Namura Standard Bore Top End Rebuild Kit Size A for Yamaha YZ250F 2014-2018 77mm

Standard Bore Top End Rebuild Kit Size A for Yamaha

This is a high-quality top end rebuild kit designed for the Yamaha YZ250F models from 2014 to 2018, featuring a standard bore size of 77mm and including all necessary components to restore compression and performance.

Overview

This top end rebuild kit from Namura provides a complete solution for refreshing the cylinder and piston assembly on your Yamaha YZ250F. It includes a piston, rings, wrist pin, and circlips, all sized to the standard 77mm bore, making it ideal for riders looking to maintain peak engine output.

Built For Performance

• Precision-machined piston from high-silicone aluminum alloy for durability and heat dissipation
• Phosphate-coated wrist pin reduces friction and wear
• Dedicated ring set with correct end gap for optimal compression
• Includes circlips and gaskets for a complete install

Fits These Machines

• for Yamaha YZ250F (2014-2018)

On-The-Job Use

• Motocross racing and track days
• Trail riding and off-road competitions
• Engine rebuilding after high-hour use

Specs At A Glance

Good To Know

Q: Does this kit include a cylinder? A: No, this is a top end rebuild kit that includes the piston, rings, wrist pin, and gaskets; the cylinder must be reused or replaced separately.

Q: Is this kit compatible with 2013 YZ250F? A: No, this kit is specifically designed for the 2014-2018 Yamaha YZ250F with a standard 77mm bore.

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