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2004 KTM 450 SX

KTM 450 SX

A highly manageable chassis of a 250 combined with the predominant performance pattern of the new 450 4-stroke engine, ready for riding with less than 105 kg. With the 450 SX Racing a custom-made competition crosser was made for its class.

New valve springs and valve spring caps reduce cylinder head oscillating mass and result in a quicker revving engine.

  • Engine - single cylinder, 4-stroke
  • Displacement (cc) - 449.39
  • Bore x stroke (mm) - 95 x 63.4
  • Compression ratio - 12:1
  • Starter - kick-starter
  • Transmission - 4 gears
  • Carburetor - Keihin MX FCR 41
  • Control - 4 V / OHC with roller rocker lever
  • Lubrication - pressure lubrication with 2 Eaton pumps
  • Engine oil - 1,2 l Motorex Power Synt 4T 10W/50
  • Primary drive - 33 : 76
  • 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 - WP-USD 48/26 MA/PA
  • Rear suspension - WP-PDS-DA 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
  • Chain - X-ring chain 5/8 x 1/4"
  • Main silencer - aluminum
  • Steering head angle - 63.5
  • Wheel caster - 112 mm
  • Wheelbase - 148110 mm
  • Ground clearance (unloaded) - 380 mm
  • Seat height - 925 mm
  • Fuel capacity - approx. 7 litres
  • Weight (ready to race, no fuel) - approx. 104.9 kgs