Namura Standard Bore Size C Piston Kit for Yamaha YZ250 & WR250 1992-1998 - 68mm

Namura Standard Bore Size C Piston Kit for Yamaha YZ250 & WR250

This Namura standard bore size C piston kit replaces the OEM piston in Yamaha YZ250 and WR250 two-stroke engines from 1992 to 1998, offering a reliable replacement for motocross and trail riding.

Overview

This Namura standard bore size C piston kit is a direct-fit replacement for Yamaha YZ250 and WR250 models from 1992 through 1998. It provides a precise 68mm bore diameter and includes the piston, rings, and wrist pin for a complete top-end rebuild. Riders looking to restore compression and power will find this piston kit a cost-effective solution for their two-stroke dirt bike.

Built For Performance

• Manufactured from high-strength aluminum alloy for durability
• Precision-machined to standard bore size C specifications
• Includes premium piston rings for optimal sealing
• Wrist pin and circlips included for complete installation
• Designed to meet OEM tolerances for reliable performance

Fits These Machines

• for Yamaha YZ250 (1992-1998)
• for Yamaha WR250 (1992-1998)

On-The-Job Use

• Motocross racing and off-road competition
• Trail riding and enduro events
• Rebuilding worn two-stroke engines for restored power
• General maintenance and top-end refresh for dirt bikes

Specs At A Glance

Good To Know

Q: Does this piston kit include a needle bearing for the wrist pin? A: The kit includes the piston, rings, wrist pin, and circlips; the needle bearing for the connecting rod is typically sold separately.

Q: Should I measure the cylinder bore before installation? A: Yes, always measure the cylinder bore to ensure it is within factory specification for a 68mm piston; excessive wear may require boring or re-sleeving.

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