Detailed Product Description Complete Specifications: 1. Engine type :50cc/70cc/90cc/110cc,4 storke 2. Bore and stroke :39x41.4/47x41.4/47x49.5/52.4x49.5 3. Compression rating :8.8:1 4. Max torque :4.2nm/5000rpm , 4.2nm/5000rpm, 5.2nm/5000rpm, 5.5nm/5000rpm 5. Max power :3.0kw/8500rpm/ ,3.0kw/7500rpm,3.3kw/7500rpm,3.6kw/7500rpm, 6. Ignition type :cdi 7. Transmission :automatic/(4-speed,semi- ...