Gives your bike the Factory Works look and sets your ride apart from the rest with the ultimate in race performance. Boyesen Factory Ignition 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. Comes with an asbestos-free gasket that's bound with nitrile for a tight, leak-free seal. Fits: Yamaha PW50 81-21