Namura Standard Bore Piston Kit Size A 76.96mm for Yamaha YZ250FX 2015-2019 77mm

Namura Standard Bore Piston Kit Size A 76.96mm for Yamaha YZ250FX 2015-2019

This standard bore piston kit is a high-quality replacement for Yamaha YZ250FX models, featuring a 76.96mm bore size and Size A piston for optimal engine performance.

Overview

The Namura standard bore piston kit is a direct-fit replacement for Yamaha YZ250FX motorcycles from 2015 to 2019. It provides a precise 76.96mm bore diameter and Size A piston to restore compression and power. This standard bore piston kit is ideal for engine rebuilds and top-end overhauls.

Built For Performance

• Precision-machined from high-strength aluminum alloy
• Includes piston, rings, wrist pin, and circlips
• Size A piston for accurate clearance
• 76.96mm standard bore diameter for OEM-spec fit
• Designed for reliable long-term use in off-road conditions

Fits These Machines

• for Yamaha YZ250FX 2015
• for Yamaha YZ250FX 2016
• for Yamaha YZ250FX 2017
• for Yamaha YZ250FX 2018
• for Yamaha YZ250FX 2019

On-The-Job Use

• Engine top-end rebuild for off-road enduro racing
• Restores lost compression and power in high-hour engines
• Suitable for trail riding and competitive enduro events
• Common replacement during routine engine maintenance

Specs At A Glance

Good To Know

Q: Is this piston kit compatible with my Yamaha YZ250FX? A: This standard bore piston kit is designed for YZ250FX models from 2015 to 2019 with a 76.96mm bore. Always verify your engine's serial number before ordering.

Q: What is the difference between Size A, B, C pistons? A: The letter indicates the piston grade for fine-tuning clearance. Size A is a specific tolerance for proper fit in standard bore cylinders.

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