The Rato C123 (RW152FMI-2) is a 122.9 cc (7.5 cu-in) single-cylinder air-cooled 4-stroke internal combustion horizontal motorcycle engine manufactured by Chongqing RATO Holding (Group) CO., LTD.
The Rato C123 engine uses CDI (capacitance discharge ignition system), electric or kick starter, dual clutches and 4-speed gearbox（with sophisticated protection).
The engine cylinder bore is 52.4 mm (2.06 in) and piston stroke is 57.0 mm (2.24 in). The C123 (RW152FMI-2) produced 8.3 PS (6.1 kW; 8.2 HP) at 7,500 rpm of maximum horsepower and 9.0 N·m (0.92 kg·m, 6.64 ft·lb) at 5,500 rpm of torque.
Vertical, four-stroke, single cylinder
122.9 cc (7.5 cu-in)
8.3 PS (6.1 kW; 8.2 HP) at 7,500 rpm
Max. torque (crank PTO)
9.0 N·m (0.92 kg·m, 6.64 ft·lb) at 5,500 rpm
4-speed gearshift（with sophisticated protection
Capacitance discharge ignition (CDI)
Electric / kick
Unleaded gasoline (octane number 86 or higher)
Dimensions and Weight
Rato C123 (RW152FMI-2)
Length, mm (in)
Width, mm (in)
Height, mm (in)
Dry weight, kg (lb)
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