Supermotos

2003KTM 640 LC4 Supermoto

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The 2003 KTM 640 LC4 Supermoto is a lightweight, nimble supermoto designed for riders seeking playful urban agility and off-road versatility. Powered by a torquey 625cc single-cylinder four-stroke engine producing 55 Nm, it excels at quick city navigation and tight technical riding. Known for its responsive handling and genuine dirt bike heritage, it appeals to experienced riders wanting genuine fun over pure performance.

Capacity: 625.0 ccm
Engine: Single single, four-stroke
Gearbox: 5-speed
Dry weight: 149.0 kg
Seat height: 910 mm
Power: 54.8 HP

⇄ Compare with another bike All model years

Other years 2003 2004 2005 2006 2007

How it rides

Editorial estimate from the spec sheet - not lab tested

Off-road & trail55%

Cornering93%

City riding78%

Daily riding50%

Touring28%

Two-up20%

Track70%

Best for: Built for sharp, flickable cornering fun on twisty tarmac and supermoto-style thrills rather than covering long distances.
Built for: A raw, mechanical, big-single supermoto that rewards aggressive, engaged riding with immediate steering response and strong midrange torque.
Not ideal for: Not a good fit for riders wanting plush comfort, pillion practicality, or effortless long-haul touring capability.

Scores are derived from the spec sheet using the same model across every bike, so they compare like for like.

Will it fit you?

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Your height

Inseam (optional)

Units

At 910mm, a rider of 175cm with a 79cm (estimated) inseam will not reach the ground comfortably on the 2003 KTM 640 LC4 Supermoto, with a relaxed knee angle of around 150 degrees and a forward-leaning riding position.

Assumes about 30mm of suspension sag once seated. This is an approximation from category-typical geometry, not a measurement of this bike or of you - sit on one before you buy.

More bikes at over 900 mm — Sky High →

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Full specifications

Engine

Capacity: 625.0 ccm
Power: 54.8 HP
Torque: 55.0 Nm (5.6 kgf-m) @ 5500 RPM
Engine type: Single single, four-stroke
Power/weight ratio: 0.3678 HP/kg
Bore x stroke: 102.0 x 80.0 mm
Compression: 11.5:1
Cooling system: Liquid
Fuel system: Carburettor
Starting: Electric & kick
Valves per cylinder: 4

Transmission

Gearbox: 5-speed
Transmission type: Manual
Final drive: Chain
Clutch: Wet multi-disc clutch, operated hydraulically

Dimensions & weight

Wheelbase: 1510 mm
Seat height: 910 mm
Dry weight: 149.0 kg
Fuel capacity: 12.00 litres
Ground clearance: 290 mm
Reserve fuel capacity: 2.50 litres

Chassis & suspension

Front suspension: WP-USD 48 MA
Rear suspension: WP - Monoshock
Front wheel travel: 265 mm
Rear wheel travel: 310 mm

Brakes & wheels

Front brakes: Single disc
Front brakes diameter: 320 mm
Rear brakes: Single disc
Rear brakes diameter: 220 mm
Front tyre: 120/70-17
Rear tyre: 160/60-17

Compiled from manufacturer documentation and user contributions, corrected on an ongoing basis. Spotted something wrong? Tell us.

What changed, year to year

Differences highlighted

Specification	2003	2004	2005	2006	2007
Capacity	625.00 ccm (38.14 cubic inches)	625.00 ccm (38.14 cubic inches)	625.00 ccm (38.14 cubic inches)	625.00 ccm (38.14 cubic inches)	625.00 ccm (38.14 cubic inches)
Dry weight	149.0 kg (328.5 pounds)	149.0 kg (328.5 pounds)	149.0 kg (328.5 pounds)	149.0 kg (328.5 pounds)	149.0 kg (328.5 pounds)
Seat height	910 mm (35.8 inches)	910 mm (35.8 inches)	910 mm (35.8 inches)	910 mm (35.8 inches)	910 mm (35.8 inches)
Fuel capacity	12.00 litres (3.17 gallons)	12.00 litres (3.17 gallons)	12.00 litres (3.17 gallons)	12.00 litres (3.17 gallons)	9.20 litres (2.43 gallons)