Namura .020 Over Bore Piston Kit for Yamaha Grizzly 600 fits 1998-2001 95.5mm

Namura .020 Over Bore Piston Kit for Yamaha Grizzly 600

This Namura .020 over bore piston kit is designed for Yamaha Grizzly 600 ATVs manufactured between 1998 and 2001, providing a direct replacement piston with a 95.5mm bore size to restore engine compression and performance.

Overview

Namura .020 over bore piston kit for Yamaha Grizzly 600 is an aftermarket piston assembly that increases the engine displacement slightly while maintaining reliability. This kit includes the piston, rings, wrist pin, and circlips for a complete top-end overhaul. It is intended for ATV owners rebuilding the engine of their Grizzly 600.

Built For Performance

• Cast aluminum alloy piston with reinforced skirt for durability
• Precision-machined to .020 over factory bore size (95.5mm)
• Includes high-quality piston rings for proper sealing
• Wrist pin and circlips included for complete installation
• Engineered to match OEM specifications for Yamaha Grizzly 600

Fits These Machines

• for Yamaha Grizzly 600 (1998-2001)

On-The-Job Use

• ATV trail riding and utility work
• Engine rebuild after worn piston or cylinder bore damage
• Performance restoration for aging Grizzly 600 engines
• Off-road and recreational riding

Specs At A Glance

Good To Know

Q: Does this piston kit require cylinder boring? A: Yes, because it is .020 over size, the cylinder must be bored to 95.5mm to ensure proper clearance.

Q: What break-in procedure is recommended? A: Follow a standard piston ring break-in with varying loads and avoid prolonged idle for the first hour of operation.

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