Namura Standard Bore Top End Rebuild Kit Size C for Yamaha YZ250F 2019-2024 77mm

Standard Bore Top End Rebuild Kit Size C for Yamaha

This is a 77mm standard bore top end rebuild kit size C for Yamaha YZ250F models from 2019 to 2024, designed to restore engine compression and performance after top end wear.

Overview

The Namura Standard Bore Top End Rebuild Kit Size C includes a piston, rings, wrist pin, circlips, and gasket set, providing a complete solution for rebuilding the cylinder head on compatible Yamaha YZ250F engines. This kit is engineered for riders who need reliable replacement parts for recreational or competitive motocross use.

Built For Performance

• Includes a 77mm cast piston with precise ring grooves for optimal sealing
• Kit contains all necessary gaskets for a proper seal between cylinder and head
• Wrist pin and circlips are included for secure piston-to-rod attachment
• Size C refers to the piston diameter class for accurate fit within standard bore cylinders
• Designed to meet OEM specifications for 2019-2024 Yamaha YZ250F

Fits These Machines

• for Yamaha YZ250F 2019-2024

On-The-Job Use

• Replaces worn top end components on motocross and off-road bikes
• Restores power and compression after high-hour use
• Suitable for DIY mechanics rebuilding the cylinder head at home

Specs At A Glance

Good To Know

Q: Does this kit include a wrist pin bearing? A: No, the kit includes a wrist pin but no bearing; you may need to reuse or purchase the bearing separately.

Q: Can this kit be used on earlier model years? A: This kit is specifically designed for 2019-2024 YZ250F engines; earlier models have different cylinder dimensions and are not compatible.

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