25cc gas engine (without clutch)Performance:1) Type: 2-stroke engine2) Cooling system: forced-air3) Bore x stroke: 33.35 x 28.4mm4) Displacement: 25cc5) Max. power: 0.72kW/7,500-8,000rpm6) Max. torque: 1.1N.m/6,500rpm7) Fuel used: automotive unleaded gasoline (min. 90 pump octane)8) Fuel tank capacity: 0.6L9) Start: recoil start10) Carburetor: diaphragm11) Spark plug: TORCH L8RTC12) Lubricating oil: lubricating oil special for 2-stroke engine13) Mixed ratio: 40:1