Ducati St4 (1999)
1999 Ducati St4
CarHunch analysed 144 real MOT records for the 1999 Ducati St4. This breakdown of actual test outcomes — pass rates, defect profiles, mileage data — isn't published anywhere else.
The 1999 Ducati ST4 trails the UK average with a 75.2% first-time pass rate versus 80%, suggesting slightly above-average reliability issues for its age. While dangerous defects aren't epidemic at 12.5% of vehicles, that's still a concern worth investigating on any used example you're considering.
These bikes are running modest mileage for their age (median 20,388 miles), yet averaging 1.35 failures and 3.9 advisories per test, which points to age-related wear rather than hard use. Before buying, get a pre-purchase inspection focusing on the specific failure patterns—suspension, brakes, and electrical gremlins are typical on 25-year-old Italian sports bikes.
What to check before buying a 1999 Ducati St4
Practical pre-purchase checks for this age and model.
- 📋 Check the full MOT history. Look for recurring advisories — slow-building issues like corrosion or brake wear patterns show up years before they become failures. Enter the reg below for a full AI analysis.
- 🔍 Inspect for corrosion in person. Brake pipes, sills, subframes, and chassis legs. Surface rust is normal at this age; structural rust is a serious problem that's expensive to fix and can fail an MOT.
- 🛞 Check tyres and brakes. The most common advisory items at this age. Budget for replacement if they're near the limit — factor this into your offer price.
- 📄 Run an HPI check. The MOT history won't show outstanding finance, insurance write-offs, or stolen status — an HPI check will.
Before you buy a Ducati St4
MOT history is one piece of the puzzle. These checks can reveal what CarHunch can't.
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Pass Rate by Fuel Type
| Fuel type | Vehicles | Pass rate | Avg failures |
|---|---|---|---|
| Petrol (99%) | 143 | 75% | 1.36 |
| Diesel (1%) | 1 | 100% | 0 |
Mileage Distribution
Most 1999 Ducati St4 vehicles sit in the blue band. If the car you're looking at is outside it, it's either unusually low or high mileage for its age.
Half of all 1999 Ducati St4 vehicles fall between 12,976 and 26,335 miles.
1999 Ducati St4 — Still on the Road
Numbers are declining — 23 vehicles still getting MOTs in 2025 (38% of peak).
Based on vehicles from this manufacture year that had at least one MOT test in each calendar year. Data from 2014–2025.
MOT History Averages
Most Common MOT Issues — 1999 Ducati St4
Based on actual MOT test records for this model. Percentage shows how often each item appears across all vehicles in this cohort.
-
41.7%
Front Tyre worn close to the legal limit
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35.8%
Rear Tyre worn close to the legal limit
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25.4%
Drive chain slightly loose
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24.2%
Front Roller brake test indicates slight fluctuation of brake effort
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20.8%
Rear Brake pad(s) close to minimum limit
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17.5%
Rear mono-shock pivot worn but not excessive
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15.4%
Rear suspension bush has slight free play
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13.3%
Front Stop lamp does not illuminate immediately a brake applies
Data covers a 3-year window centred on 1999. Counts include advisories and failures.
Found a specific Ducati St4?
Enter the reg to see its individual MOT history, AI Hunches, and how it compares to this cohort.