Derbi Unclassified MOT Pass Rate
Overall pass rate across all manufacture years, based on 715 real MOT test results. Failure rate: 42.1%.
Data from official DVSA MOT testing records
Derbi Unclassified MOT Reliability Overview
The Derbi Unclassified is a rare vehicle in the UK, with 715 MOT test results recorded in our database spanning 8 manufacture years. It has an overall MOT pass rate of 57.9% and a failure rate of 42.1%, which is slightly below the UK average of approximately 37%.
Based on this data, the Derbi Unclassified earns a "Below Average" reliability rating. The average Derbi Unclassified presents for MOT with approximately 11,313 miles on the clock. Manufacture year matters: 2015 models achieve the highest pass rate at 67.6%, while 2004 models have the lowest at 40.7%. This 26.9 percentage point difference suggests notable variation in build quality or component durability across production years.
The most common MOT failure for the Derbi Unclassified is Motorcycle lighting and signalling, affecting 32.4% of all tests. Motorcycle lighting and signalling issues are a common cause of MOT failure. Regular inspection and maintenance of these components helps ensure your vehicle passes its MOT. The second most common issue is Motorcycle brakes at 27.0%. Motorcycle steering and suspension rounds out the top three at 21.8%. Together, these top 3 failure categories account for a significant portion of all MOT failures for this model.
Top failures across all manufacture years combined. Individual year pages may show different top failures.
What Fails Most
Pass Rate by Manufacture Year
* High Fail Rate badge indicates an MOT pass rate below 65% (failure rate above 35%).
What Fails on This Car?
Click a category to see specific failure items.
View as table
| Rank | Failure Category | Rate (%) | Count |
|---|---|---|---|
| 1 | Motorcycle Lighting And Signalling | 53.4% | 382 |
| 2 | Motorcycle Brakes | 35.5% | 254 |
| 3 | Motorcycle Steering And Suspension | 28.7% | 205 |
| 4 | Motorcycle Drive System | 17.3% | 124 |
| 5 | Motorcycle Lamps And Reflectors | 12.3% | 88 |
| 6 | Motorcycle Tyres And Wheels | 11.6% | 83 |
| 7 | Motorcycle Structure And Attachments | 5.7% | 41 |
| 8 | Motorcycle Fuel And Exhaust | 5.6% | 40 |
| 9 | Motorcycle Suspension | 4.6% | 33 |
| 10 | Motorcycle Body And Structure | 3.8% | 27 |
| 11 | Motorcycle Driving Controls | 3.6% | 26 |
| 12 | Motorcycle Tyres | 1.7% | 12 |
| 13 | Motorcycle Steering | 1.7% | 12 |
| 14 | Motorcycle Reg Plates And Vin | 1.4% | 10 |
| 15 | Motorcycle Wheels | 1.4% | 10 |
Failures per 10,000 Miles
avg. 11,313 miFor every 10,000 miles driven, this shows what percentage of MOT tests fail for each category. This accounts for how far cars are actually driven, not just raw pass/fail counts.
View as table
| Category | Rate / 10K mi | Raw % | Count |
|---|---|---|---|
| Motorcycle lighting and signalling | 47.23 | 53.4% | 382 |
| Motorcycle brakes | 31.40 | 35.5% | 254 |
| Motorcycle steering and suspension | 25.34 | 28.7% | 205 |
| Motorcycle drive system | 15.33 | 17.3% | 124 |
| Motorcycle lamps and reflectors | 10.88 | 12.3% | 88 |
| Motorcycle tyres and wheels | 10.26 | 11.6% | 83 |
| Motorcycle structure and attachments | 5.07 | 5.7% | 41 |
| Motorcycle fuel and exhaust | 4.95 | 5.6% | 40 |
| Motorcycle suspension | 4.08 | 4.6% | 33 |
| Motorcycle body and structure | 3.34 | 3.8% | 27 |
| Motorcycle driving controls | 3.21 | 3.6% | 26 |
| Motorcycle tyres | 1.48 | 1.7% | 12 |
| Motorcycle steering | 1.48 | 1.7% | 12 |
| Motorcycle reg plates and vin | 1.24 | 1.4% | 10 |
| Motorcycle wheels | 1.24 | 1.4% | 10 |
🚗 Similar Cars to Consider
Mileage at MOT
The average Derbi Unclassified has 11,313 miles when tested for MOT.
📊 Mileage-Adjusted Failure Rate
How often this car fails MOT relative to how much it's driven — a fairer comparison than raw pass rate.
The Derbi Unclassified has a mileage-adjusted failure rate of 37.21% per 10,000 miles driven. The average across all makes is 5.38%, so this model is worse than average.
About Derbi Unclassified MOT Data
The Derbi Unclassified is a rare vehicle in the UK, with 715 MOT test results recorded in our database spanning 8 manufacture years. It has an overall MOT pass rate of 57.9% and a failure rate of 42.1%, which is slightly below the UK average of approximately 37%.
For Derbi Unclassified owners, these results suggest average reliability — some preparation before MOT can improve pass chances. Focus your pre-MOT checks on motorcycle lighting and signalling and motorcycle brakes for the best chance of a first-time pass. Use our detailed year-by-year breakdown and failure analysis below to understand how your specific Unclassified is likely to perform.
Motorcycle lighting and signalling — 32.4% of failures
Motorcycle lighting and signalling issues account for 32.4% of MOT failures on the Derbi Unclassified. Motorcycle lighting and signalling issues are a common cause of MOT failure. Regular inspection and maintenance of these components helps ensure your vehicle passes its MOT. Typical repair costs: £100–400. Pre-MOT check: Have this system checked during regular servicing. Look for warning signs like unusual noises, vibrations, or dashboard warning lights.
Motorcycle brakes — 27.0% of failures
Motorcycle brakes issues account for 27.0% of MOT failures on the Derbi Unclassified. Brake-related failures include worn brake pads, corroded brake discs, leaking brake lines, and faulty brake servos. These are safety-critical components — any brake deficiency will result in an MOT fail. Typical repair costs: £150–400. Pre-MOT check: Listen for squealing or grinding noises. Check brake pedal feel — if it feels spongy or goes to the floor, have the system inspected immediately. Look at brake pad thickness through the wheel spokes (minimum 3mm).
Motorcycle steering and suspension — 21.8% of failures
Motorcycle steering and suspension issues account for 21.8% of MOT failures on the Derbi Unclassified. Suspension failures typically involve worn bushes, leaking shock absorbers, broken coil springs, and damaged suspension arms. These affect ride quality, tyre wear, and road holding. Typical repair costs: £200–500. Pre-MOT check: Look for uneven tyre wear, listen for clunking over bumps, and check if the car pulls to one side. A bouncy ride suggests worn shock absorbers. Visually inspect coil springs for cracks.
Frequently Asked Questions
What is the MOT pass rate for the Derbi Unclassified?
Based on 715 MOT tests in our database, the Derbi Unclassified has an overall pass rate of 57.9% (42.1% fail rate).
What are the most common MOT failures on a Derbi Unclassified?
The top 3 reasons a Derbi Unclassified fails its MOT are: 1. Motorcycle lighting and signalling (32.4%), 2. Motorcycle brakes (27.0%), 3. Motorcycle steering and suspension (21.8%). Check these areas before booking your MOT.
Is the Derbi Unclassified reliable?
With a 42.1% MOT failure rate, the Unclassified is about average compared to the UK average of ~40%.
What should I check before an MOT on my Derbi Unclassified?
Based on failure data, focus on: Motorcycle lighting and signalling (32.4%); Motorcycle brakes (27.0%); Motorcycle steering and suspension (21.8%). These are the areas most likely to cause a fail. Also check all lights, tyres (minimum 1.6mm tread), and windscreen condition — these are quick wins that apply to all cars.
Based on DVSA anonymised MOT test data (2005–2024). Crown copyright, Open Government Licence v3.0.