653M04200 Wiseco .080 Piston Kit for Yamaha PW50 1981-2024 42.00 mm

Wiseco .080 Piston Kit for Yamaha PW50

This Wiseco .080 piston kit for Yamaha PW50 restores compression and top-end power on 1981-2024 PW50 models, with the kit cross-referencing 653M04200 at a 42.00 mm bore size.

Overview

This Wiseco .080 piston kit for Yamaha PW50 is a top-end rebuild component that replaces a worn or scored piston to bring compression and performance back to spec. Built as a 42.00 mm oversize kit under part 653M04200, it suits riders and mechanics refreshing a high-hour PW50 engine. The piston kit for Yamaha PW50 covers the 1981-2024 model run.

Built For Performance

• Forged piston construction for strength under heat and load
• .080 oversize at 42.00 mm bore to clean up a worn cylinder
• Kit includes piston, rings, wrist pin, and circlips
• Cross-references 653M04200 for easy part matching
• Designed for the PW50 single-cylinder two-stroke top end

Fits These Machines

• for Yamaha PW50 1981
• for Yamaha PW50 1982-1990
• for Yamaha PW50 1991-2000
• for Yamaha PW50 2001-2010
• for Yamaha PW50 2011-2024

On-The-Job Use

• Top-end rebuilds on high-hour PW50 youth bikes
• Restoring compression lost to piston and ring wear
• Reconditioning a cylinder bored to the .080 oversize
• Shop and home garage engine refresh projects

Specs At A Glance

Good To Know

Q: What does the .080 oversize mean for my cylinder? A: The .080 oversize piston requires the cylinder to be bored and honed to match the larger 42.00 mm diameter. Verify your cylinder has enough material left before ordering.

Q: Does the kit include everything for a top-end rebuild? A: It ships with the piston, rings, wrist pin, and circlips needed for reassembly. Gaskets and bearings are separate items.

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