Namura .040 Over Bore Piston Kit for Honda Z50R, CRF50F & XR50R 40mm NX-10051-4

Namura .040 Over Bore Piston Kit for Honda

This Namura .040 Over Bore Piston Kit with 40mm bore replaces OEM part NX-10051-4 for Honda Z50R, CRF50F, and XR50R engines, providing a reliable top-end rebuild.

Overview

This Namura .040 Over Bore Piston Kit is a direct replacement for Honda Z50R, CRF50F, and XR50R minibikes. With a 40mm bore and OEM cross-reference NX-10051-4, this kit includes piston, rings, and pin for a complete rebuild. Namura Piston Kit ensures reliable compression and performance for your small Honda engine.

Built For Performance

• Includes piston, rings, and wrist pin for complete installation
• .040 oversize restores cylinder clearance on worn bores
• High-silicon aluminum alloy for durability and heat resistance
• Precision-machined to fit 40mm bore
• Direct replacement for OEM part NX-10051-4
• Ideal for rebuilding Z50R, CRF50F, XR50R

Fits These Machines

• for Honda Z50R
• for Honda CRF50F
• for Honda XR50R

On-The-Job Use

• Rebuilding minibike engines for enhanced performance
• Restoring vintage Honda Z50R, CRF50F, XR50R
• Increasing displacement for more power
• Replacing worn pistons after high mileage
• Off-road and pit bike engine maintenance

Specs At A Glance

Good To Know

Q: Will this kit work with other Honda 50cc engines? A: It is designed specifically for Z50R, CRF50F, and XR50R models with 40mm bore.

Q: Does it include everything needed for installation? A: The kit includes piston, rings, and wrist pin; you will need a new gasket set separately.

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