KTM Duke 640: history, specs, pictures
| Manufacturer | KTM |
|---|---|
| Also called | Duke II640, Duke II 640, 640 Duke, 640 Duke II Yellow - Black, 640 Duke II Black, 640 Duke II Red, 640 Duke II Limited Edition, 640 Duke II |
| Production | 1999 - 2007 |
| Engine | single cylinder, four-stroke |
| Bore / Stroke | 101.0mm x 78.0mm |
| Top speed | 110 mph (177 km/h) |
| Horse Power | 52.57 HP (39.2 KW) @ 6750RPM |
| Torque | 44.26 ft/lbs (60.0 Nm) @ 5500RPM |
| Fuel system | carburettor. mikuni bst 40 |
| Ignition type | kokusan dc-cdi |
| Battery | 11.7:1 |
| Transmission | Gear box: 5-speed Final Drive: chain |
| Suspension | Front: wp usd Rear: wp monoshock |
| Brakes | Front: single disc Rear: single disc |
| Front Tire | 120/70-17 |
| Rear Tire | 160/70-17 |
| Wheelbase | 57.48 inches (1460 mm) |
| Dimensions | W 25.2 inches (640 mm) H 25.2 inches (640 mm) |
| Seat height | 35.43 inches (900 mm) |
| Weight | 335.1 pounds (152.0 Kg) |
| Fuel capacity | 2.96 Gallon (11.20 Liters) |
| Manuals | Service Manual |
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The KTM 640 Duke II was a single cylinder, four-stroke standard produced by KTM between 1999 and 2007. It could reach a top speed of 110 mph (177 km/h). Max torque was 44.26 ft/lbs (60.0 Nm) @ 5500 RPM. Claimed horsepower was 52.57 HP (39.2 KW) @ 6750 RPM.
Engine
The engine was a liquid cooled single cylinder, four-stroke. A 101.0mm bore x 78.0mm stroke result in a displacement of just 625.0 cubic centimeters. Fuel was supplied via a overhead cams (ohc).
Drive
The bike has a 5-speed transmission. Power was moderated via the wet multi-disc clutch, operated hydraulically.
Chassis
It came with a 120/70-17 front tire and a 160/70-17 rear tire. Stopping was achieved via single disc in the front and a single disc in the rear. The front suspension was a wp usd while the rear was equipped with a wp monoshock. The 640 Duke II was fitted with a 2.96 Gallon (11.20 Liters) fuel tank. The bike weighed just 335.1 pounds (152.0 Kg). The wheelbase was 57.48 inches (1460 mm) long.