1984 Harley Davidson Unclassified MOT Pass Rate
Pass rate for Unclassified models manufactured in 1984, based on 366 real MOT test results.
Data from official DVSA MOT testing records
1984 Harley Davidson Unclassified MOT Analysis
The 1984 Harley Davidson Unclassified has an MOT pass rate of 85.0% based on 366 tests — well above the UK average for UK vehicles. Cars of this vintage present for MOT with an average of 18,443 miles on the odometer. With a 15.0% failure rate, the 1984 Unclassified is rated as "Excellent" for MOT reliability.
The leading cause of MOT failure for the 1984 Harley Davidson Unclassified is Identification of the vehicle, responsible for 0.8% of failures. Identification failures relate to the Vehicle Identification Number (VIN) and registration plate. The VIN must be permanently displayed and legible, and the registration plate must meet British Standard formatting. Typical repair costs range from £10–50. Motorcycle audible warning (Horn) is the second most common issue at 0.8%. Motorcycle brakes follows at 0.8%.
Top failures specific to 1984 models only. The overall Unclassified page may show different rankings.
What Fails Most
What Fails on This Car?
Click a category to see specific failure items.
View as table
| Rank | Failure Category | Rate (%) | Count |
|---|---|---|---|
| 1 | Identification Of The Vehicle | 0.8% | 3 |
| 2 | Motorcycle Audible Warning (Horn) | 0.8% | 3 |
| 3 | Motorcycle Brakes | 0.8% | 3 |
| 4 | Motorcycle Lamps And Reflectors | 0.8% | 3 |
| 5 | Motorcycle Structure And Attachments | 0.8% | 3 |
Failures per 10,000 Miles
avg. 18,443 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 |
|---|---|---|---|
| Identification of the vehicle | 0.44 | 0.8% | 3 |
| Motorcycle audible warning (Horn) | 0.44 | 0.8% | 3 |
| Motorcycle brakes | 0.44 | 0.8% | 3 |
| Motorcycle lamps and reflectors | 0.44 | 0.8% | 3 |
| Motorcycle structure and attachments | 0.44 | 0.8% | 3 |
Mileage Statistics
Mileage-adjusted failure rate — accounts for how much this model year is typically driven.
About This Data
The 1984 Harley Davidson Unclassified has an MOT pass rate of 85.0% based on 366 tests — well above the UK average for UK vehicles. Cars of this vintage present for MOT with an average of 18,443 miles on the odometer. With a 15.0% failure rate, the 1984 Unclassified is rated as "Excellent" for MOT reliability.
If you own or are considering buying a 1984 Harley Davidson Unclassified, you can expect reliable MOT performance overall. Before your MOT, pay particular attention to identification of the vehicle: Ensure the VIN plate is visible and legible (usually in the windscreen or under the bonnet). Check that number plates are clean, undamaged, and use the correct font and spacing. With relatively low average mileage of 18,443 miles, many of these vehicles are still in good mechanical condition.
Identification of the vehicle — 0.8% of failures
Identification of the vehicle issues account for 0.8% of MOT failures on 1984 Harley Davidson Unclassified models. Identification failures relate to the Vehicle Identification Number (VIN) and registration plate. The VIN must be permanently displayed and legible, and the registration plate must meet British Standard formatting. Typical repair costs: £10–50. Pre-MOT check: Ensure the VIN plate is visible and legible (usually in the windscreen or under the bonnet). Check that number plates are clean, undamaged, and use the correct font and spacing.
Motorcycle audible warning (Horn) — 0.8% of failures
Motorcycle audible warning (Horn) issues account for 0.8% of MOT failures on 1984 Harley Davidson Unclassified models. Motorcycle audible warning (Horn) 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 — 0.8% of failures
Motorcycle brakes issues account for 0.8% of MOT failures on 1984 Harley Davidson Unclassified models. 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).
Based on DVSA anonymised MOT test data (2005–2024). Crown copyright, Open Government Licence v3.0.