Namura .010 Over Bore Piston Kit for Honda Sportrax 250 TRX250EX TRX250X 68.75mm

Namura .010 Over Bore Piston Kit for Honda

This Namura .010 over bore piston kit is a direct replacement for Honda Sportrax 250, TRX250EX, and TRX250X ATV engines, featuring a 68.75mm bore size to restore compression and power after cylinder wear. It includes the piston, rings, wrist pin, and circlips for a complete top-end rebuild.

Overview

This Namura .010 over bore piston kit is designed for Honda Sportrax 250, TRX250EX, and TRX250X models, providing a 68.75mm bore to match over-bored cylinders. It is ideal for rebuilding ATV engines to factory-like performance, with all necessary components included for a straightforward installation. The Namura piston kit delivers durability and consistent power for recreational and competition use.

Built For Performance

• Precision-machined 68.75mm piston for a .010 over bore fit
• High-strength aluminum alloy construction for heat resistance
• Includes piston rings with optimal tension for reduced blow-by
• Wrist pin and circlips supplied for secure assembly
• Designed to meet OEM specifications for Honda engines

Fits These Machines

• for Honda Sportrax 250
• for Honda TRX250EX
• for Honda TRX250X

On-The-Job Use

• Trail riding and recreational ATV use where engine rebuild is needed
• After cylinder honing or boring to restore compression
• Racing and competitive off-road events
• Routine engine maintenance to extend service life

Specs At A Glance

Good To Know

Q: Do I need to hone the cylinder before installing this piston kit? A: Yes, the cylinder should be professionally honed to the correct clearance for a .010 over bore piston to ensure proper ring seating and oil control.

Q: Can this piston kit be used with a stock carburetor or EFI system? A: Yes, it is designed to work with the original fuel delivery system, but we recommend checking jetting or tuning after installation for optimal performance.

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