Namura .040 Over Bore Piston Kit for Yamaha Breeze 125 & Grizzly 125 50mm

.040 Over Bore Piston Kit for Yamaha Breeze 125 & Grizzly 125

This .040 over bore piston kit is designed to restore compression and performance in Yamaha Breeze 125 and Grizzly 125 engines, providing a reliable replacement for worn components.

Overview

This .040 over bore piston kit is a direct fit upgrade for Yamaha Breeze 125 and Grizzly 125 ATVs, delivering increased displacement and restored power. The kit includes the piston, rings, and pin, making it a complete solution for engine rebuilding. Carefully machined to .040 over stock size, this piston kit ensures proper cylinder wall clearance and long-lasting performance.

Built For Performance

• Precision cast aluminum alloy construction for durability
• Includes piston rings and wrist pin for a complete top end rebuild
• Designed for .040 over bore to compensate for cylinder wear
• Lightweight design reduces reciprocating mass for quicker throttle response
• Direct replacement for OEM piston without modification

Fits These Machines

• for Yamaha Breeze 125
• for Yamaha Grizzly 125

On-The-Job Use

• Restoring lost compression in high-mileage engines
• Rebuilding top end for improved power and reliability
• Upgrading from standard bore to overbore for increased displacement
• Maintaining performance in utility and recreational ATVs

Specs At A Glance

Good To Know

Q: Does this kit include everything needed for installation? A: Yes, the kit includes the piston, rings, and wrist pin; however, you may need to reuse or replace circlips depending on your build.

Q: Can I use this .040 over piston in a standard bore cylinder? A: No, the cylinder must be bored to .040 over size to accommodate this piston; a standard cylinder will require machining.

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