The Rato CGS125 (RW157FMI) is a 124.9 ml (7.62 cu-in) single-cylinder air-cooled 4-stroke internal combustion vertical motorcycle engine from Rato CGS-series, manufactured by Chongqing RATO Holding (Group) CO., LTD.
The Rato CGS125 engine uses the light piston to reduce the reciprocating inertia of piston motion and improve the engine performance; capacitance discharge ignition system and electric or kick start. The engine is equipped with a 5-speed gearbox.
The engine cylinder bore is 56.5 mm (2.22 in) and piston stroke is 49.8 mm (1.96 in). The CGS125 (RW157FMI) produced 10.5 PS (7.7 kW; 10.3 HP) at 8,500 rpm of maximum horsepower and 9.0 N·m (0.92 kg·m, 6.64 ft·lb) of torque at 7,000 rpm.
|Type||Vertical, four-stroke, single cylinder|
|Displacement||124.9 ml (7.62 cu-in)|
|Max. horsepower||10.5 PS (7.7 kW; 10.3 HP) at 8,500 rpm|
|Max. torque (crank PTO)||9.0 N·m (0.92 kg·m, 6.64 ft·lb) at 7,000 rpm|
|Clutch method||Manual wet multi-plate|
|Ignition system||Capacitance discharge ignition (CDI)|
|Starting system||Electric / kick|
|Fuel used||Unleaded gasoline (octane number 86 or higher)|
|Fuel consumption||354 g/kw·h|
Dimensions and Weight
|Rato CGS125 (RW157FMI)|
|Length, mm (in)||355 (14.0)|
|Width, mm (in)||320 (12.6)|
|Height, mm (in)||420 (16.5)|
|Dry weight, kg (lb)||30 (66.1)|
|Oil capacity||1.0 L|