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– 2012 KTM 450SX-F
2012 KTM 450SX-F Review
Packed with power
When it comes to pure power, there is still nothing to replace displacement. The only problem is applying the power to the ground. The high-quality chassis on the 450 SX-F allows advanced riders to convert the brutal power of the innovative DOHC four-stroke engine into controllable traction, even on the toughest MX tracks. With an even more robust clutch, the 450 SX-F is still a real ace in the motocross/450 class.
New for 2012 the 450 SX-F model is now equipped with Dunlop MX51 tires.
2012 KTM 450SX-F Features and Benefits
The sensational, state-of-the-art four-stroke single-cylinder engine in the 450 SX-F, featuring twin overhead camshafts and four valves actuated by means of cam levers, excels with an extremely wide usable rev range and immense torque coupled with unrivalled performance.
Exhaust manifold with HPRS
In conjunction with the innovative HPRS (Header Pipe Resonator System) and large-diameter silencer, the super-light titanium exhaust header on the 450 SX-F ensures plenty of power at low noise levels.
The state-of-the-art frame on the 450 SX-F made from high-quality chrome-molybdenum steel is extremely light and torsion-resistant. It is also characterized by a particularly balanced geometry that combines easy handling with razor-sharp precision.
The further improved upside-down telescopic fork incorporating closed-cartridge technology now ensures even greater punch with a somewhat tauter setting. At the same time, the WP fork with 48 mm (1.89 in) outer tube diameter boosts the perfect handling of the 450 SX-F.
Clutch with spring washer
The newly developed clutch on the 450 SX-F, with a robust steel cage and transmission-friendly back-damping, makes use of a spring washer for the first time instead of the customary conical springs, substantially reducing the operating force. The hydraulic mechanism allows sensitive operation of the clutch.
Years ago, KTM proved that an electric starter is very advantageous even in the tough sport of motocross. That’s why the 450 SX-F can also be started at the press of a button.
The bodywork of the 450 SX-F with the very slim seat and radiator shrouds, plus excellent contact points perfect the bike’s ergonomics, making handling even simpler and more precise.
2012 KTM 450SX-F – International Specifications/Technical Details
MSRP Price: See KTM dealer in your country for pricing.
Engine type Single cylinder, 4-stroke
Displacement 449.3 ccm
Bore/stroke 97/60.8 mm
Compression ratio 12.5:1
Starter/battery Electric starter / 12V 3Ah
Transmission 5 gears
Carburetor Keihin FCR-MX 41
Control 4 V / DOHC with finger followers
Lubrication Pressure lubrication with 3 oil pumps
Gear ratios 16:34 19:31 20:26 23:25 26:24 –
Primary ratio 29:74
Final drive 14:52
Cooling Liquid cooling
Clutch Wet multi-disc clutch, Magura hydraulics
Frame Central double-cradle-type 25CrMo4
Handlebar Renthal, Aluminium Ã˜ 28/22 mm
Front suspension WP-USD, Closed Cartridge, Ã˜ 48 mm
Rear suspension WP-Monoshock with linkage
Suspension travel front/rear 300/330 mm
Front/rear brakes Disc brake 260/220 mm
Front/rear rims 1.60 x 21″; 2.15 x 19″ Excel
Front/rear tires 80/100-21″; 110/90-19″
Chain 5/8 x 1/4″
Steering head angle 63.5°
Wheel base 1,495 ± 10 mm
Ground clearance 371 mm
Seat height 992 mm
Tank capacity, approx. 7.5 l
Weight, without fuel, approx. 106.9 kg