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2020 KTM 450 SX-F

Chaparral Motorsports
|
April 30, 2019

The championship winning KTM 450 SX-F utilizes a proven formula of performance and handling that is the industry benchmark. For 2020, this machine continues to deliver superior performance and easy handling. It features an extremely compact, single overhead camshaft cylinder head and together with the efficient electronic fuel injection, it pushes out unrivalled power in the most effective way possible. The KTM 450 SX-F is simply the fastest Motocross bike out on the track.

2020 KTM 450 SX-F Highlights

[caption id="attachment_72728" align="aligncenter" width="300"] 2020 KTM 450 SX-F[/caption]


  • NEW graphics for a READY TO RACE appearance.
  • NEW WP XACT front fork setting for improved damping, and new fork piston for improved performance. Features proven, sophisticated air spring design with separate damping functions.
  • NEW WP XACT rear shock setting and new compression adjuster for improved tuning.
  • NEW piston with reworked shape for improved performance and reliability.


  • NEW larger 49t rear sprocket for better response.


  • Compact SOHC (single overhead camshaft) engine with cutting-edge cylinder head featuring titanium valves and super-light finger followers with a hard DLC coating.
  • High-tech, lightweight chrome-moly steel frame with optimized stiffness provides a great blend of comfort and stability.
  • Single-piece cast aluminum swingarm features a long rear axle slot for increased adjustability, offering better straight-line stability.
  • Bodywork features a slim design for optimal comfort, control and freedom of movement.
  • Air box and air boot designed to provide maximum protection of the air filter against soiling and better airflow for optimal performance. Air filter can be accessed without tools for quick servicing. Optional perforated airbox cover included in the by-pack.


  • Header pipe with FDH (Flow Design Header) resonator system for improved performance.


  • Handlebar map switch selects between two maps and activates traction and launch control for better traction and more efficient starts.
  • Hydraulic Brembo clutch system offers light operation and highly controllable modulation of the clutch.
  • High-tech Brembo brakes have always been standard equipment on KTM offroad bikes and are combined with lightweight Wave discs.
  • Handlebar clamps feature a separated lower clamp and bridge-type upper clamp for more torsional stiffness.
  • KTM's "No Dirt" foot peg design keeps the peg pivot from becoming clogged, ensuring the foot peg is always in the correct position.
  • Super lightweight Galfer Wave rotors, CNC machined hubs, high-end Excel rims and Dunlop MX 3S tires.
  • "No Dirt" shift lever prevents dirt from fouling the lever joint to ensure proper shifting in any condition. 

SPECIFICATIONS

Engine Type: Single Cylinder, 4-Stroke

Displacement: 449.9c c

Bore / Stroke: 95 / 63.4 mm

Compression Ratio: 12.75:1

Starter/Battery: Electric Starter / 12.8V, 2 Ah

Transmission: 5 Gears

Fuel System: Keihin EFI, 44 mm Throttle Body

Lubrication: Pressure lubrication with 2 oil pumps

Primary Ratio: 31:76

Final Drive: 13:49

Cooling: Liquid Cooling

Clutch: Wet Multi-Disc DDS-Clutch, Brembo Hydraulics

Ignition: Keihin EMS

Frame: Central Double-Cradle Type 25CrMo4 Steel

Sub Frame: Aluminum

Handle bar: Neken, Aluminum Ø 28/22 mm

Front Suspension: WP XACT USD Fork, Ø 48 mm

Rear Suspension: WP XACT Monoshock with Linkage

Suspension Travel Front/Rear: 310 mm / 12.2 in; 300 mm / 11.81 in

Front/Rear Brakes: Disc Brake 260 mm / 10.24 in; 220 mm / 8.66 in

Front/Rear Rims: 1.60x 21" / 2.15 x 19" Excel

Front/Rear Tires: 80/100-21" / 120/80-19" Dunlop MX 3S

Chain: 5/8 x 1/4 in

Silencer: Aluminum

Steering Head Angle: 26.1º

Triple Clamp Offset: 22 mm

Wheelbase: 1,485 mm ± 10 mm / 58.5 ± 0.4 in

Ground Clearance: 370 mm / 14.6 in

Seat Height: 950 mm / 37.4 in

Tank Capacity, Approx: 7 L / 1.85 gal

Weight (without fuel), Approx: 100.5 kg / 221.5 lbs

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