New style water-cooled engine, with CNC parts, more powerful, also with gear inside the engine Features:1) Engine: 40cc water-cooled, single cylinder, 2- ... stroke2) Fuel type: petrol, 1:25 engine, oil mixing3) ... disc brake (manual)9) Rated power and rotate speed: 4.5kW/12,000rpm10) Max. torque and rotate speed: 4N. ...