Namura .020 Over Bore Top End Kit for Honda Sportrax 250 TRX250EX TRX250X 69mm

Top End Kit for Honda Sportrax 250

This .020 over bore top end kit for Honda Sportrax 250 provides a complete piston, rings, wrist pin, and gasket set to rebuild the cylinder on TRX250EX and TRX250X models. The 69mm piston delivers increased displacement and restored compression for this top end kit.

Overview

This .020 over bore top end kit is designed for Honda Sportrax 250 ATVs and includes a 69mm piston, rings, wrist pin, circlips, and a full gasket set. It replaces worn top end components to restore engine performance in compatible TRX250EX and TRX250X models. The kit uses precision-machined parts to ensure a proper fit and reliable operation.

Built For Performance

• .020 inch oversize bore increases displacement for more power
• 69mm piston is cast from high-strength aluminum alloy
• Includes moly-coated piston rings for reduced friction
• Complete gasket set ensures a leak-free seal
• Wrist pin and circlips supplied for easy installation
• Precision-machined to OEM specifications for reliable fit

Fits These Machines

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

On-The-Job Use

• Restores lost compression and power on high-mileage engines
• Ideal for trail riding, racing, and recreational ATV use
• Replaces worn piston, rings, and gaskets in one complete kit
• Ensures reliable startup and smooth throttle response
• Supports .020 over bore cylinder machining for a fresh rebuild

Specs At A Glance

Good To Know

Q: What is included in this top end kit? A: The kit contains a 69mm piston, piston rings, wrist pin, circlips, and a complete gasket set for a full top end rebuild.

Q: Can I use this kit with a standard cylinder? A: No, this .020 over bore kit requires the cylinder to be bored to the corresponding oversize by a qualified machinist.

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