KTM 690 Duke Specs (2008)
KTM first introduced the Duke in 1994 as a supermoto bike featuring a 609cc single-cylinder which came to life using a kick start. It was the manufacturer’s first stock supermoto machine and it could be easily distinguished due to its unique styling and spoked wheels. The 2008 KTM 690 Duke has single cylinder, 4-stroke with total displacement reach 654cc. Find more information about KTM 690 Duke specification in the following table.
ENGINE
| Engine type |
Single cylinder, 4-stroke |
| Displacement |
654 cc |
| Bore x stroke |
102 / 80 mm (4.01 / 3.15″) |
| Performance (homologated) | 48 kW / 7500 rpm |
| Max. torque | 67 Nm / 5500 rpm |
| Compression ratio | 11.8:1 |
| Starter/Battery |
E-Starter / 12 V 8.6 Ah |
| Transmission | 6 gears, dog clutch engagement |
| Fuel Mixture Generation | Keihin EFI with EPT (Electr. Power Throttle) |
| Control | 4 V / OHC with roller rocker levers |
| Lubrication | Pressure lubrication with 2 Eaton pumps |
| Engine lubrication | Motorex, fully synthetic, SAE 10W-60 |
| Primary ratio | 36:79 |
| Final drive | 16:40 |
| Cooling |
Liquid cooled |
| Clutch | APTC slipper clutch, hydraulically operated |
| Motor management | Keihin EMS |
CHASSIS
| Frame | Chromium-Molybdenum trellis frame, powder coated |
| Subframe | Aluminium 7020 |
| Handlebar | Aluminium, Ø 28 / 22 mm (1.10 / 0.87″), tapered |
| Front Suspension | WP USD Ø 48 mm (1.89″) |
| Rear Suspension |
WP mono shock with Pro-Lever linkage |
| Suspension travel front/rear | 140 / 140 mm (5.51 / 5.51″) |
| Front brake | Brembo four piston, radially bolted caliper, brake disc Ø 320 mm (12.6″) |
| Rear brake | Brembo single piston, floating caliper, brake disc Ø 240 mm (9.45″) |
| Rims, front/rear | Cast aluminium wheels 3.5 x 17″; 5 x 17″ |
| Tires, front/rear | 120/70 R 17″; 160/60 R 17″ |
| Chain | X-Ring 5/8 x 1/4″ |
| Main Silencer |
Stainless steel underfloor silencer with integrated catalytic converter |
| Steering head angle | 63.5° |
| Trail | 115 mm (4.53″) |
| Wheel base | 1472 ± 15 mm (57.95 ± 0.59″) |
| Ground clearance (unloaded) | 155 mm (6.1″) |
| Seat height | 865 mm (34.06″) |
| Tank capacity | approx. 13.5 liters / 2.5 liters reserve (3.56 / 0.66 gal) |
| Weight (ready to race) | approx. 148.5 kg (327.4 lbs) |
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