21003-K01 Cylinder Works Big Bore Cylinder Kit Compatible with/Replacement for For Yamaha 2S2-11311-00-00, 21003-K01

For those looking to create the ultimate high-performance machine, this 3mm over Big Bore Kit making 478cc with 12.5:1 compression will give you the increase in horsepower and torque you are looking for. The cast aluminum cylinder is Nickel Silicon Carbide (NSC) electroplated, providing a durable, low friction, wear resistant surface with oil retention capabilities, and allows for greater heat dissipation to the water jacket. Cylinder Works kits come with a Vertex piston that is forged for superior strength and durability, and is molybdenum disulphide coating for reduced wear and faster break in. Kit includes cylinder, piston, rings, wristpin, circlips, and special gasket kit with full instructions. Plus, no machine work to your engine or cases is required. Fits: Yamaha WR 450F 2007-2012, YZ 450F 2006-2009.

• Spec: Description: Big Bore Cylinder Kit, Cylinder Diameter: 98mm, Cylinder Kit Type: Big Bore, Displacement: 478cc, Engine Type: 4-Cycle, Kit Includes: Cylinder, Piston Kit, & Top-End Gasket Kit, Notes: Uses Vertex #23404.
• Replaces OEM Numbers: YAMAHA: 2S2-11311-00-00, 2S2-11311-10-00
• Fits: Yamaha WR 450 F 2007-2015, YZ 450 F 2006-2009
• 1-year warranty protects you after your purchase. We're confident that our products will work flawlessly once installed in your vehicle. But in a rare case that it does not, we'll replace it anytime within one year of your order. If you have a problem, we will take every step to assist you, contact us for a replacement.
• 100% New aftermarket Big Bore Cylinder Kit Compatible with/Replacement for for Yamaha