Namura Standard Bore Piston Kit Size A 66.34mm for Honda CR250R 2002-2004 66.4mm

Namura Standard Bore Piston Kit Size A 66.34mm for Honda

This piston kit is a direct replacement for Honda CR250R two-stroke engines from 2002 to 2004, restoring compression and performance.

Overview

The Namura standard bore piston kit size A 66.34mm is engineered for Honda CR250R motorcycles, providing a reliable replacement that maintains factory compression ratios. Precision-machined from cast aluminum alloy, this piston kit ensures a proper fit in the cylinder bore. Ideal for engine rebuilds or top-end refreshes, it helps restore lost power and reliability.

Built For Performance

• Size A 66.34mm diameter for standard bore applications
• Includes piston, rings, wrist pin, and circlips
• High-quality cast aluminum alloy for strength and heat dissipation
• Precision pin bore and ring grooves for consistent compression
• Designed to match OEM specifications for Honda CR250R 2002-2004

Fits These Machines

• for Honda CR250R (2002-2004)

On-The-Job Use

• Motocross and off-road racing
• Trail riding and recreational dirt biking
• Engine rebuilds and top-end replacements

Specs At A Glance

Good To Know

Q: Do I need to re-plate or hone the cylinder for this piston? A: For a standard bore piston kit, the cylinder must be within specification; measure wear and condition before installation, and consider a light hone if needed.

Q: What is the difference between Size A and other sizes? A: Size A denotes the standard bore size; larger sizes (B, C, etc.) are oversize pistons for rebored cylinders. This kit is for stock bore.

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