222M04800 .040 Piston Kit for Yamaha GT1 MX80 1973-1982 48.00 mm

Wiseco Piston Kit 48.00 mm for Yamaha GT1 and MX80

This Wiseco 222M04800 piston kit brings a 48.00 mm .040 overbore piston to Yamaha GT1 and MX80 engines, restoring compression and reliable combustion for top-end rebuilds.

Overview

This Wiseco piston kit for Yamaha GT1 and MX80 models delivers a 48.00 mm .040 overbore replacement piston for engine rebuilds. The piston kit for Yamaha GT1 and MX80 machines restores lost compression and keeps combustion consistent. Riders and mechanics use this piston kit for Yamaha GT1 and MX80 top-end work when the original cylinder has been bored out.

Built For Performance

• Wiseco 222M04800 forged piston designed for high-compression two-stroke use
• 48.00 mm .040 overbore size fits a bored-out cylinder
• Ring set, wrist pin, and circlips included for a complete top-end rebuild
• Lightweight forged construction reduces reciprocating mass
• Precision-machined skirt for smooth cylinder wall contact
• Designed to withstand repeated heat cycles

Fits These Machines

• for Yamaha GT1 1973-1982
• for Yamaha MX80 1973-1982

On-The-Job Use

• Top-end rebuilds on vintage Yamaha two-stroke singles
• Restoring compression on high-hour engines
• Replacing a scored or worn stock piston with an overbore
• Routine maintenance on trail and dirt machines

Specs At A Glance

Good To Know

Q: Does this piston kit include rings and a wrist pin? A: Yes, this Wiseco kit ships with the piston, ring set, wrist pin, and circlips for a complete top-end install. Confirm your cylinder has been bored to 48.00 mm before ordering.

Q: Will this piston kit fit my specific GT1 or MX80? A: It is built for Yamaha GT1 and MX80 models from 1973 through 1982, but fitment can vary by serial number and prior overbores. Measure your cylinder before purchase.

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