The Rato 125CC engine is equipped with CDI (capacitance discharge ignition system), the manual wet multi-plate clutch, electric or kick starter and 4-international gearbox. The engine uses a specific style for left cover with unique appearance; various style of the right cover.
The engine cylinder bore is 52.4 mm (2.06 in) and the piston stroke is 57.0 mm (2.24 in). The 125CC (RW152FMI-2) produced 8.3 PS (6.1 kW; 8.2 HP) at 7,500 rpm of maximum horsepower and 9.0 N·m (0.92 kg·m, 6.64 ft·lb) at 5,500 rpm of torque .
|Type||Vertical, four-stroke, single cylinder|
|Displacement||122.9 cc (7.5 cu-in)|
|Max. horsepower||8.3 PS (6.1 kW; 8.2 HP) at 7,500 rpm|
|Max. torque (crank PTO)||9.0 N·m (0.92 kg·m, 6.64 ft·lb) at 5,500 rpm|
|Clutch method||Manual wet multi-plate|
|Ignition system||Capacitance discharge ignition (CDI)|
|Starting system||Electric or kick|
|Fuel used||Unleaded gasoline (octane number 86 or higher)|
|Fuel consumption||367 g/kw·h|
|Oil capacity||1.0 L|