At the heart of the 2006 KTM 640 LC4 Supermoto Black super motard motorcycle, KTM features a 625 cc (38.1 cu in) liquid-cooled single cylinder, four-stroke configuration. In factory specification, peak output is rated at 53.6 HP (39.2 kW) at 6,750 rpm while maximum torque reaches 60 Nm (44.3 lb-ft) at 5,750 rpm, transferring power to the rear wheel through a 5-speed gearbox and chain final drive. With a specific output of 85.8 HP per liter and a 1,000 rpm working window between peak torque (5,750 rpm) and peak power (6,750 rpm), the engine character is indicating a tractable, stress-free state of tune focused on everyday usability and broad torque delivery.
On the scales, the 640 LC4 Supermoto Black measures 149 kg (328 lbs) dry, translating to a power-to-weight ratio of 0.36 HP/kg (2.78 kg per horsepower). Rider ergonomics and chassis geometry center around a 910 mm (35.8 in) seat height — reflecting a long-travel chassis stance that favors ground clearance and off-pavement control, combined with a 1,510 mm (59.4 in) wheelbase engineered for balanced agility and highway composure.
Specific Output
85.8 HP/L
Power-to-Weight
0.36 HP/kg (2.78 kg/HP)
Power Band Window
5,750–6,750 rpm
Standover Height
910 mm (35.8 in)
Engine
Displacement625.0 ccm (38.14 cubic inches)
Engine TypeSingle cylinder, four-stroke
Engine DetailsSingle cylinder, four-stroke
Power53.6 HP (39.2 kW)) @ 6750 RPM
Torque60.0 Nm (6.1 kgf-m or 44.3 ft.lbs) @ 5750 RPM
Use this page to compare this motorcycle by its real specifications, not only by model name. Focus on the details that affect fit, comfort, handling, range and ownership.
Power
Compare engine output with similar motorcycles if acceleration, highway use or two-up riding matters.
Torque
Torque is useful for judging real-world pull, especially for touring, commuting and loaded riding.
Seat Height
Check the seat height against your inseam and riding posture before choosing a motorcycle.
Weight
Compare weight carefully because it affects low-speed handling, parking and confidence.
Brakes
Brake setup is worth comparing if you ride in traffic, mountains or with a passenger.
Suspension
Suspension details can matter for comfort, road feel and long-distance riding.
Transmission
Transmission and final drive affect maintenance, smoothness and everyday usability.
