Namura Standard Bore Piston Kit Size A 76.96mm for Yamaha WR250F 2015-2019 77mm

Standard Bore Piston Kit Size A 76.96mm for Yamaha WR250F 2015-2019 77mm

This Namura Standard Bore Piston Kit size A at 76.96mm is a direct replacement piston assembly designed for Yamaha WR250F models from 2015 through 2019, restoring compression and performance in a 77mm bore engine.

Overview

The Namura Standard Bore Piston Kit size A 76.96mm is an aftermarket replacement piston designed for 2015-2019 Yamaha WR250F engines with a 77mm bore. This kit includes the piston, rings, wrist pin, and circlips, enabling a complete top-end rebuild. It restores lost compression and power while maintaining factory specifications for reliable operation.

Built For Performance

• Forged aluminum alloy construction for high strength and reduced weight
• Precision-machined ring grooves ensure consistent ring seal
• Includes a matched wrist pin and circlips for secure installation
• Designed to meet OEM clearances for direct fitment
• Coated skirt reduces friction and wear during break-in

Fits These Machines

• for Yamaha WR250F 2015
• for Yamaha WR250F 2016
• for Yamaha WR250F 2017
• for Yamaha WR250F 2018
• for Yamaha WR250F 2019

On-The-Job Use

• Top-end engine rebuilds on Yamaha WR250F off-road motorcycles
• Restoring compression in high-hour dirt bike engines
• Replacing worn pistons during routine maintenance intervals

Specs At A Glance

Good To Know

Q: Is this piston kit a direct OEM replacement? A: Yes, the Namura Standard Bore Piston Kit is designed as a direct fit replacement for the stock piston in 2015-2019 Yamaha WR250F engines, using the same bore size and pin dimensions.

Q: What is included in the kit? A: The kit includes one piston, piston rings, a wrist pin, and circlips; all components are required for a complete piston replacement.

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