457M04900 Wiseco Std Piston Kit 49.00 mm for Yamaha YZ80 1976-1980

Wiseco Std Piston Kit for Yamaha YZ80

This Wiseco standard piston kit, reference 457M04900, is a 49.00 mm forged piston assembly built to restore compression and performance on Yamaha YZ80 models from 1976 through 1980.

Overview

This Wiseco standard piston kit for Yamaha YZ80 delivers a 49.00 mm forged piston for top-end rebuilds on 1976-1980 machines. The kit, reference 457M04900, restores lost compression and keeps the 80cc two-stroke running the way it should. It suits riders and mechanics doing a routine top-end service or bringing an older YZ80 back into shape.

Built For Performance

• Forged piston construction for strength under high rpm two-stroke loads
• Standard 49.00 mm bore size matching the original cylinder dimensions
• Wiseco reference 457M04900 for straightforward cross-referencing
• Piston kit format includes the piston and matching components for assembly
• Designed specifically for Yamaha YZ80 applications from 1976 to 1980
• Precision machined skirt and ring grooves for consistent sealing

Fits These Machines

• for Yamaha YZ80 1976
• for Yamaha YZ80 1977
• for Yamaha YZ80 1978
• for Yamaha YZ80 1979
• for Yamaha YZ80 1980

On-The-Job Use

• Top-end rebuilds on 1976-1980 Yamaha YZ80 motocross bikes
• Restoring compression on high-hour two-stroke engines
• Routine piston replacement during a cylinder refresh
• Vintage YZ80 restoration projects
• Race prep for classic 80cc class machines

Specs At A Glance

Good To Know

Q: Is this piston a direct replacement for my YZ80? A: It is sized as a standard 49.00 mm piston for 1976-1980 Yamaha YZ80 models, so confirm your cylinder bore and serial number before ordering.

Q: Does a piston kit include rings and pin? A: A Wiseco piston kit typically ships with the piston, rings, wrist pin, and clips, but verify the contents listed for reference 457M04900 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.