Namura .020 Over Bore Piston Kit for Yamaha 2002-2018 YZ85 48mm

.020 Over Bore Piston Kit for Yamaha

This .020 over bore piston kit is designed to replace the standard piston in a Yamaha YZ85 engine, increasing bore to 48mm for enhanced power output.

Overview

This Namura .020 over bore piston kit is built for Yamaha YZ85 models from 2002 to 2018, delivering a 48mm bore for added displacement. The kit includes a piston, rings, and pin, making it a complete solution for a top-end rebuild. Riders seeking more power from their two-stroke YZ85 will find this piston kit a reliable aftermarket option.

Built For Performance

• Precision-machined from high-silicone alloy for durability
• Moly-coated skirts reduce friction and scuffing
• Ring set includes one steel and one chrome ring for sealing
• Wrist pin retained by heavy-duty circlips
• Designed for .020 over bore to 48mm

Fits These Machines

• for Yamaha YZ85 (2002-2018)

On-The-Job Use

• Motocross racing
• Trail riding
• Off-road competition
• Top-end rebuilds
• Engine performance enhancement

Specs At A Glance

Good To Know

Q: Is this piston kit compatible with a standard bore cylinder? A: No, this is a .020 over bore kit designed for a cylinder that has been bored to 48mm. It requires matching cylinder bore work.

Q: What is included in the kit? A: The kit includes a piston, piston rings, wrist pin, and circlips for a complete installation.

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