The Rato 125CC (RW154FMI) is a 123.7 cc (7.55 cu-in) single-cylinder air-cooled 4-stroke internal combustion horizontal motorcycle engine manufactured by Chongqing RATO Holding (Group) CO., LTD.
The Rato 125CC engine is equipped with CDI (capacitance discharge ignition system), the manual wet multi-plate clutch, electric or kick starter and 4-speed gearshift. The engine uses various styles of right and left covers. The top of the motor is protected from water and foreign particle, low fault rate and long lifetime.
Bore and stroke are 54.0 mm (2.13 in) and 54.0 mm (2.13 in), respectively. The 125CC (RW154FMI) produced 8.3 PS (6.1 KW; 8.2 HP) at 7,500 rpm of maximum horsepower and 9.0 Nm (0.92 kg·m; 6.64 ft·lb) at 5,500 rpm of torque .
General information
| Engine Specifications | |
| Model | 125CC (RW154FMI) |
| Type | Vertical, four-stroke, single cylinder |
| Displacement | 123.7 cc (7.55 cu-in) |
| Max. horsepower | 8.3 PS (6.1 KW; 8.2 HP) at 7,500 rpm |
| Max. torque (crank PTO) | 9.0 Nm (0.92 kg·m; 6.64 ft·lb) at 5,500 rpm |
| Clutch method | Manual wet multi-plate |
| Gearshift method | 4-speed gearshift |
| Cooling system | Forced-air |
| Ignition system | Capacitance discharge ignition (CDI) |
| Lubricating system | Splash |
| Starting system | Electric or kick |
| Fuel used | Unleaded gasoline (octane number 86 or higher) |
| Fuel consumption | 367 g/kw·h |
Dimensions and Weight
| Rato 125CC (RW154FMI) | |
| Length, mm (in) | 470 (18.5) |
| Width, mm (in) | 310 (12.2) |
| Height, mm (in) | 260 (10.2) |
| Dry weight, kg (lb) | 25 (55.1) |
Service Information
| Oil system | |
| Oil capacity | 1.0 L |
| Ignition system | |
| Spark plug | A7RTC |
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