... nut, manifold, retaining plate, sring lock washer, cheese head screw, o-seal,screw plug, cover plug, cylinder ... hexagon bolt, plain washer, tooth lock washer, cylinder head bolt, straight pin, sleeve,packing compound, crankcase end cover ... snap ring, cylinder head cover, valve seat intake, valve seat exhaust, cover, valve guide, outer valve spring, inner valve spring, valve collect, pipe connection ...