... enameled wire by computer,provide high peak voltage of secondary coil, sufficient ignition energy.2. Sealed under vacuum environment, high insulation ... Transmission system:Chain, sprocket, bearing, wheel, tires, rims, and others. Engine parts:Cylinder block, cylinder head, crankshaft, camshaft, piston, piston ring ... you choose the trusty!Welcome to inquiry us!! YBR125 motorcycle ignition coil