Boyesen CC-38CB Black 'Factory Racing' Clutch Cover Fits: Yamaha YZ450F 2010 Gives your bike the Factory Works look and sets your ride apart from the rest with the ultimate in race performance Boyesen clutch covers are cast from the highest grade of lightweight aluminum, providing solid engine protection and are guaranteed not to warp Individually surfaced to insure a perfect fit and seal properly, guarding the inside of engine from dirt and water; super tough powder coating resists wear and tear, outlasting stock covers Asbestos-free gasket is bound with nitrile for tight, leak-free seal