Namura Standard Bore Size B Top End Kit for Honda many CRF250R & CRF250X 78mm

Namura Standard Bore Size B Top End Kit for Honda

This Namura Standard Bore Size B top end kit includes a piston, rings, wrist pin, and circlips designed to rebuild the top end of Honda CRF250R and CRF250X engines with a 78mm bore.

Overview

The Namura Standard Bore Size B top end kit is a direct replacement piston assembly for Honda CRF250R and CRF250X motorcycles. It provides the essential components needed to restore compression and performance after top end wear. This kit is intended for riders and mechanics rebuilding their high-performance dirt bike engine.

Built For Performance

• Features a forged aluminum piston for strength and heat dissipation
• Includes high-quality chrome-plated piston rings for reduced friction
• Precision-machined wrist pin and circlips ensure secure installation
• Designed to match OEM specifications for reliable fit and function
• 78mm standard bore size maintains factory bore dimensions

Fits These Machines

• for Honda CRF250R
• for Honda CRF250X

On-The-Job Use

• Motocross racing and track days
• Trail riding and off-road adventures
• Enduro and cross-country competition
• Engine rebuilds and performance restoration

Specs At A Glance

Good To Know

Q: Does this kit fit both CRF250R and CRF250X? A: Yes, this Namura top end kit is designed to fit both Honda CRF250R and CRF250X models with the 78mm bore, but always verify compatibility with your specific year and serial number.

Q: What is included in the kit? A: The kit includes a piston, piston rings, wrist pin, and circlips; you may need to reuse or replace additional gaskets and seals separately.

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