For 2002-2020 Yamaha YZ85 YZ-85 Top End Rebuild Kit Stock Bore Cylinder Assembly

Top End Rebuild Kit for Yamaha YZ85

This top end rebuild kit restores the cylinder assembly on Yamaha YZ85 and YZ-85 machines, supplying a stock bore cylinder assembly as a direct replacement for worn or damaged top end components.

Overview

This top end rebuild kit is built for the Yamaha YZ85 and YZ-85, delivering a stock bore cylinder assembly to bring the engine top end back to working condition. The kit addresses the cylinder and matching top end components so riders can complete a rebuild without hunting down individual pieces. Intended for Yamaha YZ85 owners handling routine maintenance or recovering from a seized or scored top end.

Built For Performance

• Stock bore cylinder assembly matches the original bore size for a direct rebuild
• Top end rebuild kit covers the components needed to refresh the cylinder assembly
• Designed around the Yamaha YZ85 and YZ-85 platform
• Stock bore sizing keeps the engine within factory displacement
• Complete kit format reduces the need to source parts separately

Fits These Machines

• for Yamaha YZ85 2002-2020
• for Yamaha YZ-85 2002-2020

On-The-Job Use

• Top end rebuild after a seizure or loss of compression
• Routine refresh of the cylinder assembly on a YZ85
• Restoring a race or practice bike to running condition
• Replacing a scored or worn stock bore cylinder

Specs At A Glance

Good To Know

Q: Does this kit fit all YZ85 years? A: It is listed for Yamaha YZ85 and YZ-85 models from 2002 through 2020. Confirm your model year and serial number before ordering.

Q: Is this a stock bore setup? A: Yes, the kit supplies a stock bore cylinder assembly rather than an overbore. That keeps displacement at the factory spec for the YZ85.

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