Namura .060 Over Bore Piston Kit for Yamaha YZ250 & YZ250X fits 1999-2024 67.9mm

.060 Over Bore Piston Kit for Yamaha

This .060 over bore piston kit for Yamaha provides a high-performance replacement piston with rings and pin for YZ250 and YZ250X models from 1999 to 2024, sized at 67.9mm.

Overview

This .060 over bore piston kit for Yamaha is designed to restore compression and power in aged or worn cylinders. It is an ideal choice for rebuilding Yamaha YZ250 and YZ250X engines from 1999 through 2024. Namura's piston kit delivers a precise fit and reliable performance for off-road and motocross use.

Built For Performance

• Bore size .060 over (1.5mm oversize) for worn cylinders
• Precision-machined 67.9mm piston diameter
• Includes high-quality piston rings and wrist pin
• Designed for high-compression applications
• Engineered for durability in Yamaha YZ engines

Fits These Machines

• for Yamaha YZ250 (1999-2024)
• for Yamaha YZ250X (1999-2024)

On-The-Job Use

• Rebuilding top end of Yamaha YZ250 and YZ250X
• Motocross racing demanding high-reliability
• Trail riding and off-road competition
• Performance engine upgrades after cylinder wear

Specs At A Glance

Good To Know

Q: Is this piston kit suitable for a 2005 YZ250? A: Yes, this piston kit fits Yamaha YZ250 models from 1999 to 2024. Confirm your cylinder bore condition before installation.

Q: What is the advantage of a .060 over bore piston? A: A .060 over bore piston allows you to clean up a worn or scored cylinder while increasing displacement slightly, restoring compression and power.

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