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2005 KTM 450 SX

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

IGNITION

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.

CLUTCH

The modified pressure cap ensures better oil supply and consequently cooling of the clutch, greater durability and more precise appliction.

CRANKSHAFT

The strengthening of the crankshaft ensures better higher torsion resistance and reduces stress on the crankshaft bearings.

PISTON

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 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 - 148110mm
  • Ground clearance (unloaded) - 380mm
  • Seat height - 925 mm
  • Fuel tank contents - 7 litres
  • Weight (without fuel) - approx. 105,2 kgs