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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 equiped 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) . Regarding the chassis characteristics, responsible for road holding, handling behaviour and ride confort, the Yamaha ST 125 have a steel deltabox frame with front suspension being rwu forks and in the rear suspension it is equiped 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 rear. 

Yamaha ST 125 General Information

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

Yamaha ST 125 Dimensions, Aerodynamics and weight

Frame type steel deltabox 
Seat details  
Wheelbase  
Length  
Width  
Height  
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 
Driveline  

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) 
Emissions  

Yamaha ST 125 Electrical Systems, Ignition and Equipment

Ignition Type electronic 
Electrical Details  
Starter Type Kick 
Instruments  
Lights