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
General information | |
| Category | Sport |
| Year | 1998 |
| Model | Yamaha ST 125 |
| | |
Engine and Transmission Specifications | |
| Exhaust system | single expansion chamber and muffler |
| Greenhouse gases | 185.6 CO |
| Fuel consumption | 8.00 litres/100 km (12.5 km/l or 29.40 mpg) |
| Clutch | wet plate |
| Transmission type,final drive | Chain |
| Gearbox | 6-speed |
| Cooling system | Liquid |
| Lubrication system | oil injection |
| Ignition | electronic |
| Fuel control | Port control |
| Fuel system | Carburettor. mikuni |
| Max RPM | 11000 |
| Top speed | 160.0 km/h (99.4 mph) |
| Power | 36.00 |
| Engine type | Single cylinder, two-stroke |
| Capacity: | 125.00 ccm (7.63 cubic inches) |
Brakes, suspension, Frame and wheels | |
| Rear brakes | Single disc. twin piston caliper |
| Front brakes | Single disc. twin piston caliper |
| Rear suspension | monoshock |
| Front suspension | rwu forks |
| Frame type | steel deltabox |
Physical measures and capacities | |
| Fuel capacity | 10.00 litres (2.64 gallons) |
| Power/weight ratio | 0.3273 HP/kg |
| Dry weight | 110.0 kg (242.5 pounds) |
| | |
Other specs | |
| Maintenance | Find parts, fluids, filters, maintenance tools and service items on eBay |
| Color options | purple/ silver |
| Starter | Kick |
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 For | This is a high-strung two-stroke sportbike best suited to riders who already have experience managing a peaky powerband and close-ratio gearbox. |
| Purpose | Built as a lightweight, race-inspired sport machine for spirited riding on twisty roads rather than commuting comfort or long-distance touring. |
| Rider Fit | Its tiny 110 kg dry weight and compact sporty ergonomics suit smaller or fitness-conscious riders, with a low seat and aggressive forward-leaning stance. |
| Character | Eager, 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 For | This 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.
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