236M05650 Wiseco .020 Piston Kit for Yamaha Tri-Moto 125 1980-1985 56.50 mm

.020 Piston Kit for Yamaha Tri-Moto 125

This .020 oversize piston kit for Yamaha Tri-Moto 125 models is a Wiseco 236M05650 piston set at 56.50 mm, engineered to restore compression and top-end power after a cylinder bore.

Overview

This Wiseco .020 piston kit for Yamaha Tri-Moto 125 machines is built for riders refreshing a worn or scored top end. The 56.50 mm oversize piston for Yamaha Tri-Moto 125 engines pairs with a fresh bore to bring compression and throttle response back to spec. It suits DIY rebuilders and shops handling 1980-1985 three-wheeler top-end work.

Built For Performance

• Wiseco 236M05650 piston sized at 56.50 mm, a .020 inch oversize from the stock 56.00 mm bore
• Forged construction for strength under the heat and load of a two-stroke top end
• Precision ring grooves and skirt profile matched to the piston for consistent sealing
• Designed for use after the cylinder is bored and honed to the matching oversize
• Piston kit format supplies the piston and rings needed for a top-end refresh

Fits These Machines

• for Yamaha Tri-Moto 125, 1980-1985

On-The-Job Use

• Top-end rebuilds on 1980-1985 Yamaha Tri-Moto 125 three-wheelers
• Cylinder boring jobs that require a .020 oversize piston to clean up wear
• Restoring lost compression on tired engines before a riding season
• Shop work on vintage Yamaha 125 top ends where an exact oversize bore is needed

Specs At A Glance

Good To Know

Q: Does this piston drop into a stock cylinder? A: No, a .020 oversize piston requires the cylinder to be bored and honed to the matching 56.50 mm bore first. Confirm the final bore size with your machinist before ordering.

Q: Will I need anything else for the rebuild? A: A top-end rebuild typically also calls for a gasket set, wrist pin, and bearing in addition to this piston kit. Check your engine's condition before finalizing parts.

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