1979 Yamaha Xs400 MOT Pass Rate
Pass rate for Xs400 models manufactured in 1979, based on 46 real MOT test results.
Data from official DVSA MOT testing records
1979 Yamaha Xs400 MOT Analysis
The 1979 Yamaha Xs400 has an MOT pass rate of 80.4% based on 46 tests — well above the UK average for UK vehicles. Cars of this vintage present for MOT with an average of 22,130 miles on the odometer. With a 19.6% failure rate, the 1979 Xs400 is rated as "Excellent" for MOT reliability.
The leading cause of MOT failure for the 1979 Yamaha Xs400 is Motorcycle lighting and signalling, responsible for 4.3% of failures. 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 range from £100–400. Motorcycle driving controls is the second most common issue at 2.2%. Motorcycle fuel and exhaust follows at 2.2%.
Top failures specific to 1979 models only. The overall Xs400 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 | Motorcycle Lighting And Signalling | 4.3% | 2 |
| 2 | Motorcycle Driving Controls | 2.2% | 1 |
| 3 | Motorcycle Fuel And Exhaust | 2.2% | 1 |
Failures per 10,000 Miles
avg. 22,130 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.
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| Category | Rate / 10K mi | Raw % | Count |
|---|---|---|---|
| Motorcycle lighting and signalling | 1.96 | 4.3% | 2 |
| Motorcycle driving controls | 0.98 | 2.2% | 1 |
| Motorcycle fuel and exhaust | 0.98 | 2.2% | 1 |
Mileage Statistics
Mileage-adjusted failure rate — accounts for how much this model year is typically driven.
About This Data
The 1979 Yamaha Xs400 has an MOT pass rate of 80.4% based on 46 tests — well above the UK average for UK vehicles. Cars of this vintage present for MOT with an average of 22,130 miles on the odometer. With a 19.6% failure rate, the 1979 Xs400 is rated as "Excellent" for MOT reliability.
If you own or are considering buying a 1979 Yamaha Xs400, you can expect reliable MOT performance overall. Before your MOT, pay particular attention to motorcycle lighting and signalling: Have this system checked during regular servicing. Look for warning signs like unusual noises, vibrations, or dashboard warning lights. With relatively low average mileage of 22,130 miles, many of these vehicles are still in good mechanical condition.
Motorcycle lighting and signalling — 4.3% of failures
Motorcycle lighting and signalling issues account for 4.3% of MOT failures on 1979 Yamaha Xs400 models. 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 driving controls — 2.2% of failures
Motorcycle driving controls issues account for 2.2% of MOT failures on 1979 Yamaha Xs400 models. Motorcycle driving controls 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 fuel and exhaust — 2.2% of failures
Motorcycle fuel and exhaust issues account for 2.2% of MOT failures on 1979 Yamaha Xs400 models. Motorcycle fuel and exhaust 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.
Based on DVSA anonymised MOT test data (2005–2024). Crown copyright, Open Government Licence v3.0.