1978 Yamaha Xs650 MOT Pass Rate
Pass rate for Xs650 models manufactured in 1978, based on 460 real MOT test results.
Data from official DVSA MOT testing records
This page shows all Xs650 cars tested in 1978. Want to see how cars built in 1978 hold up over time?
View 1978 Yamaha Xs650 vintage page → (74.2% current pass rate)1978 Yamaha Xs650 MOT Analysis
The 1978 Yamaha Xs650 has an MOT pass rate of 84.6% based on 460 tests — well above the UK average for UK vehicles. Cars of this vintage present for MOT with an average of 20,313 miles on the odometer. With a 15.4% failure rate, the 1978 Xs650 is rated as "Excellent" for MOT reliability.
The leading cause of MOT failure for the 1978 Yamaha Xs650 is Motorcycle lamps and reflectors, responsible for 0.4% of failures. Lighting failures cover all external lights: headlights, tail lights, brake lights, indicators, fog lights, and reflectors. A single blown bulb will cause an MOT fail. This is one of the most preventable failure categories. Typical repair costs range from £5–50. Motorcycle wheels is the second most common issue at 0.4%. Motorcycle steering follows at 0.2%.
Top failures specific to 1978 models only. The overall Xs650 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 Lamps And Reflectors | 0.4% | 2 |
| 2 | Motorcycle Wheels | 0.4% | 2 |
| 3 | Motorcycle Steering | 0.2% | 1 |
| 4 | Motorcycle Audible Warning (Horn) | 0.2% | 1 |
| 5 | Motorcycle Brakes | 0.2% | 1 |
Failures per 10,000 Miles
avg. 20,313 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 lamps and reflectors | 0.21 | 0.4% | 2 |
| Motorcycle wheels | 0.21 | 0.4% | 2 |
| Motorcycle steering | 0.11 | 0.2% | 1 |
| Motorcycle audible warning (Horn) | 0.11 | 0.2% | 1 |
| Motorcycle brakes | 0.11 | 0.2% | 1 |
Mileage Statistics
Mileage-adjusted failure rate — accounts for how much this model year is typically driven.
About This Data
The 1978 Yamaha Xs650 has an MOT pass rate of 84.6% based on 460 tests — well above the UK average for UK vehicles. Cars of this vintage present for MOT with an average of 20,313 miles on the odometer. With a 15.4% failure rate, the 1978 Xs650 is rated as "Excellent" for MOT reliability.
If you own or are considering buying a 1978 Yamaha Xs650, you can expect reliable MOT performance overall. Before your MOT, pay particular attention to motorcycle lamps and reflectors: Walk around the car and check every light — headlights (dipped and main beam), side lights, tail lights, brake lights, indicators, hazard lights, reverse light, rear fog light, and number plate lights. Replace any blown bulbs before the test. With relatively low average mileage of 20,313 miles, many of these vehicles are still in good mechanical condition.
Motorcycle lamps and reflectors — 0.4% of failures
Motorcycle lamps and reflectors issues account for 0.4% of MOT failures on 1978 Yamaha Xs650 models. Lighting failures cover all external lights: headlights, tail lights, brake lights, indicators, fog lights, and reflectors. A single blown bulb will cause an MOT fail. This is one of the most preventable failure categories. Typical repair costs: £5–50. Pre-MOT check: Walk around the car and check every light — headlights (dipped and main beam), side lights, tail lights, brake lights, indicators, hazard lights, reverse light, rear fog light, and number plate lights. Replace any blown bulbs before the test.
Motorcycle wheels — 0.4% of failures
Motorcycle wheels issues account for 0.4% of MOT failures on 1978 Yamaha Xs650 models. Wheel failures include cracked or severely corroded alloy wheels, missing or loose wheel nuts, and wheels that are insecurely attached. These are safety-critical and relatively rare compared to tyre failures. Typical repair costs: £100–400 per wheel. Pre-MOT check: Visually inspect wheels for cracks, especially around the spokes and rim. Check that all wheel nuts are present and tightened. Look for signs of impact damage on alloy wheels.
Motorcycle steering — 0.2% of failures
Motorcycle steering issues account for 0.2% of MOT failures on 1978 Yamaha Xs650 models. Steering failures include excessive play in the steering wheel, leaking power steering fluid, worn track rod ends, and damaged steering rack. These affect vehicle control and are closely related to suspension wear. Typical repair costs: £150–600. Pre-MOT check: Check for excessive steering wheel play (more than a few inches of free movement). Listen for whining from the power steering pump. Look for fluid leaks under the car near the front wheels.
Based on DVSA anonymised MOT test data (2005–2024). Crown copyright, Open Government Licence v3.0.