Rato CG125 (RW157FMI)

Rato CG125 (RW157FMI)The Rato CG125 (RW157FMI) is a 124.1 ml (7.6 cu-in) single-cylinder air-cooled 4-stroke internal combustion vertical motorcycle engine from Rato CG-series, manufactured by Chongqing RATO Holding (Group) CO., LTD.

The Rato CG125 engine uses rocker arm of cast iron and tappet of aluminum alloy; 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 49.5 mm (1.95 in). The CG125 (RW157FMI) produced 9.8 PS (7.2 kW; 9.7 HP) at 8,500 rpm of maximum horsepower and 8.6 N·m (0.87 kg·m, 6.34 ft·lb) of torque at 7,000 rpm.

General information

Engine Specifications
ModelCG125 (RW157FMI)
TypeVertical, four-stroke, single cylinder
Displacement124.1 ml (7.6 cu-in)
Max. horsepower9.8 PS (7.2 kW; 9.7 HP) at 8,500 rpm
Max. torque (crank PTO)8.6 N·m (0.87 kg·m, 6.34 ft·lb) at 7,000 rpm
Clutch methodManual wet multi-plate
Gearshift method5-speed gearshift
Cooling systemForced-air
Ignition systemCapacitance discharge ignition (CDI)
Lubricating systemSplash
Starting systemElectric / kick
Fuel usedUnleaded gasoline (octane number 86 or higher)
Fuel consumption367 g/kw·h

Dimensions and Weight

Rato CG125 (RW157FMI)
Length, mm (in)355 (14.0)
Width, mm (in)320 (12.6)
Height, mm (in)420 (16.5)
Dry weight, kg (lb)33 (72.7)

Service Information

Oil system
Oil capacity1.0 L
Ignition system
Spark plugD8RTC
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