Bultaco Unknown (1981)
1981 Bultaco Unknown
CarHunch analysed 355 real MOT records for the 1981 Bultaco Unknown. This breakdown of actual test outcomes — pass rates, defect profiles, mileage data — isn't published anywhere else.
What to check before buying a 1981 Bultaco Unknown
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 Bultaco Unknown
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%) | 353 | 2% | 0 |
| Diesel (1%) | 2 | 0% | 0 |
Mileage Distribution
Most 1981 Bultaco Unknown 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 1981 Bultaco Unknown vehicles fall between 2 and 21 miles.
MOT History Averages
Most Common MOT Issues — 1981 Bultaco Unknown
Based on actual MOT test records for this model. Percentage shows how often each item appears across all vehicles in this cohort.
-
11.1%
No lights fitted at time of test.
-
11.1%
Centre Front no lights fitted
-
11.1%
Daylight use only - no lights fitted
-
11.1%
Bike tested for daytime use only
-
11.1%
Offside Front shock absorber has light misting of stanchion
-
11.1%
no light fitted ,daytime use only
-
11.1%
Front Wheel bearing has slight play
-
11.1%
no lights fitted at time of test. daytime use only
Data covers a 3-year window centred on 1981. Counts include advisories and failures.
Found a specific Bultaco Unknown?
Enter the reg to see its individual MOT history, AI Hunches, and how it compares to this cohort.