Rato 90CC (RW147FMF)

Rato 90CC (RW147FMF)The Rato 90CC (RW147FMF) is a 85.9 cc (5.24 cu-in) single-cylinder air-cooled 4-stroke internal combustion horizontal motorcycle engine manufactured by Chongqing RATO Holding (Group) CO., LTD.

The Rato 90CC engine is equipped with CDI (capacitance discharge ignition system), automatic centrifugal wet multi-plate clutch, electric starter; single stage gearbox. The engine uses the design of a centrifugal clutch to realize the gearshift only by the accelerator.

Bore and stroke are 47 mm (1.85 in) and 49.5 mm (1.95 in), respectively. The 90CC (RW147FMF) produced 5.4 PS (4.0 kW; 5.4 HP) at 7,500 rpm of maximum horsepower and 5.6 Nm (0.57 kg·m; 4.13 ft·lb) at 5,500 rpm of torque .

General information

Engine Specifications
Model 90CC (RW147FMF)
Type Vertical, four-stroke, single cylinder
Displacement 85.9 cc (5.24 cu-in)
Max. horsepower 5.4 PS (4.0 KW; 5.4 HP) at 7,500 rpm
Max. torque (crank PTO) 5.6 Nm (0.57 kg·m; 4.13 ft·lb) at 5,500 rpm
Clutch method Automatic wet multi-plate
Gearshift method Single stage
Cooling system Forced-air
Ignition system Capacitance discharge ignition (CDI)
Lubricating system Splash
Starting system Electric
Fuel used Unleaded gasoline (octane number 86 or higher)
Fuel consumption 367 g/kw·h

Dimensions and Weight

Rato 90CC (RW147FMF)
Length, mm (in) 450 (17.7)
Width, mm (in) 310 (12.2)
Height, mm (in) 260 (10.2)
Dry weight, kg (lb) 18.0 (39.7)

Service Information

Oil system
Oil capacity 0.8 L
Ignition system
Spark plug A7RTC
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