477M04850 Wiseco .060 Oversize Piston Kit 48.50mm for Yamaha YZ80 1982-1983

Piston Kit for Yamaha YZ80

This Wiseco .060 piston kit is a 48.50 mm oversize piston assembly for Yamaha YZ80 models, engineered to restore compression and top-end performance. It cross-references 477M04850 for accurate replacement matching.

Overview

This Wiseco .060 piston kit delivers a 48.50 mm oversize replacement piston for Yamaha YZ80 machines needing a top-end refresh. Riders and mechanics rely on the Wiseco .060 piston kit for its forged construction and precise bore sizing. It suits rebuilds where the cylinder has been machined .060 over stock.

Built For Performance

• Forged piston construction for added strength under high-rpm loads
• .060 oversize at 48.50 mm to match a rebored cylinder
• Designed as a direct replacement for the 477M04850 reference
• Suitable for two-stroke top-end rebuilds
• Precision machined for consistent ring seal and compression

Fits These Machines

• for Yamaha YZ80 1982
• for Yamaha YZ80 1983

On-The-Job Use

• Top-end rebuilds after cylinder boring
• Motocross and trail riding maintenance
• Restoring compression on worn two-stroke engines
• Race prep and engine refresh projects

Specs At A Glance

Good To Know

Q: Will this fit a stock cylinder? A: This piston is .060 oversize and requires the cylinder to be bored to match 48.50 mm. Confirm the current bore size before ordering.

Q: Is this a complete top-end kit? A: This listing covers the piston kit as described. Check whether gaskets, rings, or pins are included 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.