KTM 125 SX - 2024 Specifications and Reviews
The 2024 KTM 125 SX is a lightweight two-stroke enduro bike designed for young riders and beginners entering competitive off-road racing. Known for its nimble handling, responsive 15 HP engine, and proven reliability, it excels in technical terrain and serves as an ideal stepping stone in motocross progression. Its liquid-cooled single-cylinder design and modern fuel injection deliver consistent performance across varied conditions.
General information | |
| Category | Enduro / offroad |
| Model year | 2024 |
| Motorcycle name | KTM 125 SX |
Engine and Transmission Specifications | |
| Driveline | 520, Non-sealed chain |
| Clutch | Wet multi-disc DS clutch, Brembo hydraulics |
| Transmission type | Chain (final drive) |
| Gearbox | 6-speed |
| Cooling system | Liquid |
| Lubrication system | Wet sump |
| Ignition | Vitesco Technologies EMS |
| Fuel system | Injection. EFI |
| Bore x stroke | 54.0 x 54.5 mm (2.1 x 2.1 inches) |
| Power output | 15.0 HP (10.9 kW)) |
| Engine type | Single cylinder, two-stroke |
| Capacity: | 124.8 ccm (7.62 cubic inches) |
Brakes, suspension, Frame and wheels | |
| Rear brakes | Single disc |
| Diameter | 260 mm (10.2 inches) |
| Front brakes | Single disc |
| Rear tire | 2.15-19 |
| Front tire | 1.6-21 |
| Rear wheel travel | 300 mm (11.8 inches) |
| Rear suspension | WP XACT Monoshock with linkage |
| Front wheel travel | 310 mm (12.2 inches) |
| Front suspension | WP XACT-USD, Ø 48 mm |
| Rake (fork angle) | 26.1° |
| Frame type | Central double-cradle-type 25CrMo4 steel |
| | |
Physical measures and capacities | |
| Fuel capacity | 7.20 litres (1.90 US gallons) |
| Ground clearance | 359 mm (14.1 inches) |
| Seat height | 958 mm (37.7 inches) If adjustable, lowest setting. |
| Power/weight ratio | 0.1623 HP/kg |
| Dry weight | 92.4 kg (203.7 pounds) |
Other specs | |
| Maintenance | Find parts, fluids, filters, maintenance tools and service items on eBay |
| Starter | Electric |
| Color options | White/orange/grey/purple |
Performance Profile & Rider Fit
Best For
Track95%
City10%
Cornering90%
Daily Riding10%
Touring8%
Passenger5%
Rider Profile
| Best For | This is a full-on motocross competition bike best suited to intermediate through expert off-road riders, not beginners or casual road riders. |
| Purpose | Built purely for closed-course motocross racing, it excels at jumps, berms, and rapid direction changes on dirt tracks rather than any street use. |
| Rider Fit | The tall 958 mm seat height, aggressive ergonomics, and demanding 2-stroke power delivery require good rider fitness, strength, and prior dirt bike experience. |
| Character | Light, explosive, and razor-sharp in handling, it rewards aggressive riding with a peaky two-stroke power band and minimal weight to manage. |
| Not Ideal For | It is not suitable for commuting, highway travel, passengers, or riders seeking comfort, storage, or a forgiving low-end power delivery. |
Character map is an editorial estimate based on this bike's specifications, not a lab-tested measurement.
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