Positioned in KTM's enduro - offroad motorcycle lineup, the 2006 KTM 640 Adventure utilizes a 625 cc (38.1 cu in) liquid-cooled single cylinder, four-stroke layout. In factory specification, peak output is rated at 53.6 HP (39.2 kW) at 7,000 rpm while maximum torque reaches 55 Nm (40.6 lb-ft) at 5,500 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 1,500 rpm working window between peak torque (5,500 rpm) and peak power (7,000 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 Adventure measures 158 kg (348 lbs) dry, translating to a power-to-weight ratio of 0.34 HP/kg (2.95 kg per horsepower). Rider ergonomics and chassis geometry center around a 945 mm (37.2 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. The 25.5-liter (6.7 US gal) fuel tank supports practical everyday commuting and weekend road stints.
Within MotoLibrary's KTM archive, this model family spans 2 indexed model years from 2006 to 2007, allowing buyers to track year-over-year changes in emissions tuning, weight and equipment.
Specific Output
85.8 HP/L
Power-to-Weight
0.34 HP/kg (2.95 kg/HP)
Power Band Window
5,500–7,000 rpm
Standover Height
945 mm (37.2 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)) @ 7000 RPM
Torque55.0 Nm (5.6 kgf-m or 40.6 ft.lbs) @ 5500 RPM
Compression11.7:1
Bore x Stroke101.0 x 78.0 mm (4.0 x 3.1 inches)
Valves/Cylinder4
Fuel SystemCarburettor. Mikuni BST 40
Fuel ControlOverhead Cams (OHC)
IgnitionKokusan DC-CDI
LubricationPressure lubrication with 2 Eaton pumps
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.
Fuel Capacity
Fuel capacity helps estimate touring range and how often you may need to stop.
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.
