KTM 450 SX-F - 2008 Specifications and Reviews

The 2008 KTM 450 SX-F is a high-performance four-stroke motocross bike designed for competitive riders and serious enthusiasts. Its potent single-cylinder engine and aggressive geometry deliver responsive handling and strong acceleration across varied terrain. Known for its winning reliability and race-proven performance, it remains a benchmark for serious off-road competitors.

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General information

CategoryEnduro / offroad
Year2008
ModelKTM 450 SX-F
 
 

Engine and Transmission Specifications

ClutchWet multi-disc clutch, operated hydraulically
Transmission typefinal driveChain
Gearbox4-speed
Cooling systemLiquid
Lubrication systemPressure lubrication
StarterKick
IgnitionKokusan digital DC-CDI
Fuel controlDOHC
Valves per cylinder4
Fuel systemCarburettor. Keihin MX FCR 41
Bore x stroke97.0 x 60.8 mm (3.8 x 2.4 inches)
Compression12.5:1
Stroke4
Engine typeSingle cylinder
Capacity:449.30 ccm (27.42 cubic inches)

Physical measures and capacities

Wheelbase1,475 mm (58.1 inches)
Ground clearance380 mm (15.0 inches)
Seat height960 mm (37.8 inches) If adjustable, lowest setting.
Dry weight104.6 kg (230.6 pounds)
 
 

KTM 450 SX-F dimensions and frame

Exhaust systemAluminium
Rear brakes diameter220 mm (8.7 inches)
Rear brakesSingle disc
Front brakes diameter260 mm (10.2 inches)
Front brakesSingle disc
Rear tyre dimensions110/90-19
Front tyre dimensions80/100-21
Rear suspension travel335 mm (13.2 inches)
Rear suspensionWP Monoshock PDS
Front suspension travel300 mm (11.8 inches)
Front suspensionWP USD
Rake (fork angle)26.5°
Frame typeCentral double-cradle-type 25 CrMo4

Speed and acceleration

Fuel capacity8.20 litres (2.17 gallons)

Other specs

MaintenanceFind parts, fluids, filters, maintenance tools and service items on eBay

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

2008 KTM 450 SX-F Rider Ergonomics Assessment

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Feet:

At 960mm, a rider of 175cm with a 79cm (estimated) inseam will reach the ground with cannot reach comfortably on the 2008 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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