Namura .020 Over Bore Piston, Gasket Kit for Yamaha Raptor 660 2001-2005 100.5mm

.020 Over Bore Piston and Gasket Kit for Yamaha Raptor 660 (2001-2005) 100.5mm

This .020 over bore piston and gasket kit from Namura is an aftermarket replacement for Yamaha Raptor 660 models from 2001 to 2005, providing a complete top-end rebuild solution.

Overview

This kit includes a .020 over bore piston and all necessary gaskets for the Yamaha Raptor 660 engine from 2001-2005. With a bore size of 100.5mm, it offers increased displacement and compression for improved power output. The Namura piston and gasket set is a reliable, cost-effective alternative to OEM parts, ideal for ATV riders performing engine overhauls or performance upgrades.

Built For Performance

• Piston constructed from durable aluminum alloy for reduced reciprocating mass
• .020 over bore design increases displacement and compression ratio
• Includes head gasket, base gasket, and other critical sealing components
• Precision-machined for accurate fit within Yamaha Raptor 660 cylinders
• Rings designed to provide optimal oil control and compression sealing

Fits These Machines

• for Yamaha Raptor 660 (2001-2005)

On-The-Job Use

• Sport ATV riding and recreational racing
• Dune riding and high-performance off-road use
• Engine rebuilding and performance restoration
• Trail riding with enhanced acceleration

Specs At A Glance

Good To Know

Q: Does this kit include the wrist pin and circlips? A: The kit includes the piston, rings, and gaskets; wrist pin and circlips may not be included, so check the package contents before installation.

Q: Can I install this piston in a standard bore cylinder? A: No, the cylinder must be bored to .020 over size (100.5mm) to match this piston; standard bore requires machining.

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