2284M06950 Wiseco Piston Kit 69.50mm .060 for Yamaha GP440 1976-1977

Piston Kit for Yamaha GP440

This Wiseco piston kit with a 69.50 mm bore size, cross-referencing part 2284M06950, is a replacement top-end component that restores compression and power to your snowmobile engine.

Overview

This Wiseco piston kit is a .060 oversize replacement built for the Yamaha GP440 engine, giving worn or scored cylinders a fresh top end. The 69.50 mm piston kit, part 2284M06950, restores proper combustion and compression so your snowmobile runs strong again. It suits riders and mechanics rebuilding a 1976 to 1977 GP440 engine who want a dependable forged piston kit.

Built For Performance

• Forged piston construction for strength under high heat and load
• 69.50 mm oversize bore for worn or rebored cylinders
• Wiseco part 2284M06950 matched to the Yamaha GP440 engine
• Kit includes piston, rings, wrist pin, and circlips for a complete top-end refresh
• Precision machined for consistent fit and ring seal

Fits These Machines

• for Yamaha GP440 1976
• for Yamaha GP440 1977

On-The-Job Use

• Top-end rebuilds after piston scoring or seizure
• Bore-out jobs requiring an oversize piston
• Restoring compression on high-mileage snowmobile engines
• Seasonal maintenance before winter riding

Specs At A Glance

Good To Know

Q: Will this piston kit fit my stock cylinder? A: This is a .060 oversize kit, so the cylinder must be bored and honed to 69.50 mm before installation. Confirm your engine's current bore before ordering.

Q: What is included in this Wiseco kit? A: The kit supplies the piston along with rings, wrist pin, and circlips needed for a top-end rebuild. Check your specific build to confirm any additional gaskets or bearings you may need.

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