* Capacitive Discharge Ignition (CDI) of engine kits for bikes assembly provide easy start and powerful performance and low fuel cost. * The latest high compression slant head spark plug is for extra boost and throttle response. * Our engine kits for bikes carburetor has an air-tight design to avoid upsetting the fuel air ratio which can cause engine to overheat, poor performance, or excess vibration. * engine kits for bikes with fuel filter to provide clean fuel, and chrome plated exhaust muffler to expel exhaust. * Heavy duty standard 415 chain& come with all necessary mounting accessories.