653M04100 Wiseco .040 Piston Kit for Yamaha PW50 1981-2024 41.00 mm

Wiseco .040 Piston Kit for Yamaha PW50

Wiseco .040 piston kit for Yamaha PW50 models, an oversize rebuild piston kit with a 41.00 mm bore that restores compression and top end power, referenced under part number 653M04100.

Overview

This Wiseco .040 piston kit for Yamaha PW50 fits 1981 through 2024 models and delivers a reliable top end refresh for worn engines. The 41.00 mm oversize piston kit includes the piston needed to bore and rebuild the cylinder for renewed performance. It suits riders and mechanics servicing PW50 minibikes who want a proven Wiseco piston kit for Yamaha PW50 applications.

Built For Performance

• .040 oversize bore at 41.00 mm for a clean, refinished cylinder
• Wiseco forged piston construction for strength under heat and load
• Direct reference part number 653M04100 for easy lookup
• Designed as a top end rebuild component for the Yamaha PW50
• Oversize design compensates for cylinder wear during rebuild

Fits These Machines

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

On-The-Job Use

• Top end rebuilds after compression loss
• Cylinder boring and honing service on PW50 engines
• Youth minibike maintenance and repair
• Restoring power on high hour PW50 machines

Specs At A Glance

Good To Know

Q: Does this piston kit require boring the cylinder? A: Yes, a .040 oversize piston needs the cylinder bored and honed to match the 41.00 mm size. Machine work should be done by a qualified shop before assembly.

Q: Will this fit every Yamaha PW50 year listed? A: It is listed for 1981 through 2024 PW50 models, but fit can depend on the current cylinder condition and prior overbores. Confirm your bore size before ordering.

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