KTM 450 SX-F - 2019 Specifications and Reviews

The 2019 KTM 450 SX-F is a high-performance four-stroke motocross bike engineered for competitive and experienced off-road riders. Known for its lightweight construction at just 100kg and potent engine delivery, it excels in both MX racing and aggressive trail riding. The bike features advanced WP suspension, precision braking, and electric start technology for reliable performance at the highest levels.

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General information

CategoryCross / motocross
Year2019
ModelKTM 450 SX-F
 
 

Engine and Transmission Specifications

Driveline5/8 x 1/4
ClutchWet, DDS multi-disc clutch, Brembo hydraulics
Transmission typeChain   (final drive)
Gearbox4-speed
Cooling systemLiquid
IgnitionKeihin EMS
Fuel controlSingle Overhead Cams (SOHC)
Fuel systemInjection
Bore x Stroke95.0 x 63.4 mm (3.7 x 2.5 inches)
Engine typeSingle cylinder, four-stroke
Capacity:449.3 ccm (27.42 cubic inches)

Brakes, suspension, Frame and wheels

WheelsCNC machined hubs. Excel rims. Wire spoked.
Rear brakesSingle disc. Brake calipers on floating bearings
Diameter260 mm (10.2 inches)
Front brakesSingle disc. Brake calipers on floating bearings
Rear wheel travel310 mm (12.2 inches)
Rear SuspensionWP shock absorber with linkage
Front wheel travel300 mm (11.8 inches)
Front SuspensionWP-USD, AER 48, Ø 48 mm
Rake (fork angle)26.5°
Frame type25CrMo4 steel central-tube frame
 
 

Physical measures and capacities

Fuel capacity7.00 litres (1.85 US gallons)
Wheelbase1485 mm (58.5 inches)
Ground clearance370 mm (14.6 inches)
Seat height960 mm (37.8 inches) If adjustable, lowest setting.
Dry weight100.0 kg (220.5 pounds)

Other specs

MaintenanceFind parts, fluids, filters, maintenance tools and service items on eBay
ElectricalLightweight 495 g lithium-ion starter battery
StarterElectric
Color optionsOrange/white/black

Performance Profile & Rider Fit

Best For

Track92%
City10%
Cornering90%
Daily Riding15%
Touring10%
Passenger5%

Rider Profile

Best ForThis is a purebred motocross machine best suited to experienced off-road or competitive riders, not beginners.
PurposeBuilt for motocross racing and aggressive off-road riding on tracks and rough terrain.
Rider FitThe tall 958 mm seat height, high ground clearance, and firm suspension demand strong rider fitness and confident bike control.
CharacterA light, explosive, high-revving single-cylinder racer that rewards aggressive input with razor-sharp agility and jump-ready suspension.
Not Ideal ForThis bike is not suited to riders wanting a comfortable commuter, long-distance tourer, or a passenger-friendly ride.

Character map is an editorial estimate based on this bike's specifications, not a lab-tested measurement.

Rider Fit Visualizer

2019 KTM 450 SX-F Rider Ergonomics Assessment

Calculated in your browser only - your height/inseam are never sent to our servers.

Feet:

At 960mm, a rider of 175cm with a 79cm (estimated) inseam will reach the ground with cannot reach comfortably on the 2019 KTM 450 SX-F, with a cramped knee angle of around 85 degrees and an upright riding position.

Data quality: measured. Assumes about 30mm of suspension sag once seated (a typical street-bike rule of thumb - stiffer or softer suspension will vary). This is an approximation from category-typical geometry and generic body proportions, not a measurement of this specific bike or you - sit on it before you buy.

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Rider Reviews

Total comments: 1
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MotorcycleDB Review

The 2019 KTM 450 SX-F is a top-of-the-line motocross bike that delivers incredible power and performance. With its 450cc engine, this bike is designed for serious off-road enthusiasts who demand the best. The lightweight frame and advanced suspension system make for a smooth and controlled ride, while the ergonomic design and comfortable seat ensure that riders can stay comfortable during long races or off-road adventures. Overall, the 2019 KTM 450 SX-F is a top choice for riders who want a high-performance bike that can handle the toughest terrain. The 2019 KTM 450 SX-F is a force to be reckoned with on the motocross track. Its powerful engine and advanced suspension system make for a smooth and controlled ride, while the lightweight frame and ergonomic design ensure that riders can push the limits without feeling fatigued. With its top-of-the-line performance and reliable construction, the 2019 KTM 450 SX-F is a top choice for serious off-roaders who demand the best.
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