Tusk Clutch Cover Gasket - Fits: Yamaha YFZ 450 2012-2013 The Tusk gasket will match your machines requirements (same as stock). Replacing the clutch cover gasket is a must whenever the cover is removed to ensure proper sealing. Tusk Clutch Cover Gaskets are made from quality materials to meet or exceed OEM requirements but at a better price. The clutch cover gasket will match your machines requirements (synthetic fiber type or rubber O-ring type). Gaskets should always be replaced when installing a new clutch or anytime the clutch cover is removed.