... coupled with valve oil seal(pic as below) 4.customer logo in head motorcycle engine valve 150cc, motorcycle engine valve, ... °C, intake valve 300~500°CEngine valve head with customer logoEngine valve pole platingEngine valve treatment nitriding, ... systemChain, sprocket, bearing, wheel, tires, rims, and others.Engine partsCylinder block, cylinder head, crankshaft, camshaft, piston, piston ring ...