The Ducati ST4S, produced from 2001-02, features a liquid-cooled, 996cc L twin cylinder engine with a compression ratio of 11.5:1 and fuel injection. It has a maximum power output of 117 hp at 8750 rpm and maximum torque of 98 Nm at 7000 rpm. The bike has a wet multiplate clutch and a six-speed transmission with a straight cut gear primary drive. The frame is tubular steel trellis and the suspension system includes a Showa 43mm fully adjustable upside-down front fork and a progressive linkage with fully adjustable Ohlins monoshock with remote control preload adjustment. Braking features include two 320mm discs with four-piston calipers at the front and a single 245mm disc with two-piston caliper at the rear, both equipped with ABS. The ST4S weighs 202 kg dry and has a fuel capacity of 21 litres. The standing quarter mile time is 10.7 seconds and the top speed is 249 km/h.
Technical specifications:
Make Model: Ducati ST4S
| Year | 2001 – 02 |
|---|---|
| Engine | Four stroke, 90 degrees L twin cylinder, DOHC, desmodromic 4 valve per cylinder. |
| Capacity | 996 cc / 60.8 cu in |
| Bore x Stroke | 98 x 66 mm |
| Cooling System | Liquid cooled |
| Compression Ratio | 11.5:1 |
| Lubrication | Wet sump |
| Engine Oil | Synthetic, 20W/50 |
| Exhaust | 2 aluminum mufflers with catalytic converter (non-catalytic on USA version) |
| Induction | Fuel injection, 50 mm throttle body |
| Ignition | Marelli electronic |
| Spark Plug | Champion, RA59GC |
| Starting | Electric |
| Battery | 12V 10Ah |
| Max Power | 85.3 kW / 117 hp @ 8750 rpm |
| Max Torque | 98 Nm / 10 kgf-m / 72.2 ft-lb @ 7000 rpm |
| Clutch | Wet multiplate with hydraulic control |
| Transmission | 6 Speed |
| Final Drive | Chain; front sprocket 15; rear sprocket 38 |
| Gear Ratio | 1st 37/15, 2nd 30/17, 3rd 27/20, 4th 24/22, 5th 23/24, 6th 24/28 |
| Primary Drive | Straight cut gears; ratio 1.84:1 (32/59) |
| Frame | Tubular steel trellis |
| Front Suspension | Showa 43 mm fully adjustable upside-down front fork with TiN surface treatment, |
| Front Wheel Travel | 130 mm / 5.1 in |
| Rear Suspension | Progressive linkage with fully adjustable ~Ahlins monoshock with remote control preload adjustment. Aluminium swingarm |
| Rear Wheel Travel | 148 mm / 5.8 in |
| Front Brakes | 2x 320mm discs 4 piston calipers with abs |
| Rear Brakes | Single 245mm disc 2 piston caliper with abs |
| Front Wheel | 5-spoke light alloy 3.50 x 17 |
| Rear Wheel | 5-spoke light alloy 5.50 x 17 |
| Front Tyre | 120/70 – ZR17 |
| Rear Tyre | 190/50 – ZR17 |
| Rake | 24 degrees |
| Dimensions | Length 2070 mm / 81.4 in Width: 910mm / 35.8in Height 1274 mm / 50.2 in |
| Wheelbase | 1430 mm / 56.3 in |
| Seat Height | 820 mm / 32.3 in |
| Dry Weight | 202 kg / 467 lbs |
| Fuel Capacity | 21 Litres / 5.5 US gal / 4.6 Imp gal |
| Consumption Average | 4.8 L/100 km / 20.8 km/l / 50 US mpg / 59 Imp mpg |
| Standing 1/4 Mile | 10.7 sec |
| Top Speed | 249 km/h / 155 mph |
