At the heart of the 2012 KTM 450 SX atv motorcycle, KTM features a 510.4 cc (31.1 cu in) liquid-cooled single cylinder, four-stroke configuration. Internal engine geometry specifies a bore and stroke of 97.0 x 60.8 mm (3.8 x 2.4 inches) with a 11.0:1 compression ratio.
On the scales, the 450 SX measures 165 kg (364 lbs) dry. Rider ergonomics and chassis geometry center around a 795 mm (31.3 in) seat height — offering a neutral standover height that accommodates most average-inseam riders without sacrificing cornering clearance, combined with a 1,280 mm (50.4 in) wheelbase engineered for quick, flickable steering geometry. The 10.3-liter (2.7 US gal) fuel tank supports practical everyday commuting and weekend road stints.
Within MotoLibrary's KTM archive, this model family spans 3 indexed model years from 2006 to 2012, allowing buyers to track year-over-year changes in emissions tuning, weight and equipment.
Standover Height
795 mm (31.3 in)
Engine
Displacement510.4 ccm (31.14 cubic inches)
Engine TypeSingle cylinder, four-stroke
Engine DetailsCam levers, drive via helical gear pair and tooth-wheel chain
Compression11.0:1
Bore x Stroke97.0 x 60.8 mm (3.8 x 2.4 inches)
Valves/Cylinder4
Fuel SystemCarburettor. Keihin MX FCR 41
Fuel ControlSingle Overhead Cams (SOHC)
IgnitionKokusan digital 4K-3B
LubricationPressure lubrication with 2 Eaton pumps
Use this page to compare this motorcycle by its real specifications, not only by model name. Focus on the details that affect fit, comfort, handling, range and ownership.
Seat Height
Check the seat height against your inseam and riding posture before choosing a motorcycle.
Weight
Compare weight carefully because it affects low-speed handling, parking and confidence.
Fuel Capacity
Fuel capacity helps estimate touring range and how often you may need to stop.
Brakes
Brake setup is worth comparing if you ride in traffic, mountains or with a passenger.
Suspension
Suspension details can matter for comfort, road feel and long-distance riding.
Transmission
Transmission and final drive affect maintenance, smoothness and everyday usability.
