560M07000 Wiseco .080 Piston Kit for Yamaha YZ250 1983-1987 70.00mm

Piston Kit for Yamaha

This 70.00 mm piston kit is built to refresh the top end of a Yamaha YZ250, restoring compression and reliable power; it matches Wiseco reference 560M07000 at a .080 oversize bore.

Overview

This piston kit is a direct top-end replacement that restores compression, ring seal, and performance in a worn cylinder. Sized at 70.00 mm with a .080 oversize bore, this piston kit for Yamaha YZ250 two-strokes helps riders rebuild with confidence. It is built for riders and mechanics rebuilding a vintage YZ250 engine.

Built For Performance

• 70.00 mm bore diameter at .080 oversize
• Wiseco reference 560M07000 for easy cross-checking
• Forged piston construction built for two-stroke use
• Matched ring set for proper cylinder seal
• Wrist pin and circlips included in the kit
• Designed to restore factory-style compression

Fits These Machines

• for Yamaha YZ250 1983
• for Yamaha YZ250 1984
• for Yamaha YZ250 1985
• for Yamaha YZ250 1986
• for Yamaha YZ250 1987

On-The-Job Use

• Top-end rebuild after a cylinder bore or hone
• Restoring compression on a tired two-stroke engine
• Routine race-season maintenance on vintage motocross bikes

Specs At A Glance

Good To Know

Q: What does the .080 oversize mean? A: The piston is sized larger to match a cylinder that has been bored oversize for proper clearance. A: Always measure the bore before ordering.

Q: Does this kit include rings and pin? A: Yes, this piston kit ships with the matching ring set, wrist pin, and circlips for installation.

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