2004 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 Ø 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 - 1481±10 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
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