Namura Standard Bore Cylinder for Yamaha 2005-2021 YZ125 & 2020-2022 YZ125X 54mm

Standard Bore Cylinder for Yamaha

This standard bore cylinder is a direct replacement for Yamaha YZ125 two-stroke engines, offering 54mm bore diameter for models from 2005 to 2021 and YZ125X from 2020 to 2022.

Overview

The standard bore cylinder is designed to restore compression and performance in Yamaha YZ125 and YZ125X motorcycles. It offers reliable operation and consistent power delivery for both motocross and trail riding. This cylinder is a cost-effective solution for rebuilding your Yamaha 125cc engine.

Built For Performance

• 54mm bore size matches OEM specifications for YZ125 engines
• Nikasil-coated cylinder wall for reduced friction and durability
• Precise port timing for optimal power characteristics
• Direct fit without modifications to the crankcase
• Includes cylinder studs and O-rings for complete installation

Fits These Machines

• for Yamaha YZ125 (2005-2021)
• for Yamaha YZ125X (2020-2022)

On-The-Job Use

• Motocross racing on prepared tracks
• Enduro and cross-country trail riding
• Recreational off-road riding
• Engine rebuilding for high-hour bikes

Specs At A Glance

Good To Know

Q: Will this cylinder fit my 2018 YZ125? A: Yes, it fits YZ125 models from 2005 to 2021; confirm your serial number for compatibility.

Q: Do I need to replace the piston as well? A: It is recommended to install a new 54mm piston and rings for proper break-in and performance.

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