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Ducati ST4: 1999–2005 sport-touring motorcycle, what to check
Ducati ST4 — a sport-touring motorcycle with a 916 cm³ liquid-cooled twin engine, produced from 1999–2005. We look at its versions, engine, and what to check when buying used.
ST4 in brief
The ST4 was designed for those who needed a superbike-type engine with a more comfortable touring seat. It combined Ducati's twin-cylinder 'Desmoquattro' engine with a windshield and the option to attach side panniers.
Today, it's a rarer but still interesting used Ducati model for those who want classic Ducati tech and comfort.
Versions and choice
The base version is the ST4 with a 916 cm³ engine. Later came the ST4S with a larger 996 cm³ engine and some updates; the latter often had ABS too (depending on the year).
Due to its age, the main choice criterion is technical condition, not the version.
Engine and gearbox
The ST4 engine is a 916 cm³ liquid-cooled twin 'Desmoquattro' with four valves per cylinder; power is around 100 hp. The ST4S has a larger 996 cm³ engine and a bit more power.
The gearbox is a 6-speed manual, with drive to the rear wheel via chain.
What to check when buying a used ST4
Timing belts and valve adjustments are the key points. 'Desmoquattro' engines need regular servicing, so ask for records of work done.
Check the electrical installation, battery, and charger — older Ducatis often have electrical issues. Inspect the cooling system and oil leaks.
Due to age, check the suspension, brakes, chain, sprockets, plastics, side panels, and windscreen.
Trim levels
Names and equipment vary by market and year; we list the versions most commonly found in Europe.
ST4
1999–2005The base version with a 916 cm³ engine.
- The powerful Desmoquattro engine
- Touring seat and wind protection
- Often — side panels
ST4S
From 2001 onwardsUpdated version with a larger engine.
- 996 cm³ engine
- A bit more power
- Often — ABS (depending on the year)
Comparison of ST4 versions
| ST4 | ST4S | |
|---|---|---|
| Who's it for? | For sporty touring | For slightly more powerful touring |
| Engine | 916 cm³, around 100 hp | 996 cm³, more power |
| Price in the used market (relatively) | Mid-range | Mid-range |
The ST4 is for those who want a Superbike-style engine with a touring seat. When buying, the service history is crucial.
Pros
- A powerful, characterful engine
- More comfortable seating than a Superbike
- Classic Ducati design
- Suitable for both short and long trips
Cons
- Due to its age, many parts may be worn out
- Maintenance is more expensive than for Japanese motorcycles
- Searching for parts may take time
Frequently asked questions
How does the ST4 differ from the ST2?
The ST4 has a more powerful liquid-cooled engine with four valves per cylinder, while the ST2 has a simpler air-cooled engine.
Is the ST4 suitable for long journeys?
Yes, it's designed for comfort and can tow trailers, but due to its age, you should check the technical condition before a long trip.
Is the ST4S worth the extra cost?
The ST4S has a larger engine and ABS in some cases, so it's worth considering if power and safety features are important.
Updated 2026-10-21 · Trim levels and equipment vary by market and model year — check the equipment of the specific car. · Translated automatically
