CYLINDER KIT 02-18 YZ85 52.50mm, WORKS CYLINDER 21007-K01 BIG BORE

Cylinder Works +5mm Big Bore Complete Cylinder Kit for the 2002-2018 Yamaha YZ85 increases displacement to 103.5cc. This direct bolt-on upgrade requires no re-plating and includes all necessary components for installation. The cylinder is Nickel Silicon Carbide plated for durability and honed to exact size for easy piston installation. Note: The cylinder head must be modified for proper fitment.

Features

• Direct bolt-on installation with no additional machining required


• Nickel Silicon Carbide plated for extended lifespan


• Honed to exact size for easy piston installation


• Big bore design increases displacement to 103.5cc


• Includes all necessary components for installation


• Note: Cylinder head modification is required

Included Items

• Cylinder


• Piston


• Piston pin


• Two circlips


• Piston ring


• Gasket set

Specifications

• Bore: +5mm


• Displacement: 103.5cc


• Compression: Standard


• Uses Vertex Piston #23628

Cross-Reference OEM Part Numbers

• YAMAHA: 5PA-11311-00-00


• YAMAHA: 5PA-11311-01-00


• YAMAHA: 5PA-11311-10-00

Vehicle Fitments

• 2002-2018 Yamaha YZ85