Namura Size A Standard Bore Top End Repair Kit for Yamaha YZ125 2005-2021 54mm

Namura Size A Standard Bore Top End Repair Kit for Yamaha

This top end repair kit is a complete cylinder and piston assembly for Yamaha YZ125 motorcycles, sized at 54mm standard bore, restoring compression and power.

Overview

The Namura size A standard bore top end repair kit is designed for Yamaha YZ125 engines from 2005 to 2021, providing a direct replacement for the original cylinder, piston, and rings. This top end repair kit ensures proper sealing and compression, restoring lost performance in your YZ125. Ideal for motocross and off-road use, this top end repair kit is a cost-effective solution for engine refresh.

Built For Performance

• 54mm standard bore piston with precision-machined rings
• Plated cylinder for durability and heat dissipation
• Includes piston pin, clips, and gasket set
• Matched to size A standard specifications for accurate fit
• Compatible with 2005-2021 Yamaha YZ125 engines
• OEM replacement quality without the dealer price

Fits These Machines

• for Yamaha YZ125 (2005-2021)

On-The-Job Use

• Motocross racing and practice sessions
• Trail riding and enduro competitions
• Engine top end rebuilds for high-hour motorcycles
• Restoration of performance after piston wear or seizure

Specs At A Glance

Good To Know

Q: Does this kit include the cylinder head? A: No, this top end repair kit includes the cylinder, piston, rings, pin, clips, and gaskets. The cylinder head is not included and must be reused or purchased separately.

Q: Can I use this kit on a 2003 YZ125? A: This kit is designed for 2005-2021 YZ125 models. Earlier models may have different bore sizes or porting; verify your engine model 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.