Motorcycles Specs > Yamaha > Yamaha ST 125

Yamaha ST 125 Specs

The Yamaha ST 125 model is a Sport bike manufactured by Yamaha . In this version sold from year 1998 , the dry weight is 110.0 kg (242.5 pounds) and it is equipped with a Single cylinder, two-stroke motor. The engine produces a maximum peak output power of 36.00 HP (26.3 kW) and a maximum torque of  . With this drive-train, the Yamaha ST 125 is capable of reaching a maximum top speed of 160.0 km/h (99.4 mph) . On the topic of chassis characteristics, responsible for road holding, handling behavior and ride comfort, the Yamaha ST 125 has a steel deltabox frame with front suspension being rwu forks and at the rear, it is equipped with monoshock . Stock tire sizes are  on the front, and  on the rear. As for stopping power, the Yamaha ST 125 braking system includes Single disc. twin piston caliper size  at the front and Single disc. twin piston caliper size  at the back. 

Yamaha ST 125 General Information

Brand Yamaha 
Model Yamaha ST 125 
Start year 1998 
Year 1998 
Category Sport 
Factory Warranty (Years / miles)

Yamaha ST 125 Dimensions, Aerodynamics and weight

Frame type steel deltabox 
Seat details
Seat Height
Alternate Seat Height
Ground Clearance
Trail size
Wheels details
Front Tyres - Rims dimensions
Rear Tyres - Rims dimensions
Front brakes Single disc. twin piston caliper 
Rear brakes Single disc. twin piston caliper 
Front Brakes Dimensions - Disc Dimensions
Rear Brakes Dimensions - Disc Dimensions
Curb Weight (including fluids)
Dry Weight 110.0 kg (242.5 pounds) 
Front Percentage of Weight
Rear Percentage of Weight
Weight-Power Output Ratio : 0.3273 HP/kg 
Fuel Tank Capacity 10.00 litres (2.64 gallons) 
Reserve Fuel Capacity
Carrying Details and Capacity
Front Suspension rwu forks 
Front Suspension Travel
Rear Suspension monoshock 
Rear Suspension Travel

Yamaha ST 125 Engine and Transmission Technical Data

Engine type - Number of cylinders Single cylinder, two-stroke 
Engine details
Fuel system Carburettor. mikuni 
Engine size - Displacement - Engine capacity 125.00 ccm (7.63 cubic inches) 
Bore x Stroke
Compression Ratio
Number of valves per cylinder
Camshaft Valvetrain Configuration Port control 
Maximum power - Output - Horsepower 36.00 HP (26.3 kW) 
Maximum torque
Engine Maximum RPM 11000 
Cooling system Liquid 
Lubrication system oil injection 
Engine oil capacity
Exhaust system single expansion chamber and muffler 
Gearbox 6-speed 
Transmission type, final drive ratio Chain 
Clutch type wet plate 

Yamaha ST 125 Performance

Top Speed 160.0 km/h (99.4 mph) 
Acceleration 0 to 100 km/h (0 to 62 mph)
Acceleration 0 to 400m (1/4 mile)
Recuperation 60 to 140 km/h in highest gear
Fuel Consumption - MPG - Economy - Efficiency 8.00 litres/100 km (12.5 km/l or 29.40 mpg) 
CO2 emissions 185.6 CO2 g/km. (CO2 - Carbon dioxide emission) 

Yamaha ST 125 Electrical Systems, Ignition and Equipment

Ignition Type electronic 
Electrical Details
Starter Type Kick 
How much horsepower does a Yamaha ST 125 have?
The Yamaha ST 125 has 36.00 HP (26.3 kW).

How fast is a Yamaha ST 125?
The Yamaha ST 125 top speed is 160.0 km/h (99.4 mph).

How much does a Yamaha ST 125 weighs?
The Yamaha ST 125 weighs 110.0 kg (242.5 pounds).

How many gears does a Yamaha ST 125 have?
The Yamaha ST 125 have 6 gears.