Supermotos
2006KTM 640 Duke II
38 fields on record
The 2006 KTM 640 Duke II is a single-cylinder street bike with supermoto character and distinctive styling. Its liquid-cooled 625cc single makes 49 hp and 54 Nm through a five-speed gearbox, for a top speed of about 170 km/h. An 880 mm seat, 145 kg dry weight and 12-litre tank suit twisty roads.
- Capacity
- 625.0 ccm
- Engine
- Single, four-stroke
- Gearbox
- 5-speed
- Dry weight
- 145.0 kg
- Seat height
- 880 mm
- Power
- 49.0 HP (36.0 kW)
How it rides
Editorial estimate from the spec sheet - not lab tested- Best for
- A lightweight, muscular street naked designed for sharp handling, urban fun, and spirited backroad riding rather than outright speed or distance.
- Built for
- Gritty, torquey, and mechanical in feel, this bike rewards riders who enjoy an engaging, old-school single-cylinder thumper experience with premium WP suspension.
- Not ideal for
- Not a good fit for riders seeking smooth long-distance comfort, pillion-friendly touring capability, or high top-speed thrills.
Scores are derived from the spec sheet using the same model across every bike, so they compare like for like.
Will it fit you?
Worked out in your browser - nothing is sent to usEngine
- Capacity
- 625.0 ccm
- Power
- 49.0 HP (36.0 kW)
- Torque
- 54.0 Nm (5.5 kgf-m)
- Engine type
- Single, four-stroke
- Power/weight ratio
- 0.3379 HP/kg (dry)
- Bore x stroke
- 101.0 x 78.0 mm
- Compression
- 11.7:1
- Cooling system
- Liquid
- Fuel system
- Carburettor
- Starting
- Electric & kick
- Ignition
- Kokusan DC-CDI
- Valves per cylinder
- 4
- Lubrication system
- Pressure lubrication with 2 oil pumps
Transmission
- Gearbox
- 5-speed
- Transmission type
- Manual
- Final drive
- Chain
- Clutch
- Wet multi-disc clutch, operated hydraulically
Performance
- Top speed
- 170.0 km/h (105.6 mph)
Dimensions & weight
- Wheelbase
- 1460 mm
- Seat height
- 880 mm
- Dry weight
- 145.0 kg
- Fuel capacity
- 12.00 litres
- Ground clearance
- 280 mm
Chassis & suspension
- Frame
- Chromium-molybdenum, powder-coated
- Front suspension
- WP USD
- Rear suspension
- WP monoshock
- Front wheel travel
- 140 mm
- Rear wheel travel
- 170 mm
- Rake (fork angle)
- 26.5°
- Trail
- 109 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
- 160/70-17
Other
- Color options
- Silver/black, green/black
Specs last verified against published sources: .
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 | 1999 | 2002 | 2004 | 2005 | 2006 | 2007 |
|---|---|---|---|---|---|---|
| Capacity | 625 cc | 625 cc | 625 cc | 625 cc | 625 cc | 625 cc |
| Dry weight | 145 kg | 145 kg | 145 kg | 145 kg | 145 kg | 152 kg |
| Seat height | 880 mm | 880 mm | 880 mm | 880 mm | 880 mm | 900 mm |
| Fuel capacity | 12 L | 12 L | 12 L | 12 L | 12 L | 11.2 L |
Illustrative - generated automatically by diffing the year records already on file, not a manufacturer-published changelog.
Rider Reviews
Common questions
What is the engine size of the KTM 640 Duke II?
The 2006 KTM 640 Duke II has a Capacity of 625.0 ccm (38.14 cubic inches).
What engine power does the KTM 640 Duke II have?
The 2006 KTM 640 Duke II has a Power of 49.0 HP (36.0 kW).
How many gears does the KTM 640 Duke II have?
The 2006 KTM 640 Duke II has a Gearbox of 5-speed.
What is the torque of the KTM 640 Duke II?
The 2006 KTM 640 Duke II has a Torque of 54.0 Nm (5.5 kgf-m or 39.8 ft.lbs).
How much does the KTM 640 Duke II weigh?
The 2006 KTM 640 Duke II has a Dry weight of 145.0 kg (319.7 pounds).
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