Cylinder Piston Gasket Top End Kit For Yamaha Kodiak 400 93-99 Big Bear400 00-12

Cylinder Piston Gasket Top End Kit for Yamaha Kodiak 400 Big Bear 400

This cylinder piston gasket top end kit for Yamaha rebuilds the upper engine on Kodiak 400 and Big Bear 400 ATVs, restoring compression with a fresh cylinder, piston, and sealing gasket set.

Overview

This top end kit for Yamaha Kodiak 400 and Big Bear 400 combines a replacement cylinder, piston, and gasket set to bring tired engines back to full compression. The top end kit for Yamaha Kodiak 400 serves riders handling their own rebuilds who want matched components that seal and fit together correctly. Everything needed to refresh the upper cylinder assembly arrives in one kit for Yamaha Big Bear 400 owners.

Built For Performance

• Cylinder bore sized for Yamaha 400 single-cylinder engines
• Piston machined to match the supplied cylinder
• Gasket set seals the cylinder base, head, and covers
• Top end kit arrives as a matched assembly for easier rebuilds
• Restores lost compression and power after ring wear

Fits These Machines

• for Yamaha Kodiak 400 1993-1999
• for Yamaha Big Bear 400 2000-2012

On-The-Job Use

• Top end rebuilds on worn 400cc Yamaha ATV engines
• Restoring compression for trail riding and farm work
• Replacing scored cylinders and worn pistons
• Preventive refresh on high-hour machines

Specs At A Glance

Good To Know

Q: Do I need to rejet or adjust anything after installing this kit? A: A stock replacement kit of the same bore normally runs on factory jetting, but confirm the bore size matches your engine before installation. Measure the original cylinder and piston before ordering.

Q: Is break-in required on a new piston and cylinder? A: Yes, a short break-in with varied throttle and an early oil change helps the rings seat properly. Follow your machine's service manual for torque values.

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