2004 KTM 640 Duke II
 
New side stand has new forged bracket, new
retracting spring.
Secondary transmission 17:42.
New colours.
Engine - single-cylinder 4-stroke engine
Displacement (cc) - 625
Bore / stroke (mm) - 101 / 78
Performance (homologated) - 40 kW / 7000
rpm
Max. torque - 60 Nm / 5500 rpm
Compression ratio - 11.7:1
Starter - E-starter and kickstarter
Transmission - 5 gears, dog-clutch engagement
Carburetor - Mikuni BST 40
Control - 4 valves / OHC, roller rocker
lever
Lubrication - Pressure lubrication with
2 Eaton pumps
Engine oil - Motorex Power Synt 4T 10W-50
Primary drive - 31:79
Cooling - liquid-cooled
Clutch - wet multi-disc clutch, operated
hydraulically
Ignition - Kokusan DC-CDI 4K5
Frame - chromium-molybdenum, power-coated
Subframe - chromium-molybdenum, power-coated
Handlebar - aluminum, conified
Front suspension - WP-USD 43 MA
Rear suspension - WP - Monoshock
Suspension travel, front/rear - 140 / 170
mm
Front brake - Brembo 4-piston floating
caliper, 320 mm disc
Rear brake - Brembo 1-piston floating caliper,
220 mm disc
Rims, front/rear - 3.5 x 17" / 4.5 x 17"
Tyres, front/rear - 120/70-17" ; 160/70-17"
Transmission ratio - 17:42
Chain - X-ring chain 5/8 x 1/4 "
Battery - 12V 8Ah
Main silencer - 2 x aluminum
Steering head angle - 63.5°
Wheel caster - 109 mm
Wheelbase - 1460±10mm
Ground clearance (unloaded) - 270 mm
Seat height - 900 mm
Fuel capacity - approx. 12 liters / 2.5
liters reserve
Weight (no fuel) - approx. 149 kg
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