| MODEL | KTM 660 SMC 2003 - 2006 |
| Year | 2003 - 2006 |
| Engine Type | Four stroke, single cylinder, SOHC, 4 valves |
| Displacement / Capacity | 653.7 cc / 39.9 cu in |
| Bore X Stroke | 102 x 80 mm |
| Compression Ratio | 11.5:1 |
| Cooling System | Liquid cooled |
| Max Power | 25.3 kW / 32.1 hp @ 6500 rpm |
| Max Torque | 43 Nm / 4.4 kgf-m / 31.7 lb-ft @ 4000 rpm |
| Ignition | DC-CDI 4K3 Kokusan contactless |
| Induction | Keihin MX FCR 41 |
| Start System | Kick & electric |
| TRANSMISSION SPECS | |
| Lubrication | — |
| Gear Box | 5 speed |
| Clutch | Wet, multiple discs, cable operated |
| Final Drive | Chain |
| CHASSIS SPECS | |
| Frame | Steel single cradle frame, chromium-molybdenum, powder coated |
| Front Suspension | 50 mm WP upside-down fork, 285 mm / 11.3 in travel |
| Rear Suspension | WP monoshock, swinging arm, 310 mm / 12.2 in travel |
| Front Brakes | Single 320 mm disc, Brembo 4-piston floating caliper |
| Rear Brakes | Single 220 mm disc |
| DIMENSION SPECS | |
| Overall Length | — |
| Overall Width | — |
| Overall Height | — |
| Seat Height | 910 mm / 35.8 in |
| Wheelbase | 1510 mm / 59.4 in |
| Ground Clearance | — |
| Dry Weight | 131 kg / 289 lbs |
| Wet Weight | — |
| WHEEL SPECS | |
| Front Tyre | 120/70 - 17 |
| Rear Tyre | 169/60 - 17 |
| FUEL SYSTEM | |
| Fuel Capacity | 9 L / 2.3 US gal / 2.0 Imp gal |
| Fuel Consumption | — |
| Top Speed | — |
A supermoto version of the 660 single, using the same 653.7 cc LC4-family engine as the Rally but with a Keihin carburettor and 17-inch wheels for road and track use. It is lighter than the rally model, with a 50 mm WP fork, a Brembo front caliper on a 320 mm disc, and an aluminium double-muffler exhaust. The page presents it as a light, powerful supermoto for its 2003 to 2006 production.
