Rato CG125 (RW157FMI)

Rato CG125 (RW157FMI)The Rato CG125 (RW157FMI) is a 124.1 ml (7.6 cu-in) single-cylinder air-cooled 4-stroke internal combustion vertical motorcycle engine from Rato CG-series, manufactured by Chongqing RATO Holding (Group) CO., LTD.

The Rato CG125 engine uses rocker arm of cast iron and tappet of aluminum alloy; capacitance discharge ignition system and electric or kick start. The engine is equipped with a 5-speed gearbox.

The engine cylinder bore is 56.5 mm (2.22 in) and piston stroke is 49.5 mm (1.95 in). The CG125 (RW157FMI) produced 9.8 PS (7.2 kW; 9.7 HP) at 8,500 rpm of maximum horsepower and 8.6 N·m (0.87 kg·m, 6.34 ft·lb) of torque at 7,000 rpm.

General information

Engine Specifications
ModelCG125 (RW157FMI)
TypeVertical, four-stroke, single cylinder
Displacement124.1 ml (7.6 cu-in)
Max. horsepower9.8 PS (7.2 kW; 9.7 HP) at 8,500 rpm
Max. torque (crank PTO)8.6 N·m (0.87 kg·m, 6.34 ft·lb) at 7,000 rpm
Clutch methodManual wet multi-plate
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 consumption367 g/kw·h

Dimensions and Weight

Rato CG125 (RW157FMI)
Length, mm (in)355 (14.0)
Width, mm (in)320 (12.6)
Height, mm (in)420 (16.5)
Dry weight, kg (lb)33 (72.7)

Service Information

Oil system
Oil capacity1.0 L
Ignition system
Spark plugD8RTC
Author: Sergei Wers
About: Co-founder and CEO of a multi-brand auto repair shop (engine repair, chassis repair, body repair and painting) for over 15 years. I have been developing internet sites with technical specifications for more than seven years.

ATTENTION! Dear visitors, this site is not a trading platform, an official dealer or a spare parts supplier, so we do not have any price lists or spare parts catalogs. We are an information portal and provide the technical specifications of gasoline and diesel engines.

We try to use verified sources and official documentation, however, differences between sources or errors in entering information may occur. We do not provide advice on technical issues related to the engines operation or repair. We do not recommend using provided information for engines repairing engines or spare parts ordering, use only official service manuals and spare-parts catalogs.

1 Comment

Leave a Reply

Your email address will not be published.