Performance Upgrade Carburetor Stroke Engine Review

Complete performance upgarde kit for 47/49CC engines to increase 30% power of regular engine, please read description for more fitment info. With new style carburetor, hi-flow air filter, red performance ignition coil and durable 2-spring racing clutch pad for bigger torq transmission. With carbon fiber reed valve to improve high rev performance. The kit comes with 2 pieces of reed valve blocks, one with standard steel reed, 1 piece is with carbon fiber reed valve. Measurement: 44mm bore and pistion,12mm diameter piston wrist. Please check the size of piston wrist pin on your engine. This kit can NOT work with 40mm bore engine which with 10mm piston wrist. With enhanced and lengthened cylinder mounting bolt, 3-electrode spark plug for stronger ignition.