| KTM's profilation of this bike | 
  | KTM presents the 690 Duke, the ultimate single-cylinder naked bike! It´s driven by the 
most powerful, 65 HP (48 kW), street-legal single of all time, equipped with a superior street suspension and assembled with a discernible passion for design and technology. | 
    
        | General information | 
  
    | Motorcycle name | KTM 690 Duke | 
    | Model year | 2008 | 
    | Category | Naked bike | 
    | Rating | 4.1   See the detailed rating of engine performance, design and look, accident risk, etc. Compare with any other motorcycle. | 
    
        | Engine and transmission | 
  
    | Displacement | 654.0 ccm (39.91 cubic inches) | 
    | Engine type | Single cylinder, four-stroke | 
    | Power output | 64.4 HP (47.0  kW)) @ 7500 RPM | 
    | Torque | 67.0 Nm (6.8 kgf-m or 49.4 ft.lbs) @ 5500 RPM | 
    | Compression | 11.8:1 | 
    | Bore x stroke | 102.0 x 80.0 mm (4.0 x 3.1 inches) | 
    | Valves per cylinder | 4 | 
    | Fuel system | Carburettor | 
    | Fuel control | Overhead Cams (OHC) | 
    | Ignition | 2 X keihin | 
    | Lubrication system | Pressure lubrication with 2 Eaton pumps | 
    | Cooling system | Liquid | 
    | Gearbox | 6-speed | 
    | Clutch | APTC Wet multi-disc clutch, operated hydraulically | 
    | Exhaust system | Stainless steel underfloor silencer with integrated catalytic converter | 
    
        | Chassis, suspension, brakes and wheels | 
  
    | Frame type | Chromium-molybdenum trellis frame, powder-coated | 
    | Front suspension | WP USD | 
    | Front wheel travel | 200 mm (7.9 inches) | 
    | Rear suspension | WP monoshock | 
    | Rear wheel travel | 210 mm (8.3 inches) | 
    | Front tire | 120/70-17 | 
    | Rear tire | 160/60-17 | 
    | Front brakes | Single disc | 
    | Diameter | 320 mm (12.6 inches) | 
    | Rear brakes | Single disc | 
    | Diameter | 220 mm (8.7 inches) | 
    
        | Physical measures and capacities | 
  
    | Dry weight | 148.5 kg (327.4 pounds) | 
    | Power/weight ratio | 0.4334 HP/kg | 
    | Seat height | 865 mm (34.1 inches) If adjustable, lowest setting. | 
    | Ground clearance | 155 mm (6.1 inches) | 
    | Wheelbase | 1472 mm (58.0 inches) | 
    | Fuel capacity | 13.50 litres (3.57 US gallons) | 
    
        | Other specifications | 
  
    | Starter | Electric | 
| Update specs | Report missing specs or required updates. | 
    
        | Further information | 
  | Insurance costs | Compare US insurance quotes from the nation's top providers. | 
| Maintenance | Find parts, fluids. filters, maintenance tools and service manuals at Amazon.com. | 
| Ask questions | Join the 08 KTM 690 Duke discussion group or the general KTM discussion group. | 
| Related bikes | List related bikes for comparison of specs. | 
    
        | Compare with another motorcycle | 
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