KTM Duke II 640 - Specifications & Review

Duke II 640

Article Complete Info

Articleid225781
CategorySuper motard
MakeKTM
ModelDuke II 640
Year2001

Chassis, Suspension, Brakes & Wheels

FrontbrakesSingle disc
Frontbrakesdiameter320 mm (12.6 inches)
Fronttyre120/70-HR17
Frontwheeltravel140 mm (5.5 inches)
RearbrakesSingle disc
Rearbrakesdiameter220 mm (8.7 inches)
Reartyre160/60-HR17
Rearwheeltravel170 mm (6.7 inches)

Engine & Transmission

Borexstroke101.0 x 78.0 mm (4.0 x 3.1 inches)
Displacement625.00 ccm (38.14 cubic inches)
EnginedetailsSingle cylinder, four-stroke
FuelsystemCarburettor
Gearbox5-speed
Power55.00 HP (40.1 kW)) @ 7250 RPM
Topspeed177.0 km/h (110.0 mph)
Torque58.00 Nm (5.9 kgf-m or 42.8 ft.lbs) @ 5500 RPM
TransmissiontypefinaldriveChain
Valvespercylinder4

Physical Measures & Capacities

Dryweight145.0 kg (319.7 pounds)
Fuelcapacity12.00 litres (3.17 gallons)
Powerweightratio0.3793 HP/kg
Seatheight860 mm (33.9 inches) If adjustable, lowest setting.

About KTM

Country of Origin: Austria
Founder: Hans Trunkenpolz (later joined by Ernst Kronreif)
Best Known For: Off-road/enduro supremacy, Dakar wins, Duke/RC streetbikes, and READY TO RACE ethos

Company History

KTM evolved from a postwar repair shop into a racing juggernaut by treating competition as R&D. Lightweight two-strokes made the brand a force in motocross and enduro; later four-strokes and advanced electronics cemented dominance. Dakar Rally victories showcased reliability under extreme conditions and fed the Adventure lineup—bikes that balance long-travel composure with startling pace. On the street, the Duke and RC families brought razor geometry and punchy singles/twins to license tiers worldwide, while the 1290 Super Duke and Adventure pushed the IMU-aided edge of performance. Corporate agility—acquisitions, platform sharing with Husqvarna/GASGAS—expanded reach without blurring identity. Historically, KTM changed expectations for chassis feedback and electronics integration in dirt and on road, proving that orange-painted ferocity could also be precise. The brand’s throughline is simple: build light, communicate grip, and let riders go fast safely. Few companies have turned a color and a slogan into such a reliable proxy for results.

Other Years

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