2005 · Sport Tourer · Buyer's Guide
Superbike Soul, Luggage Hooks
The 2005 ST4S is Ducati's sport tourer built around the liquid-cooled Desmoquattro, the four-valve 90° V-twin from the brand's superbike line. It displaces 996 cc and makes 121 hp and 72 lb-ft, but the peak figures matter less than how it delivers them. The midrange is fat, and the engine keeps pulling cleanly toward the redline. It sits in a steel trellis frame with fully adjustable suspension at both ends. A center stand comes standard, and ABS is an option. That mix gives it a sharper edge than most bikes built to carry you across a state line in comfort.
On the road it rewards a rider who likes to work a motorcycle. Lean clearance is generous, the chassis stays composed at highway speed, and it tells you what the tires are doing. With 538 lb (244 kg) wet and a 5.5 gal (21 L) tank, it's built for long days with the twisty section as the reward. The honest caveat is ownership. Have the alternator nut checked at every service. Rocker arms can shed their chrome between 12,000 and 24,000 miles, and regulator/rectifiers are known to fail. Buy one with a documented history, not just good looks.
Spec sheets don't ride bikes, but they set the baseline.
| Power | 121 hp (89 kW) @ 8,750 rpm |
|---|---|
| Torque | 72 lb-ft (98 Nm) @ 7,000 rpm |
| Displacement | 996 cc |
| Engine | 90° V-twin |
| Cooling | Liquid-cooled |
| Gearbox | 6-speed |
| Final drive | Chain |
| Fork | Upside-down (USD) |
| Front brake | 320 mm |
| Front tire | 120/70-17 |
| Rear tire | 180/55-17 |
| Wheelbase | 56.3 in (1430 mm) |
| Seat height | 32.3 in (820 mm) |
| Wet weight | 538 lb (244 kg) |
| Fuel capacity | 5.5 gal (21 L) |
Equipment check
Chassis
Comfort
Safety
Over the years I've heard a lot about the ST4S: in the paddock, at club nights, over coffee with owners, and in the emails and messages riders send me directly. Across all of that, the pattern is consistent. Owners love the engine and the way the bike handles a winding road, and they're just as open about what it costs to keep one running.
The engine is what owners bring up first. Riders consistently describe real superbike performance in a bike built for touring, with a muscular midrange and a top-end rush that howls. Several say the bike feels special and exotic in a way their Japanese machines never did. They point to the clatter of the desmodromic valvetrain and the deep exhaust note as part of that. One rider singles out the six-speed gearbox for its precise, mechanical shift feel.
Handling comes up almost as often. Riders describe the ST4S as confident in corners, stable but still agile, and at its best on twisty roads. On ergonomics, owners mention a riding position that splits the difference between sporty and long-distance, with a supportive seat and well-placed controls.
The most common complaint is running costs. Owners point to valve checks every 6,000 miles (9,650 km), cam belt replacements every two years and expensive parts, and they say upkeep runs well above what the Japanese rivals ask. The other gripes come from individual riders and aren't repeated widely. One finds the factory suspension settings track-biased and harsh over bumps on long trips. Another calls the hydraulic clutch tiring in stop-and-go traffic and says an aftermarket slave cylinder is a common fix to lighten the pull. Some mention vibration through the bars and pegs that wears on them during long highway stints. Others say the engine gets jerky below 4,000 rpm and needs clutch work in slow corners and traffic.
Alternator nut loosening
The alternator nut can work loose, causing potential internal engine damage if not tightened at service intervals.
Rocker arm flaking
On pre-testastretta 996 engines, the chrome plating on the rocker arms can flake off, leading to wear and requiring replacement. Typically manifests around 12,000–24,000 miles.
Regulator/rectifier failure
The electrical charging component is known to fail, leading to battery drain or overcharging.
Where this Ducati ST 4 S pulls ahead of — or falls behind — its rivals on the numbers, and the typical bike in its class on character.
Power
Torque
Displacement
Wet weight
Seat height
Forget spec-sheet bragging. Here's who the ST 4 S is actually built for.
For repeat days on the Dragon and Cherohala, the ST4S has the lean clearance and honest feedback to refine your lines, and it stays calm on the highway ride in from Atlanta or Knoxville.
Made for Back of the Dragon · Blue Ridge Parkway · Cherohala Skyway
If your days run 200 to 400 miles over the Blue Ridge or Highway 1, this is a sport tourer that leans toward sport. Expect sharp handling and a planted feel, not armchair luxury.
Made for Black Hills · Blue Ridge Parkway · Cherohala Skyway
If this one isn't quite the fit, these are the bikes worth riding back-to-back against it.
