Rato CG250 (RW167FMM)

Rato CG250 (RW167FMM)The Rato CG250 (RW167FMM) is a 229.2 ml (13.9 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 CG250 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 67 mm (2.64 in) and piston stroke is 65 mm (2.56 in). The CG250 (RW167FMM) produced 14.7 PS (10.8 kW; 14.5 HP) at 6,500 rpm of maximum horsepower and 16.5 N·m (1.68 kg·m, 12.17 ft·lb) at 5,500 rpm of torque.

General information

Engine Specifications
Model CG250 (RW167FMM)
Type Vertical, four-stroke, single cylinder
Displacement 229.2 ml (13.9 cu-in)
Max. horsepower 14.7 PS (10.8 kW; 14.5 HP) at 6,500 rpm
Max. torque (crank PTO) 16.5 N·m (1.68 kg·m, 12.17 ft·lb) at 5,500 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 CG250 (RW167FMM)
Length, mm (in) 358 (14.09)
Width, mm (in) 320 (12.6)
Height, mm (in) 425 (16.7)
Dry weight, kg (lb) 33 (2.7)

Service Information

Oil system
Oil capacity 1.0 L
Ignition system
Spark plug D8RTC
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    • This engine is used on the Janus Motorcycles and can achieve around 70 mph if you use the same sprockets front and rear (and assuming the bike frame is about the same weight, a heavier/lighter framed vehicle will affect performance. I’m 275 lbs, a lighter individual may be able to achieve a higher speed.

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