KTM 640 LC4 Adventure
| Production Year: | 1999, 2000 |  |
| Type: | Single cylinder, four-stroke, liquid cooled |
| engine specs | |
| Type | Single cylinder, four-stroke, liquid cooled |
| Displacement | 625 cm3 |
| Bore X Stroke | 4x3.1 in OR 102 mm |
| Compression Ratio | 11.7:1 |
| Horsepower | 52/7000 KW(hp)/RPM |
| Torque | 41/5500 lb-ft/RPM OR 56/5500 Nm/RPM |
| Fuel System | Mikuni BST 40 Carburetor |
| transmission specs | |
| Gearbox | 5-Speed |
| Clutch | Wet multidisc clutch, operated hydraulically |
| Primary Drive | 31:79 |
| Final Drive | Chain |
| chassis specs | |
| Frame | Chromium-molybdenum, powder-coated |
| Front Suspension | WP-USD 48 mm |
| Rear Suspension | WP monoshock |
| Front Brake | Double disc 300 mm |
| Rear Brake | Single disc 200 mm |
| dimension specs | |
| Seat Height | 37.2 in OR 945 mm |
| Ground Clearance | 12.4 in OR 315 mm |
| Weight | 348 lbs OR 158 kg |
| Fuel Capacity | 6.7 gallons OR 25.4 L |
| Wheelbase | 59.4 in OR 1509 mm |
| tyres specs | |
| Front | 90/90-21 |
| Rear | 140/80-18 |
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