2005 KTM 450 SX
The MX 1 Racer for your own garage: the 450 SX is the basis for our successes in the king's class. It shines with its new frame, super-
agile chassis and linear performance progression. Top-quality equip-ment details - like machined triple-clamp, Brembo braking system with Wave discs or EXCEL rims - make one thing clear: the 450 SX leads the way to victory.
450 SX RACING
The use of new materials raises the temperature resistance of the
ignition and means greater stability at extreme temperatures. The new CDI box with optimized ignition timing provides increased
performance and at the same time more steering lock on account of the smaller dimensions.
The modified pressure cap ensures better oil supply and
consequently cooling of the clutch, greater durability and more
The strengthening of the crankshaft ensures better higher torsion resistance and reduces stress on the crankshaft bearings.
The modified, lighter piston results in a greater willingness to rev, less oscillating mass and therefore lower vibration.
Engine - single cylinder, 4-stroke
Displacement - 449.4 cc
Bore x stroke - 95 / 63,4 mm
Compression ratio - 12:1
Starter - kick starter
Transmission - 4 gears
Carburetor - Keihin MX FCR 41
Control - roller rocker lever
Lubrication - pressure lubrication with 2 Eaton pumps
Engine oil - 1,2 l Motorex Power Synt 4T 10W/50
Primary ratio - 33 : 76
Final drive - chain 5/8 x 1/4"
Cooling - liquid cooled
Clutch - wet multi-disc clutch, operated hydraulically
Ignition - Kokusan digital 4K-3A
Frame - chromium molybdenum
Subframe - aluminium
Handlebar - tapered Renthal Ø 28 mm
Front suspension - White Power-USD 48 mm
Rear suspension - White Power-PDS shock absorber
Suspension travel, front/rear - 300/335 mm
Front/rear brakes - disc brakes - 260/220 mm
Front/rear rims - 1,60 x 21"; 2,15 x 19" Excel
Front/rear tyres - 80/100-21"; 110/90-19"
Transmission - 14:52
Main silencer - aluminium
Steering head angle - 63,5°
Wheel caster - 112 mm
Wheelbase - 1481±10mm
Ground clearance (unloaded) - 380mm
Seat height - 925 mm
Fuel tank contents - 7 litres
Weight (without fuel) - approx. 105,2 kgs