cylinder to be bored and honed to match the new piston. Professional machining is recommended.

Q: Is this piston compatible with stock cylinder heads? A: Yes, the Namura piston is designed to work with the stock cylinder head and valve clearances for the Yamaha 660 engine.

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