Namura Standard Bore Top End Kit Size C for KTM 125 SX & 125 EXC 2002-2006 54mm

Standard Bore Top End Kit for Namura - Size C 54mm

This standard bore top end kit for Namura replaces the piston, rings, pin, and gaskets to restore compression and performance in compatible KTM 125cc engines. It is designed for riders rebuilding a KTM 125 SX or 125 EXC from 2002 through 2006.

Overview

The standard bore top end kit for Namura delivers a complete cylinder rebuild solution with a precision-machined piston and premium rings. This standard bore top end kit is ideal for restoring top-end power in 2002-2006 KTM 125 SX and 125 EXC motorcycles. Rely on this standard bore top end kit for a direct-fit replacement that brings back factory-like performance.

Built For Performance

• Precision-machined 54mm piston for accurate fit
• High-strength ring set for consistent compression
• Heat-treated wrist pin for reduced wear
• Complete gasket set for a leak-free seal
• Engineered for high-rpm two-stroke engines

Fits These Machines

• for KTM 125 SX (2002-2006)
• for KTM 125 EXC (2002-2006)

On-The-Job Use

• Motocross racing
• Enduro and trail riding
• Off-road competition
• Recreational dirt biking

Specs At A Glance

Good To Know

Q: Does this kit include a wrist pin bearing? A: The kit includes the piston, rings, wrist pin, and circlips but not the wrist pin bearing. Purchase the bearing separately if needed.

Q: Can this kit be used with a stock cylinder? A: Yes, the standard bore size C is designed for use with a stock cylinder that has not been overbored. Always measure your cylinder before ordering.

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