83mm Bore Top End Kit w/ Cylinder For Yamaha Big Bear 400 YFM 400 2000-2012 ATV

83mm Bore Top End Kit with Cylinder for Yamaha Big Bear 400

This 83mm bore top end kit with cylinder provides the upper engine components for Yamaha Big Bear 400 YFM 400 models from 2000 through 2012, helping restore compression and reliable performance.

Overview

This 83mm bore top end kit with cylinder covers the upper engine rebuild for a Yamaha Big Bear 400 YFM 400. The cylinder and matching piston work together to bring back compression and smooth running after wear. It is aimed at owners and mechanics servicing 2000 to 2012 Big Bear 400 ATVs.

Built For Performance

• 83mm bore cylinder for a defined, consistent bore size
• Piston matched to the 83mm bore for dependable sealing
• Gasket components included for sealing during reassembly
• Built for the Yamaha Big Bear 400 YFM 400 platform
• Complete kit format avoids sourcing separate top end parts

Fits These Machines

• for Yamaha Big Bear 400 YFM 400 (2000-2012)

On-The-Job Use

• Top end rebuild after compression loss or piston wear
• Engine refresh on a working Big Bear 400 ATV
• Trail, farm, and utility ATV repairs
• Home garage or shop engine service

Specs At A Glance

Good To Know

Q: What does the 83mm bore mean for my Big Bear 400? A: It states the cylinder bore diameter this top end kit is built around. Match it to your engine before ordering.

Q: Will this kit fit my Yamaha Big Bear 400? A: It is intended for the YFM 400 from 2000 to 2012. Check your model year and serial number to confirm compatibility.

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