Namura .040 Over Bore Piston Bearing & Gasket Kit for Yamaha PW80 & BW80 48mm

Namura .040 Over Bore Piston Bearing & Gasket Kit for Yamaha

This Namura .040 over bore piston bearing and gasket kit rebuilds the top end of Yamaha PW80 and BW80 engines with a 48mm bore size.

Overview

This Namura .040 over bore piston bearing and gasket kit is designed to restore compression and performance in Yamaha PW80 and BW80 two-stroke engines. It includes a piston, rings, bearing, and gaskets for a complete top end rebuild. The .040 over bore increases the cylinder displacement slightly for added power.

Built For Performance

• Precision-machined piston from cast aluminum alloy for durability
• Includes needle bearing and wrist pin for smooth operation
• Complete gasket set ensures leak-free sealing
• .040 over bore size compensates for cylinder wear
• Designed for 48mm bore Yamaha engines

Fits These Machines

• for Yamaha PW80
• for Yamaha BW80

On-The-Job Use

• Rebuilding top end of dirt bikes and dual-sport motorcycles
• Restoring lost compression in aged two-stroke engines
• Off-road trail riding and recreational use
• General engine maintenance and performance refresh

Specs At A Glance

Good To Know

Q: Does this kit include a wrist pin? A: Yes, the kit includes a wrist pin and needle bearing for the connecting rod.

Q: Will this fit a stock cylinder without boring? A: No, the .040 over bore piston requires the cylinder to be bored to match the oversize.

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