| MODEL | DUCATI ST4S 2001 - 2002 |
| Year | 2001 - 2002 |
| Engine Type | Four-stroke 90° V-twin, desmodromic, 4 valves per cylinder |
| Displacement / Capacity | 996 cc |
| Bore X Stroke | 98 x 66 mm |
| Compression Ratio | 11.5:1 |
| Cooling System | — |
| Max Power | 85.3 kW / 117 hp @ 8750 rpm |
| Max Torque | 98 Nm / 72.2 lb-ft @ 7000 rpm |
| Ignition | Marelli electronic |
| Induction | — |
| Start System | Electric |
| TRANSMISSION SPECS | |
| Lubrication | Wet sump |
| Gear Box | — |
| Clutch | Wet multiplate, hydraulic control |
| Final Drive | Chain, 15/38 |
| CHASSIS SPECS | |
| Frame | — |
| Front Suspension | Showa 43 mm fully adjustable USD fork |
| Rear Suspension | Progressive linkage, fully adjustable Ohlins monoshock with remote preload adjuster |
| Front Brakes | 2 x 320 mm discs, 4-piston calipers, ABS |
| Rear Brakes | 245 mm disc, 2-piston caliper, ABS |
| DIMENSION SPECS | |
| Overall Length | 2070 mm / 81.4 in |
| Overall Width | 910 mm / 35.8 in |
| Overall Height | 1274 mm / 50.2 in |
| Seat Height | — |
| Wheelbase | — |
| Ground Clearance | — |
| Dry Weight | 202 kg / 467 lb |
| Wet Weight | — |
| WHEEL SPECS | |
| Front Tyre | 120/70 ZR17 |
| Rear Tyre | 190/50 ZR17 |
| FUEL SYSTEM | |
| Fuel Capacity | 21 Litres / 5.5 US gal |
| Fuel Consumption | 4.8 L/100 km / 50 US mpg |
| Top Speed | 249 km/h / 155 mph |
The ST4S was the sportier evolution of the ST4, using a 996 cc engine from the superbike line with about 117 hp. It added fully adjustable Showa front suspension, an Ohlins rear shock, lighter wheels with a wider rear tyre, and a stiffer chassis. It was positioned as the performance end of Ducati sport-touring range.
