Yamaha ST 125 - 1998 Specifications and Reviews

The 1998 Yamaha ST 125 is a lightweight sport bike designed for new and young riders seeking an affordable entry into performance motorcycling. Powered by a spirited 125cc two-stroke single cylinder engine producing 36 horsepower, it delivers exciting acceleration and a top speed of 160 km/h. Known for its nimble handling and competitive spirit in the learner bike category, the ST 125 excels as a practical commuter with genuine sporting credentials.

1998
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General information

CategorySport
Year1998
ModelYamaha ST 125
 
 

Engine and Transmission Specifications

Exhaust systemsingle expansion chamber and muffler
Greenhouse gases185.6 CO
Fuel consumption8.00 litres/100 km (12.5 km/l or 29.40 mpg)
Clutchwet plate
Transmission type,final driveChain
Gearbox6-speed
Cooling systemLiquid
Lubrication systemoil injection
Ignitionelectronic
Fuel controlPort control
Fuel systemCarburettor. mikuni
Max RPM11000
Top speed160.0 km/h (99.4 mph)
Power36.00
Engine typeSingle cylinder, two-stroke
Capacity:125.00 ccm (7.63 cubic inches)

Brakes, suspension, Frame and wheels

Rear brakesSingle disc. twin piston caliper
Front brakesSingle disc. twin piston caliper
Rear suspensionmonoshock
Front suspensionrwu forks
Frame typesteel deltabox

Physical measures and capacities

Fuel capacity10.00 litres (2.64 gallons)
Power/weight ratio0.3273 HP/kg
Dry weight110.0 kg (242.5 pounds)
 
 

Other specs

MaintenanceFind parts, fluids, filters, maintenance tools and service items on eBay
Color optionspurple/ silver
StarterKick

Performance Profile & Rider Fit

36 hp
Peak Power
5.8s
0-60 mph
99.4 mph
Top Speed

Best For

Track75%
City65%
Cornering90%
Daily Riding40%
Touring20%
Passenger15%

Rider Profile

Best ForThis is a high-strung two-stroke sportbike best suited to riders who already have experience managing a peaky powerband and close-ratio gearbox.
PurposeBuilt as a lightweight, race-inspired sport machine for spirited riding on twisty roads rather than commuting comfort or long-distance touring.
Rider FitIts tiny 110 kg dry weight and compact sporty ergonomics suit smaller or fitness-conscious riders, with a low seat and aggressive forward-leaning stance.
CharacterEager, buzzy, and demanding, this bike rewards riders who like to keep the engine spinning near its 11,000 rpm redline to extract its performance.
Not Ideal ForThis is not the right bike for riders wanting relaxed touring comfort, passenger carrying, or off-road capability.

Character map is an editorial estimate based on this bike's specifications, not a lab-tested measurement.

Rider Reviews

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