2309M06600 Piston Kit for Yamaha SS440 1980-1985 Std 66.00 mm Wiseco

Wiseco Std Piston Kit for Yamaha SS440

This Wiseco standard piston kit for Yamaha SS440 snowmobiles restores factory bore compression, and it cross-references part number 2309M06600 with a 66.00 mm bore. The standard piston kit for Yamaha SS440 includes the piston, rings, wrist pin, and circlips for one cylinder. Owners rebuilding a worn top end on a 1980 through 1985 SS440 will find this standard piston kit for Yamaha SS440 a direct-fit replacement at the original bore size.

Overview

This Wiseco standard piston kit for Yamaha SS440 returns a snowmobile engine to its original 66.00 mm bore for a clean top-end rebuild. The standard size means no overbore is needed when the cylinder remains within spec after honing. It suits riders and mechanics servicing a 1980 to 1985 SS440.

Built For Performance

• Wiseco forged piston construction for strength in cold-start conditions
• Standard 66.00 mm bore size for original cylinder dimensions
• Includes piston, rings, wrist pin, and circlips for one cylinder
• Cross-references part number 2309M06600 for easy verification
• Machined ring grooves for consistent ring seal and compression
• Designed for the two-stroke engine used in SS440 snowmobiles

Fits These Machines

• for Yamaha SS440, 1980
• for Yamaha SS440, 1981
• for Yamaha SS440, 1982
• for Yamaha SS440, 1983
• for Yamaha SS440, 1984
• for Yamaha SS440, 1985

On-The-Job Use

• Top-end rebuild after low compression or a scored piston
• Cylinder hone service that stays within standard bore spec
• Vintage snowmobile engine repair and restoration
• Trail and recreation SS440 maintenance

Specs At A Glance

Good To Know

Q: Does this kit fit my SS440? A: It is listed for the 1980 through 1985 SS440 with a standard 66.00 mm bore, so confirm your model year and cylinder condition before ordering. Q: Is machine work required? A: A standard piston normally requires only a light hone if the cylinder is within spec, but a worn or scored bore may need to be bored oversize instead.

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