451M08600 Wiseco .040 Piston Kit for Yamaha YZ465 IT465 1980-1982 86.00 mm

Wiseco .040 Piston Kit for Yamaha YZ465 and IT465

This Wiseco .040 overbore piston kit for Yamaha YZ465 and IT465 models restores top-end compression on 1980-1982 machines, with the 86.00 mm piston cross-referencing 451M08600.

Overview

This Wiseco .040 piston kit for Yamaha YZ465 and IT465 machines is a forged top-end replacement built to bring worn cylinders back to spec after a 0.040 inch overbore. The kit suits riders and rebuilders working on 1980-1982 YZ465 and IT465 engines who need a dependable piston for Yamaha two-strokes. Every component is selected to match the 86.00 mm bore size and the 451M08600 reference.

Built For Performance

• Forged piston construction for strength under high-rpm two-stroke loads
• .040 overbore sizing at 86.00 mm to clean up a worn or scored cylinder
• Cross-references 451M08600 for straightforward parts matching
• Kit format supplies the piston and matching top-end components together
• Built to suit 1980-1982 Yamaha YZ465 and IT465 engine architecture

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 after cylinder wear or scoring
• Overbore service work that requires a matched piston size
• Restoring compression on vintage YZ465 and IT465 motocross and enduro bikes
• Shop and home garage engine refresh projects

Specs At A Glance

Good To Know

Q: Does this piston kit fit both the YZ465 and the IT465? A: It is listed for both models across the 1980-1982 range, but bore and cylinder condition should be verified before ordering. Q: Is this a complete top-end kit? A: It is a Wiseco piston kit at .040 overbore, so check the contents against what your rebuild requires.

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