The Rato CB250 (RW167MM) is a 223.1 ml (13.6 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 CB250 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 65.5 mm (2.57 in) and piston stroke is 66.2 mm (2.60 in). The CB250 (RW167MM) produced 16.3 PS (12.0 kW; 16.1 HP) at 8,000 rpm of maximum horsepower and 17.0 N·m (1.73 kg·m, 12.5 ft·lb) at 6,500 rpm of torque.
|Type||Vertical, four-stroke, single cylinder|
|Displacement||223.1 ml (13.6 cu-in)|
|Max. horsepower||16.3 PS (12.0 kW; 16.1 HP) at 8,000 rpm|
|Max. torque (crank PTO)||17.0 N·m (1.73 kg·m, 12.5 ft·lb) at 6,500 rpm|
|Clutch method||Manual wet multi-plate|
|Gearshift method||5-speed gearshift|
|Ignition system||Capacitance discharge ignition (CDI)|
|Starting system||Electric / kick|
|Fuel used||Unleaded gasoline (octane number 86 or higher)|
|Fuel consumption||354 g/kw·h|
Dimensions and Weight
|Rato CB250 (RW167MM)|
|Length, mm (in)||357 (14.0)|
|Width, mm (in)||320 (12.6)|
|Height, mm (in)||437 (17.2)|
|Dry weight, kg (lb)||33 (74.9)|
|Oil capacity||1.0 L|