520M04800 Wiseco Standard Piston Kit 48.00mm for Yamaha YZ80 1985-1987

Wiseco Std Piston Kit for Yamaha

This Wiseco Std Piston Kit for Yamaha YZ80 restores top-end compression in 1985-1987 machines, with a 48.00 mm bore size and OEM cross-reference 520M04800.

Overview

This Wiseco Std Piston Kit for Yamaha is a standard-bore replacement piston assembly for the YZ80 two-stroke. The kit brings the cylinder back to factory 48.00 mm spec so compression and throttle response return to normal. It suits riders rebuilding a tired top end on a 1985-1987 YZ80.

Built For Performance

• Standard 48.00 mm bore size matches the original cylinder dimension
• Wiseco forged piston construction for strength under two-stroke heat and load
• Includes piston, rings, wrist pin, and circlips for a complete top-end job
• OEM cross-reference 520M04800 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 on a worn or seized YZ80 engine
• Routine piston replacement during a scheduled refresh
• 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 bore measures 48.00 mm before ordering.

Q: Can I install this without machining? A: A standard-bore piston fits a cylinder that is still at spec, but a worn or scored bore may need honing or replating. Measure the cylinder and check piston-to-wall clearance first.

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