the very successful start to the 2006 Motocross World
Championships, KTM announced an entirely new generation of
off-road machines. The spearhead of the new range is the 450 SX-F.
KTM has chosen to present the 450 SX-F, the first model of this
new generation of off-road motorcycles, at the Spanish Motocross
Grand Prix in Bellpuig.
Left side of the engine.
Right side of engine.
Standing tall, the all-new 450F sports an electric start.
For 2007, the KTM 450 weighs in at a mere 226 pounds.
The new 450
SX-F is driven by a completely re-developed 4-stroke single
cylinder engine with 449 ccm displacement and twin overhead
camshafts. Four super-lightweight titanium valves and a DLC-
coated rocker arm work together with the compact cylinder head of
the engine with high revving abilities. For the first time, the
bike comes with an electric starter to set the 59hp power unit
with its Keihin carburetor in motion. The application of this new
technology means a significant time saving at the start and also
carves valuable seconds off a rider's times during the races.
A totally new chassis has been developed to help the performance
of the 450 SX-F engine into a positive and effective tool on the
racing circuit. The frame, made from generously dimensioned, oval
tubular profile, is particularly innovative, because it allows for
slightly more space for the cooling system. Improved rigidity
means that the weight of the new frame can be further reduced.
weight-optimized, light cast metal rocker, new geometric data from
the latest PDS absorber system as well as a totally new WP
Suspension upside down fork with integrated cartridge absorber
system, transforms the SX chassis.
When it comes to all the plastic components for the new SX
generation, the KTM development engineers have paid special
attention to ergonomics and maximum ease of use. The 450 SX-F is
the first model of the new generation that features a fresh design
for the tank section that now has a distinctively larger contact
surface. In order to achieve the best possible feeling with the
rider in every situation, the seat has also been totally
overhauled. The new SX, with its numerous modifications, also has
a new and very aggressive appearance.
TESTING IN COMPETITION
The new 450 SX-F was raced by MX1-factory rider, Jonathan Barragan,
who has been playing an important role in the development process.
He demonstrated the immense potential of the new bike in Bellpuig.
He was an excellent 4th , just behind World Champion Stefan
Everts in the first race, as well as scoring 7th in the second at
the Spanish Grand Prix last weekend.
the new lines of KTM 125 SX, 250 SX and the 250 SX-F machines, the
450 SX-F will be officially presented to the international media
in Mattighofen at the end of June. Delivery of the entire latest
generation of KTM SX will follow immediately after.
DATA FOR THE FACTORY KTM 450 SX-F
Engine Type: Single cylinder, 4-stroke
Displacement (cc): 449.3
Bore x Stroke (mm): 97 / 60.8
Compression ratio: 12,5 : 1
Performance: approx. 59 HP
Starter: electric starter
Transmission: 4 gears
Carburetor: Keihin MX FCR 41
Control: 4V / DOHC with finger levers
Primary ratio: 29 : 74
Final drive: 5/8 x 1/4"
Cooling: Liquid cooled
Clutch: Wet multi-disc clutch, operated hydraulically
Ignition: Kokusan digital CDI
Frame: Chromium molybdenum
Front suspension: WP-USD 52 MA
Rear suspension: WP-PDS shock absorber
Suspension travel front/rear: 300 / 335 mm
Front brakes: Disc brake 260 mm
Rear brakes: Disc brake 220 mm
Front/rear rims: 1.6 x 21" / 2.15 x 19"
Front/rear tyres: 80/100-21" / 110/90-19"
Transmission ratio: 14:50
Main silencer: Titanium
Steering head angle: 63.5°
Wheel caster: 112 mm
Wheelbase: 1481±10 mm
Ground clearance (unloaded): 380mm
Seat height (unloaded): 925mm
Fuel capacity: approx. 7 liters
Weight: approx. 100 kg