Rato CGP125 (RW157FMI)

Rato CGP125 (RW157FMI)The Rato CGP125 (RW157FMI) is a 124.1 ml (7.6 cu-in) single-cylinder air-cooled 4-stroke internal combustion vertical motorcycle engine from Rato CGP-series, manufactured by Chongqing RATO Holding (Group) CO., LTD.

The Rato CGP125 engine uses the front structure of balance shaft to reduce engine vibration and improve stability; hot charging technique of crank and case to reduce the crank noise and extend lifetime. The engine is equipped with capacitance discharge ignition system (CDI), electric or kick starter and 5-speed gearbox with a manual wet multi-plate clutch.

The engine cylinder bore is 56.5 mm (2.22 in) and piston stroke is 49.5 mm (1.95 in). The CGP125 (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
Model CGP125 (RW157FMI)
Type Vertical, four-stroke, single cylinder
Displacement 124.1 ml (7.6 cu-in)
Max. horsepower 9.8 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 method Manual wet multi-plate
Gearshift method 5-speed gearshift
Cooling system Forced-air
Ignition system Capacitance discharge ignition (CDI)
Lubricating system Splash
Starting system Electric / kick
Fuel used Unleaded gasoline (octane number 86 or higher)
Fuel consumption 354 g/kw·h

Dimensions and Weight

Rato CGP125 (RW157FMI)
Length, mm (in) 355 (13.9)
Width, mm (in) 320 (12.6)
Height, mm (in) 420 (16.5)
Dry weight, kg (lb) 28 (61.7)

Service Information

Oil system
Oil capacity 1.3 L
Ignition system
Spark plug D8RTC
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