For Yamaha Big Bear 350 YFM350 4x4 Cylinder Piston Gaskets Top End Kit 1987-99

Top End Kit for Yamaha Big Bear 350

This top end kit includes the cylinder, piston, and gaskets needed to rebuild the upper engine on a Yamaha Big Bear 350 YFM350 4x4, restoring lost compression and dependable power.

Overview

This top end kit gives Yamaha Big Bear 350 YFM350 4x4 owners the core components for an upper engine rebuild in one package. The cylinder, piston, and gasket set work together to renew the combustion chamber and seal the top end against leaks. It is intended for riders and mechanics handling a worn or damaged top end on 1987 through 1999 models.

Built For Performance

• Cylinder bore sized for the YFM350 4x4 engine platform
• Piston matched to the cylinder for a consistent fit
• Complete gasket set to seal the top end during reassembly
• Components supplied together for a full upper engine refresh
• Built to original equipment dimensions for drop-in installation

Fits These Machines

• for Yamaha Big Bear 350 YFM350 4x4 1987-1999

On-The-Job Use

• Rebuilding an engine that has lost compression
• Replacing a scored or worn cylinder and piston
• Refreshing the top end before trail season
• Restoring power on a high-hour utility ATV

Specs At A Glance

Good To Know

Q: What is included in this top end kit? A: The kit supplies the cylinder, piston, and gasket set for the upper engine rebuild. Check the listing details for the exact components in your package.

Q: How do I know it fits my Big Bear 350? A: It is listed for the Yamaha Big Bear 350 YFM350 4x4 from 1987 through 1999. Verify your model and year 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.