KTM 450 SX-F - 2021 Specifications and Reviews
The 2021 KTM 450 SX-F is a competitive four-stroke motocross bike designed for experienced riders seeking reliable performance in professional and amateur racing environments. Known for its potent 63 horsepower single-cylinder engine and precise Brembo hydraulic braking, it delivers strong acceleration and excellent handling on both tracks and natural terrain. This machine excels in high-speed racing applications where power delivery and durability are paramount.
General information | |
| Category | Cross / motocross |
| Year | 2021 |
| Model | KTM 450 SX-F |
Engine and Transmission Specifications | |
| Driveline | 5/8 x 1/4 |
| Clutch | Wet, DDS multi-disc clutch, Brembo hydraulics |
| Transmission type | Chain (final drive) |
| Gearbox | 4-speed |
| Cooling system | Liquid |
| Ignition | Keihin EMS |
| Fuel control | Single Overhead Cams (SOHC) |
| Fuel system | Injection |
| Bore x Stroke | 95.0 x 63.4 mm (3.7 x 2.5 inches) |
| Power | 63.0 Horsepower">HP (46.0 Kilowatt">kW)) |
| Engine type | Single cylinder, four-stroke |
| Capacity: | 449.3 ccm (27.42 cubic inches) |
| | |
Brakes, suspension, Frame and wheels | |
| Wheels | CNC machined hubs. Excel rims. Wire spoked. |
| Rear brakes | Single disc. Brake calipers on floating bearings |
| Diameter | 260 mm (10.2 inches) |
| Front brakes | Single disc. Brake calipers on floating bearings |
| 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 | 25CrMo4 steel central-tube |
| | |
Physical measures and capacities | |
| Fuel capacity | 7.00 litres (1.85 US gallons) |
| Wheelbase | 1485 mm (58.5 inches) |
| Ground clearance | 370 mm (14.6 inches) |
| Seat height | 950 mm (37.4 inches) If adjustable, lowest setting. |
| Power/weight ratio | 0.6300 HP/kg |
| Dry weight | 100.0 kg (220.5 pounds) |
Other specs | |
| Electrical | Lightweight 495 g lithium-ion starter battery |
| Starter | Electric |
| Color options | Orange/white/black |
Rider Reviews
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