Namura Standard Bore Top End Kit for Honda Sportrax 250 TRX250EX TRX250X 68.5mm

Namura Standard Bore Top End Kit for Honda

This Namura Standard Bore Top End Kit rebuilds the top end of a Honda Sportrax 250 TRX250EX or TRX250X with a 68.5mm bore, providing a direct replacement for worn pistons, rings, and gaskets to restore compression and performance.

Overview

This Namura Standard Bore Top End Kit for Honda delivers the essential components needed to refresh the cylinder assembly on a Honda TRX250EX or TRX250X, replacing factory parts with a 68.5mm bore size to bring back lost power and reliability. The kit includes a piston, rings, wrist pin, and gaskets, making it a complete solution for top-end restoration on these specific Honda sport ATV models.

Built For Performance

• Includes a 68.5mm standard bore piston specifically for Honda TRX250EX and TRX250X engines
• High-quality ring set designed for proper sealing and reduced blow-by
• Precision-machined wrist pin ensures smooth connection between piston and connecting rod
• Complete gasket set allows a hassle-free reassembly of the top end
• Manufactured to exacting tolerances for reliable long-term use

Fits These Machines

• for Honda TRX250EX
• for Honda TRX250X

On-The-Job Use

• Rebuilding a worn top end on a Honda Sportrax 250 trail ATV
• Restoring compression after high-mileage or seasonal use
• Replacing a damaged or seized piston and cylinder assembly
• Performing a routine top-end refresh during engine overhaul

Specs At A Glance

Good To Know

Q: Does this kit include everything needed to rebuild the top end? A: Yes, it includes a 68.5mm piston, ring set, wrist pin, and complete gasket kit for a full top-end refresh on the specified Honda models.

Q: Can I use this kit on a standard-bore cylinder without machining? A: This kit is designed for a standard 68.5mm bore, so your cylinder must be in good condition and within spec; always measure before installation.

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