451M08550 Wiseco .020 Piston Kit for Yamaha YZ465 IT465 1980-1982 85.50 mm

Wiseco .020 Piston Kit for Yamaha YZ465 and IT465

This Wiseco .020 overbore piston kit for Yamaha YZ465 and IT465 models refreshes the top end on 1980-1982 machines, with the 85.50 mm piston cross-referencing 451M08550.

Overview

This Wiseco .020 piston kit for Yamaha YZ465 and IT465 machines is a forged top-end replacement sized for a 0.020 inch overbore. It serves riders and rebuilders working on 1980-1982 YZ465 and IT465 engines who want a reliable piston for Yamaha two-strokes. The 85.50 mm sizing and 451M08550 reference make matching to your cylinder straightforward.

Built For Performance

• Forged piston construction for durability under two-stroke heat and load
• .020 overbore sizing at 85.50 mm for a light cylinder cleanup
• Cross-references 451M08550 for simple parts identification
• Kit format groups the piston with its matching top-end components
• Engineered around 1980-1982 Yamaha YZ465 and IT465 dimensions

Fits These Machines

• for Yamaha YZ465, 1980
• for Yamaha YZ465, 1981
• for Yamaha YZ465, 1982
• for Yamaha IT465, 1980
• for Yamaha IT465, 1981
• for Yamaha IT465, 1982

On-The-Job Use

• Top-end rebuilds where a light overbore is needed
• Refresh work on cylinders with minor wear
• Keeping vintage YZ465 and IT465 motocross and enduro bikes running
• Garage and shop engine service projects

Specs At A Glance

Good To Know

Q: Will this kit work on both the YZ465 and IT465? A: It is listed for both models in the 1980-1982 range, but confirm your bore size and cylinder condition first. Q: What makes the .020 size different from a .040 kit? A: The .020 overbore removes less material, so measure your cylinder wear before choosing between the two.

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