1978 Yamaha Tt500 MOT Pass Rate
Pass rate for Tt500 models manufactured in 1978, based on 54 real MOT test results.
Data from official DVSA MOT testing records
1978 Yamaha Tt500 MOT Analysis
The 1978 Yamaha Tt500 has an MOT pass rate of 75.9% based on 54 tests — well above the UK average for UK vehicles. Cars of this vintage present for MOT with an average of 3,081 miles on the odometer. With a 24.1% failure rate, the 1978 Tt500 is rated as "Excellent" for MOT reliability.
The leading cause of MOT failure for the 1978 Yamaha Tt500 is Motorcycle lighting and signalling, responsible for 3.7% 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 tyres is the second most common issue at 3.7%. Motorcycle drive system follows at 1.9%.
Top failures specific to 1978 models only. The overall Tt500 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 | 3.7% | 2 |
| 2 | Motorcycle Tyres | 3.7% | 2 |
| 3 | Motorcycle Drive System | 1.9% | 1 |
Mileage Statistics
About This Data
The 1978 Yamaha Tt500 has an MOT pass rate of 75.9% based on 54 tests — well above the UK average for UK vehicles. Cars of this vintage present for MOT with an average of 3,081 miles on the odometer. With a 24.1% failure rate, the 1978 Tt500 is rated as "Excellent" for MOT reliability.
If you own or are considering buying a 1978 Yamaha Tt500, 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 3,081 miles, many of these vehicles are still in good mechanical condition.
Motorcycle lighting and signalling — 3.7% of failures
Motorcycle lighting and signalling issues account for 3.7% of MOT failures on 1978 Yamaha Tt500 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 tyres — 3.7% of failures
Motorcycle tyres issues account for 3.7% of MOT failures on 1978 Yamaha Tt500 models. Tyre failures include tread depth below the legal minimum of 1.6mm, cuts, bulges, exposed cords, and incorrect tyre pressure. Tyres are one of the most common and easiest-to-prevent MOT failures. Typical repair costs: £50–200 per tyre. Pre-MOT check: Check tread depth with a 20p coin — if the outer band is visible, the tyre is too worn. Look for bulges, cuts, or embedded objects. Ensure all tyres match the recommended size and load rating.
Motorcycle drive system — 1.9% of failures
Motorcycle drive system issues account for 1.9% of MOT failures on 1978 Yamaha Tt500 models. Motorcycle drive system 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.