2284M06850 .020 Piston Kit for Yamaha SS440 1980-1981 68.50 mm

Piston Kit for Yamaha SS440

Wiseco Piston Kit with a 68.50 mm bore size (.020 oversize) for Yamaha SS440 snowmobiles, cross-referencing part number 2284M06850, designed to restore top-end compression and engine performance.

Overview

This Wiseco Piston Kit for Yamaha SS440 delivers a 68.50 mm bore size with a .020 oversize fit, restoring compression and performance in your snowmobile engine. Each kit includes a forged piston designed for the 1980-1981 Yamaha SS440. Built to replace worn or damaged top-end components, this piston kit for Yamaha SS440 is suited to riders and mechanics handling a rebuild or top-end refresh.

Built For Performance

• 68.50 mm bore diameter with .020 oversize fitment for worn cylinders
• Forged piston construction for strength under high heat and load
• Cross-references Wiseco part number 2284M06850
• Designed to restore compression and combustion efficiency
• Kit includes piston and components needed for a top-end rebuild

Fits These Machines

• for Yamaha SS440 1980
• for Yamaha SS440 1981

On-The-Job Use

• Top-end rebuilds on 1980-1981 Yamaha SS440 snowmobiles
• Replacing scored or worn pistons after engine inspection
• Restoring compression in high-mileage engines
• Routine maintenance for vintage Yamaha snowmobile owners

Specs At A Glance

Good To Know

Q: Does this piston kit require cylinder boring? A: A .020 oversize piston typically requires the cylinder to be bored and honed to match the 68.50 mm diameter for proper clearance.

Q: What is included in this kit? A: This Wiseco piston kit includes the forged piston and related top-end components, though exact contents can vary, so confirm the listing details before ordering.

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