Rato CB125 (RW162MJ)

Rato CB125 (RW162MJ)The Rato CB125 (RW162MJ) is a 124.1 ml (7.6 cu-in) single-cylinder air-cooled 4-stroke internal combustion vertical motorcycle engine from Rato CB-series, manufactured by Chongqing RATO Holding (Group) CO., LTD.

The Rato CB125 engine uses the dual-cam valve for valve gear with chain transmission to improve the efficiency of valve gear and reduce the noise of complete machine; increased the diameter of the left crankshaft; 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 CB125 (RW162MJ) produced 10.2 PS (7.5 kW; 10.0 HP) at 8,500 rpm of maximum horsepower and 8.5 N·m (0.87 kg·m, 6.27 ft·lb) of torque at 7,000 rpm.

General information

Engine Specifications
Model CB125 (RW162MJ)
Type Vertical, four-stroke, single cylinder
Displacement 124.1 ml (7.6 cu-in)
Max. horsepower 10.2 PS (7.5 kW; 10.0 HP) at 8,500 rpm
Max. torque (crank PTO) 8.5 N·m (0.87 kg·m, 6.27 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 CB125 (RW162MJ)
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)

Service Information

Oil system
Oil capacity 1.0 L
Ignition system
Spark plug D8RTC
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