| KTM 690 Duke | |
| Aka: | 620/640/690/690 or I/II/III/IV |
| Manufacturer: | KTM |
| Production: | 1994–1997 (I) 1998-2007 (II) 2008–2011 (III) 2012–2018(IV) |
| Assembly: | Austria |
| Class: | Supermoto or Naked |
| Engine: | 693cc single |
| Compression: | 12.6:1 |
| Power: | at 8,000 rpm for R |
| Ignition: | Digital, 3 modes twin spark |
| Transmission: | 6-speed, chain drive, slipper clutch |
| Frame: | Steel trellis with aluminium swingarm |
| Suspension: | Front-WP 43mm inverted forks Rear-WP linkage-actuated gas charged shock adjustable spring preload |
| Brakes: | Front-Single Brembo M50 four-piston radial-mounted caliper, 320mm rotor, Bosch 2-channel ABS Rear-240mm floating single-piston caliper |
| Tires: | Metzeler MR77 Front-120/70-17 Rear-160/60-17 |
| Fuel System: | EFI Keihin 50 mm throttle body |
| Related: | 640, 690 Enduro |
| Sp: | US |
The KTM 690 Duke is the latest generation in KTM's line of midrange single-cylinder engine supermoto, or naked motorcycles that began with the 1994 609cc displacement Duke 620 or Duke I, followed by the 1998 625cc Duke 640 or Duke II, followed by the 654cc Duke III, and finally the 690cc Duke IV made since 2012. Both the Duke III and Duke IV are called the 690 Duke[1]
The Duke was KTM's first street bike, and first supermoto, having previously made only off-road and racing motorcycles. In 1998 KTM introduced the 640 Supermoto, so the Duke line became a more street oriented standard or streetfighter, while retaining some off-road characteristics like a relatively long suspension travel. Initially the Duke was KTM's entry level street bike, but later KTM partnered with Bajaj Auto to produce the 125 Duke, 200 Duke, and 390 Duke in India, placing the 600 cc class Dukes in the middle of their range. In 2005, KTM introduced the Super Duke to expand the range above the middle Duke, initially 999cc and later growing to 1301cc.
| Year | 1994–1997 | 1998–2007 | 2008–2011 | 2012 | 2013 | 2016–2018 | |
|---|---|---|---|---|---|---|---|
| Model | 620 I | 640 II | 690 III | 690 IV | 690 R | ||
| Displacement | 609cc | 625cc | 653.7cc | 690cc | 690cc | 693cc[2] | |
| Engine | |||||||
| Starting | Electric starter automatic compression release | ||||||
| Bore × stroke | 101mm76mm | 101mm78mm | 102mm80mm | 102mm84.5mm | 105mm80mm | ||
| Compression | 11.7:1 | ||||||
| Fuel system | Dell'Orto carburetor (49-state) 38 mm Edelbrock Qwik Silver II (California) | Keihin EFI | Keihin EFI 3 modes | EFI Keihin 50 mm throttle body | |||
| Ignition | Digital, 3 Modes, Single Spark plug. | Digital, 3 modes, twin spark | Digital, 3 modes, twin spark | ||||
| Transmission | 5-speed, chain drive | 6 speed, chain drive, Slipper Clutch | 6-speed, chain drive, slipper clutch | ||||
| Frame | Steel trellis, aluminum swingarm | Chromoly steel trellis | Steel trellis | Chromoly steel trellis | |||
| Front brake | Brembo 4-piston caliper, 320 mm disc | Single Brembo four-piston radial caliper, 320 mm disc | Single Brembo four-piston radial caliper, 320 mm disc | Single four-piston radial caliper, 320 mm disc, ABS | Single four-piston Brembo M50 radial caliper, 320 mm disc, ABS | Single Brembo M50 four-piston radial-mounted caliper, 320 mm rotor, Bosch two-channel ABS | |
| Rear brake | Brembo 1-piston caliper, 220 mm disc | Brembo caliper, 240 mm disc | Single four-piston caliper, 240 mm disc | 240 mm floating single-piston caliper | |||
| Front suspension | WP 40 mm telescopic fork | WP 43 inverted fork | 48 mm WP inverted fork, adjustable preload, compression, rebound, 5.6inches travel | WP inverted fork 135mm travel | WP inverted fork, adjustable preload, compression, rebound, 150mm travel | WP 4 3mm inverted fork | |
| Rear suspension | WP monoshock | WP monoshock | WP monoshock, adjustable preload, compression, rebound, Pro-Lever, 5.6inches travel | WP shock, adjustable preload only, 135mm travel | WP shock, adjustable preload, compression, rebound, 150mm travel | WP linkage-actuated gas-charged shock adjustable spring preload | |
| Wheels | Akront wire-spoke, 17 × 3.5" front 17 × 4.5" rear | 17 × 3.5" front 17 × 4.5" rear | 17-inch 5 spoke Marchesini forged Alum wheels | 17-inch, 10-spoke forged-aluminum | |||
| Tires | Pirelli MT60 radial | 120/70-17 front 160/70-17 rear | Dunlop Sportmax GPR 120/70-ZR17 front 160/60-ZR17 rear | Metzeler MR77 120/70-17 front 160/60-17 rear | |||
| Rake, trail | 26.5°, 109mm | 26.5°, 4.53inches | 26.5° | ||||
| Wheelbase | 57.9inches | ||||||
| Length | |||||||
| Width | |||||||
| Height | |||||||
| Seat height | 35inches | 900mm | 34.5or | 835mm | 865mm | ||
| Dry weight | 334lb | 149.5kg (329.6lb) (claimed) | |||||
| Wet weight | 340lb | 161kg (355lb) | 354lb | 352lb (claimed) | |||
| Fuel capacity | 3usgal | 11.5L | 3.57usgal | ||||
| Performance | |||||||
| Power | 54bhp @ 7,000 rpm | 59.7- @ 7,600 rpm | 50kW (claimed) | 51.5kW (claimed) | 73hp (claimed) | ||
| Torque | 44lbft @ 5,500 rpm | 45.96- @ 5,425 rpm | 51.7lbft(claimed) | 55lbft(claimed) | |||
| Fuel consumption | 15.4km/L | 49.7mpgus51mpgus | |||||
| Top speed | 120mph | 114- | |||||
| 0mph60mph seconds | 4.8 | 3.6–3.92 | |||||
| 0milesNaNmiles | 12.28 @ 104.65mph 12.35 @ 101.96mph | ||||||
| Braking 60mph0mph | 128.9feet | ||||||