520M05000 Wiseco .080 Oversize Piston Kit 50.00mm for Yamaha YZ80 1985-1987

Wiseco .080 Piston Kit for Yamaha

This Wiseco .080 Piston Kit for Yamaha YZ80 brings a 50.00 mm oversize bore to 1985-1987 engines, with OEM cross-reference 520M05000 for top-end rebuilds.

Overview

This Wiseco .080 Piston Kit for Yamaha is an oversize replacement piston assembly for the YZ80 two-stroke. The 50.00 mm bore size suits a cylinder that has been bored out to clean up wear or damage. It fits riders rebuilding a 1985-1987 YZ80 top end that is past standard spec.

Built For Performance

• Oversize 50.00 mm bore size for cylinders bored beyond standard
• Wiseco forged piston construction built for two-stroke heat and load
• Includes piston, rings, wrist pin, and circlips for a complete top-end job
• OEM cross-reference 520M05000 confirms the intended application
• Designed for the 1985-1987 Yamaha YZ80 engine platform

Fits These Machines

• for Yamaha YZ80 1985
• for Yamaha YZ80 1986
• for Yamaha YZ80 1987

On-The-Job Use

• Top-end rebuilds where the cylinder has been bored oversize
• Repairing a scored or worn YZ80 bore
• Restoring compression on a trail or track bike
• Dirt bike maintenance in a home or shop setting

Specs At A Glance

Good To Know

Q: Does this kit include rings and pin? A: Yes, a Wiseco piston kit of this type ships with the piston, rings, wrist pin, and circlips. Confirm your cylinder has been bored to the matching 50.00 mm oversize.

Q: Can I install this in a stock cylinder? A: No, an oversize piston requires the cylinder to be bored and honed to match. Check piston-to-wall clearance with the new piston before assembly.

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