KTM 690 Duke

The KTM 690 Duke was a motorcycle developed for KTM's line of midrange single-cylinder engine supermoto, or naked motorcycles that began with the 1994 609 cc (37.2 cu in) displacement Duke 620 or Duke I, followed by the 1998 625 cc (38.1 cu in) Duke 640 or Duke II, followed by the 654 cc (39.9 cu in) Duke III, and finally the 690 cc (42 cu in) Duke IV made since 2012. Both the Duke III and Duke IV are called the 690 Duke^[1]

KTM 690 Duke

2012 690 Duke
Manufacturer	KTM
Also called	620/640/690/690 or I/II/III/IV
Production	1994–1997 (I) 1998-2007 (II) 2008–2011 (III) 2012–2018(IV)
Assembly	Austria
Class	Supermoto or Naked
Engine	693 cc (42.3 cu in) single
Bore / stroke	105.0 mm × 80.0 mm (4.13 in × 3.15 in)
Compression ratio	12.6:1
Top speed	183.5–188.1 km/h (114.0–116.9 mph)
Power	73 bhp (54 kW) at 8,000 rpm 75 bhp (56 kW) for R
Torque	74 N⋅m (55 lbf⋅ft)
Ignition type	Digital, 3 modes twin spark
Transmission	6-speed, chain drive, slipper clutch
Frame type	Steel trellis with aluminium swingarm
Suspension	Front-WP 43 mm (1.7 in) inverted forks Rear-WP linkage-actuated gas charged shock adjustable spring preload
Brakes	Front-Single Brembo M50 four-piston radial-mounted caliper, 320 mm (13 in) rotor, Bosch 2-channel ABS Rear-240 mm (9.4 in) floating single-piston caliper
Tires	Metzeler MR77 Front-120/70-17 Rear-160/60-17
Wheelbase	1,470 mm (58 in)
Seat height	865 mm (34.1 in)
Weight	149.5 kg (330 lb) (dry) 160 kg (350 lb) (wet)
Fuel capacity	13.5 L (3.0 imp gal; 3.6 US gal)
Related	640, 690 Enduro

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 999 cc (61.0 cu in) and later growing to 1,301 cc (79.4 cu in).

KTM Duke 620 I 1994–1997

KTM Duke 640 II 1998–2007

KTM 690 Duke III 2008–2011

2014 690 Duke IV 2012-2015

2018 690 Duke 2016-2018

Specifications

Year	1994–1997	1998–2007	2008–2011	2012	2013	2016–2018
Model	620 I	640 II	690 III	690 IV	690 R
Displacement	609 cc (37.2 cu in)	625 cc (38.1 cu in)	653.7 cc (39.89 cu in)	690 cc (42 cu in)	690 cc (42 cu in)	693 cc (42.3 cu in)[2]
Engine	4-valve SOHC 4 stroke single
Starting	Kick, Electric starter automatic compression release			Electric starter automatic compression release
Bore × stroke	101 mm × 76 mm (4.0 in × 3.0 in)	101 mm × 78 mm (4.0 in × 3.1 in)	102.0 mm × 80.0 mm (4.02 in × 3.15 in)	102.0 mm × 84.5 mm (4.02 in × 3.33 in)		105.0 mm × 80.0 mm (4.13 in × 3.15 in)
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		CDI	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, 140 mm (5.6 in) travel	WP inverted fork 135 mm (5.3 in) travel	WP inverted fork, adjustable preload, compression, rebound, 150 mm (5.9 in) travel	WP 4 3mm inverted fork
Rear suspension	WP monoshock	WP monoshock	WP monoshock, adjustable preload, compression, rebound, Pro-Lever, 140 mm (5.6 in) travel	WP shock, adjustable preload only, 135 mm (5.3 in) travel	WP shock, adjustable preload, compression, rebound, 150 mm (5.9 in) 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°, 109 mm (4.3 in)	26.5°, 115 mm (4.53 in)	26.5°
Wheelbase			1,470 mm (57.9 in)
Length
Width
Height
Seat height	890 mm (35 in)	900 mm (35 in)	876 or 895 mm (34.5 or 35.25 in)[3]	835 mm (32.9 in)	865 mm (34.1 in)
Dry weight			151 kg (334 lb)[4]	149.5 kg (330 lb) (claimed)[5][6]
Wet weight	150 kg (340 lb)[7]	161 kg (355 lb)[8]	160.6 kg (354.0 lb)[9]	160 kg (352 lb) (claimed)[10]
Fuel capacity	11 L; 2.5 imp gal (3 US gal)	11.5 L (2.5 imp gal; 3.0 US gal)	13.5 L; 2.97 imp gal (3.57 US gal)
Performance
Power		40 kW (54 bhp) @ 7,000 rpm[8]	44.5–45.9 kW (59.7–61.6 hp) @ 7,600 rpm[4][9]	50 kW (67 hp) (claimed)[5]	51.5 kW (69.1 hp) (claimed)[6]	54 kW (73 hp) (claimed)[1]
Torque		60 N⋅m (44 lb⋅ft) @ 5,500 rpm[8]	62.31–65.08 N⋅m (45.96–48.0 lb⋅ft) @ 5,425 rpm[4][9]		70.1 N⋅m (51.7 lb⋅ft)(claimed)[1]	75 N⋅m (55 lb⋅ft)(claimed)[1]
Fuel consumption		15.4 km/L (44 mpg‑imp; 36 mpg‑US)[8]	49.7–51 mpg‑US (4.73–4.61 L/100 km; 59.7–61.2 mpg‑imp)[4][9]
Top speed		120 mph (190 km/h)[8]	183.5–188.1 km/h (114–116.9 mph)[4][9]
0 to 60 mph (0 to 97 km/h) seconds		4.8[8]	3.6–3.92[4][9]
0 to 1⁄4 mi (0.00 to 0.40 km)			12.28 @ 168.42 km/h (104.65 mph)[4] 12.35 @ 164.09 km/h (101.96 mph)[9]
Braking 60 to 0 mph (97 to 0 km/h)			39.3 m (128.9 ft)[9]