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
ModelCB125 (RW162MJ)
TypeVertical, four-stroke, single cylinder
Displacement124.1 ml (7.6 cu-in)
Max. horsepower10.2 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 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 consumption354 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 capacity1.0 L
Ignition system
Spark plugD8RTC
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