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

Standard Bore Size A Piston Kit for Yamaha

This Standard Bore Size A piston kit is a direct replacement for Yamaha YZ250 and WR250 models from 1992 to 1998, featuring a 68mm bore size.

Overview

This Standard Bore Size A piston kit from Namura is engineered to restore compression and power in Yamaha YZ250 and WR250 engines. It provides a precise fit for 1992-1998 models, using a 68mm bore. The piston kit includes all necessary components for a complete top-end rebuild.

Built For Performance

• Precision-machined from high-strength aluminum alloy for durability
• Plasma-moly coated rings reduce friction and improve seal
• Lightweight design reduces reciprocating mass for quicker throttle response
• Heat-treated to withstand high operating temperatures
• Includes wrist pin and circlips for complete installation

Fits These Machines

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

On-The-Job Use

• Top-end rebuild for motocross and trail riding
• Restoring lost engine compression and power
• Replacing worn pistons during routine engine maintenance
• Custom engine builds requiring standard bore size

Specs At A Glance

Good To Know

Q: Is this piston kit compatible with aftermarket cylinders? A: It is designed for OEM standard bore cylinders; aftermarket cylinders may require different sizing.

Q: Does the kit include the wrist pin bearing? A: The kit includes a wrist pin and circlips, but no bearing; please check your engine configuration.

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