CYLINDER KIT YZF250 01-13, WORKS CYLINDER WORKS 21002-K01, 80mm 270cc WRF250 2001-2013

The +3mm Big Bore Cylinder Kit (Part Number: 21002-K01) is a high-performance upgrade designed for Yamaha WR250F and YZ250F models from 2001 to 2013. This kit increases engine displacement to 269cc with a 12.5:1 compression ratio, delivering improved power and performance without requiring any additional machine work. It is a direct bolt-on solution, featuring a Nickel Silicon Carbide plated bore for durability and precise honing for easy piston installation.

Features:

• (+3mm Big Bore Kit) increases displacement to 269cc with a 12.5:1 compression ratio.


• Direct bolt-on installation with no replating required.


• Nickel Silicon Carbide plated bore ensures long-lasting performance.


• Honed to exact specifications for seamless piston installation.


• Includes all components necessary for installation.

Package Includes:

• Cylinder


• Piston


• Rings


• Pin


• Clips


• Gaskets

Vehicle Compatibility:

• Yamaha WR250F: 2001–2013


• Yamaha YZ250F: 2001–2013


• Yamaha YZ250FSP 50th Anniversary Edition: 2006

Cross-Reference Part Numbers:

• YAMAHA: 5NL-11311-00-00


• YAMAHA: 5UL-11311-00-00


• YAMAHA: 5XC-11311-00-00


• YAMAHA: 5XC-11311-01-00


• YAMAHA: 5XC-11311-10-00