Rato ATW250 (RW171FMM)

Rato ATW250 (RW171FMM)The Rato ATW250 (RW171FMM) is a 229.6 cc (14.01 cu-in) single-cylinder air-cooled 4-stroke internal combustion vertical motorcycle engine, manufactured by Chongqing RATO Holding (Group) CO., LTD.

The Rato ATW250 is a new engine designed specifically for beach buggy with high safety factor. The engine uses transmission of inbuilt arc bevel gear free of maintenance, pollution with high efficiency and inbuilt balance system with little vibration and high-level comfortableness. The engine is equipped with capacitance discharge ignition system (CDI), electric or kick starter and 5-speed gearbox.

The engine cylinder bore is 71.0 mm (2.79 in) and piston stroke is 58.0 mm (2.28 in). The ATW250 (RW171FMM) produced 14.9 PS (11.0 kW; 14.7 HP) at 7,000 rpm of maximum horsepower and 15.5 N·m (1.58 kg·m, 11.4 ft·lb) at 6,000 rpm of torque.

General information

Engine Specifications
ModelATW250 (RW171FMM)
TypeVertical, four-stroke, single cylinder
Displacement229.6 ml (14.01 cu-in)
Max. horsepower14.9 PS (11.0 kW; 14.7 HP) at 7,000 rpm
Max. torque (crank PTO)15.5 N·m (1.58 kg·m, 11.4 ft·lb) at 6,000 rpm
ClutchDouble clutches
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 ATW250 (RW171FMM)
Length, mm (in)480 (18.9)
Width, mm (in)431 (17.0)
Height, mm (in)435 (17.1)
Dry weight, kg (lb)43.5 (95.9)

Service Information

Oil system
Oil capacity2.2 L
Ignition system
Spark plugB7RTC
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