22 June. Monday 2026
KTM 250 SX - 2021 Specifications and Reviews
The 2021 KTM 250 SX is a lightweight two-stroke motocross bike designed for intermediate to advanced riders seeking competitive performance. Known for its aggressive power delivery and nimble handling characteristics, it excels in tight track sections and technical terrain. The liquid-cooled 249cc engine and robust steel frame make it a reliable choice for both weekend racers and serious competitors.
General information | |
| Category | Cross / motocross |
| Year | 2021 |
| Model | KTM 250 SX |
Engine and Transmission Specifications | |
| Driveline | 13:48. Primary drive: 26:72. 520 X-ring chain. |
| Clutch | Wet, DDS multi-disc clutch, Brembo hydraulics |
| Transmission type | Chain (final drive) |
| Gearbox | 5-speed |
| Cooling system | Liquid |
| Ignition | Kokusan EMS. |
| Fuel system | Carburettor. Mikuni TMX. |
| Bore x Stroke | 66.4 x 72.0 mm (2.6 x 2.8 inches) |
| Engine details | Reed intake |
| Engine type | Single cylinder, two-stroke |
| Capacity: | 249.0 ccm (15.19 cubic inches) |
| | |
Brakes, suspension, Frame and wheels | |
| Wheels | CNC machined hubs. Excel rims. Wire spoked. Dunlop Geomax MX 3S tires. |
| Rear brakes | Single disc |
| Diameter | 260 mm (10.2 inches) |
| Front brakes | Single disc |
| Rear tire | 110/90-19 |
| Front tire | 80/100-21 |
| 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) | 26.5° |
| Frame type | Chrome-molybdenum steel central-tube |
| | |
Physical measures and capacities | |
| Fuel capacity | 7.50 litres (1.98 US gallons) |
| Wheelbase | 1495 mm (58.9 inches) |
| Ground clearance | 375 mm (14.8 inches) |
| Seat height | 850 mm (33.5 inches) If adjustable, lowest setting. |
| Dry weight | 87.5 kg (192.9 pounds) |
Other specs | |
| Starter | Kick |
| Color options | Orange/white/black |
Rider Reviews
Total comments: 1
MotorcycleDB Review
The 2021 KTM 250 SX is a powerful and agile motocross bike that delivers top-notch performance on the track. With its lightweight chassis and powerful 2-stroke engine, this bike offers impressive acceleration and handling. The updated suspension and frame design provide excellent stability and control, making it an ideal choice for riders looking to push their limits. Overall, the 2021 KTM 250 SX is a fantastic motocross bike that delivers on both power and precision. Its impressive performance and handling make it a top contender in the 250cc class. Whether you're a seasoned racer or a weekend warrior, this bike is sure to impress with its speed, agility, and durability. With its sleek design and top-notch performance, the 2021 KTM 250 SX is a standout choice for motocross enthusiasts.Add a Comment
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