KTM 450 SX Racing - 2005 Specifications and Reviews

The 2005 KTM 450 SX Racing is a high-performance motocross machine designed for competitive riders seeking reliability and aggressive power delivery. Its liquid-cooled 449cc single-cylinder engine delivers strong mid-range torque ideal for varied track conditions. Known for its lightweight construction and responsive handling, this bike excels in competitive cross and motocross racing environments.

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General information

CategoryCross / motocross
Year2005
ModelKTM 450 SX Racing

Engine and Transmission Specifications

ClutchWet multi-disc clutch, operated hydraulically
Transmission typefinal driveChain
Gearbox4-speed
Cooling systemLiquid
Lubrication systempressure lubrication with 2 Eaton pumps
StarterKick
IgnitionKokusan digital 4K-3A
Fuel systemCarburettor. Keihin MX FCR 41
Bore x stroke95.0 x 63.4 mm (3.7 x 2.5 inches)
Compression12.0:1
Stroke4
Engine typeSingle cylinder
Capacity:449.40 ccm (27.42 cubic inches)

Physical measures and capacities

Wheelbase1,481 mm (58.3 inches)
Ground clearance385 mm (15.2 inches)
Overall width450 mm (17.7 inches)
Seat height925 mm (36.4 inches) If adjustable, lowest setting.
Dry weight105.2 kg (231.9 pounds)
 
 

KTM 450 SX Racing dimensions and frame

Rear brakes diameter260 mm (10.2 inches)
Rear brakesSingle disc
Front brakes diameter216 mm (8.5 inches)
Front brakesSingle disc
Rear suspension travel335 mm (13.2 inches)
Rear suspensionWP-PDS shock absorber
Front suspensionWP-USD 48 mm (1.89 inch)
Trail112 mm (4.4 inches)
Rake (fork angle)26.5°
Frame typeChromium molybdenum
 
 

Speed and acceleration

Fuel capacity7.00 litres (1.85 gallons)

Other specs

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

Performance Profile & Rider Fit

Best For

Track60%
City10%
Cornering85%
Daily Riding10%
Touring8%
Passenger5%

Rider Profile

Best ForThis is a full-blooded, race-ready motocross machine intended for experienced off-road and moto riders, not beginners.
PurposeBuilt purely for motocross competition and aggressive off-road riding, not for street use or commuting.
Rider FitThe tall 925mm seat height, minimal weight, and kick-start-only setup demand a fit, confident rider comfortable throwing their body weight around on rough terrain.
CharacterLight, razor-sharp, and explosive, this bike rewards aggressive inputs with incredible agility and jump-to-jump responsiveness on the track.
Not Ideal ForThis is not suited for daily commuting, long-distance touring, passengers, or riders seeking a comfortable, low-maintenance street bike.

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

Rider Fit Visualizer

2005 KTM 450 SX Racing Rider Ergonomics Assessment

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

Feet:

At 925mm, a rider of 175cm with a 79cm (estimated) inseam will reach the ground with cannot reach comfortably on the 2005 KTM 450 SX Racing, with a cramped knee angle of around 80 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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