Yamaha Yb100 MOT Pass Rate
Overall pass rate across all manufacture years, based on 1,667 real MOT test results. Failure rate: 25.4%.
Data from official DVSA MOT testing records
Yamaha Yb100 MOT Reliability Overview
The Yamaha Yb100 is a niche vehicle in the UK, with 1,667 MOT test results recorded in our database spanning 17 manufacture years. It has an overall MOT pass rate of 74.6% and a failure rate of 25.4%, which is above the UK average of approximately 37%.
Based on this data, the Yamaha Yb100 earns a "Very Good" reliability rating. The average Yamaha Yb100 presents for MOT with approximately 17,221 miles on the clock. Manufacture year matters: 1976 models achieve the highest pass rate at 90.9%, while 1988 models have the lowest at 65.4%. This 25.5 percentage point difference suggests notable variation in build quality or component durability across production years.
The most common MOT failure for the Yamaha Yb100 is Motorcycle lighting and signalling, affecting 24.3% 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 steering and suspension at 13.7%. Motorcycle tyres and wheels rounds out the top three at 8.0%. 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 | 36.1% | 601 |
| 2 | Motorcycle Steering And Suspension | 18.4% | 307 |
| 3 | Motorcycle Tyres And Wheels | 10.1% | 169 |
| 4 | Motorcycle Brakes | 6.5% | 109 |
| 5 | Motorcycle Drive System | 4.1% | 68 |
| 6 | Motorcycle Lamps And Reflectors | 4.0% | 66 |
| 7 | Motorcycle Fuel And Exhaust | 3.3% | 55 |
| 8 | Motorcycle Body And Structure | 1.7% | 28 |
| 9 | Motorcycle Structure And Attachments | 1.2% | 20 |
| 10 | Motorcycle Reg Plates And Vin | 1.1% | 18 |
| 11 | Motorcycle Driving Controls | 1.0% | 17 |
| 12 | Motorcycle Wheels | 0.9% | 15 |
| 13 | Motorcycle Suspension | 0.9% | 15 |
| 14 | Motorcycle Steering | 0.6% | 10 |
| 15 | Motorcycle Audible Warning (Horn) | 0.5% | 9 |
Failures per 10,000 Miles
avg. 17,221 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 | 20.94 | 36.1% | 601 |
| Motorcycle steering and suspension | 10.69 | 18.4% | 307 |
| Motorcycle tyres and wheels | 5.89 | 10.1% | 169 |
| Motorcycle brakes | 3.80 | 6.5% | 109 |
| Motorcycle drive system | 2.37 | 4.1% | 68 |
| Motorcycle lamps and reflectors | 2.30 | 4.0% | 66 |
| Motorcycle fuel and exhaust | 1.92 | 3.3% | 55 |
| Motorcycle body and structure | 0.98 | 1.7% | 28 |
| Motorcycle structure and attachments | 0.70 | 1.2% | 20 |
| Motorcycle reg plates and vin | 0.63 | 1.1% | 18 |
| Motorcycle driving controls | 0.59 | 1.0% | 17 |
| Motorcycle wheels | 0.52 | 0.9% | 15 |
| Motorcycle suspension | 0.52 | 0.9% | 15 |
| Motorcycle steering | 0.35 | 0.6% | 10 |
| Motorcycle audible warning (Horn) | 0.31 | 0.5% | 9 |
🚗 Similar Cars to Consider
Mileage at MOT
The average Yamaha Yb100 has 17,221 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 Yamaha Yb100 has a mileage-adjusted failure rate of 14.75% per 10,000 miles driven. The average across all makes is 5.38%, so this model is worse than average.
About Yamaha Yb100 MOT Data
The Yamaha Yb100 is a niche vehicle in the UK, with 1,667 MOT test results recorded in our database spanning 17 manufacture years. It has an overall MOT pass rate of 74.6% and a failure rate of 25.4%, which is above the UK average of approximately 37%.
For Yamaha Yb100 owners, these results suggest a reliable vehicle that generally passes its MOT without major issues. Focus your pre-MOT checks on motorcycle lighting and signalling and motorcycle steering and suspension 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 Yb100 is likely to perform.
Motorcycle lighting and signalling — 24.3% of failures
Motorcycle lighting and signalling issues account for 24.3% of MOT failures on the Yamaha Yb100. 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 steering and suspension — 13.7% of failures
Motorcycle steering and suspension issues account for 13.7% of MOT failures on the Yamaha Yb100. 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.
Motorcycle tyres and wheels — 8.0% of failures
Motorcycle tyres and wheels issues account for 8.0% of MOT failures on the Yamaha Yb100. 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.
Frequently Asked Questions
What is the MOT pass rate for the Yamaha Yb100?
Based on 1,667 MOT tests in our database, the Yamaha Yb100 has an overall pass rate of 74.6% (25.4% fail rate).
What are the most common MOT failures on a Yamaha Yb100?
The top 3 reasons a Yamaha Yb100 fails its MOT are: 1. Motorcycle lighting and signalling (24.3%), 2. Motorcycle steering and suspension (13.7%), 3. Motorcycle tyres and wheels (8.0%). Check these areas before booking your MOT.
Is the Yamaha Yb100 reliable?
With a 25.4% MOT failure rate, the Yb100 is more reliable than average compared to the UK average of ~40%.
What should I check before an MOT on my Yamaha Yb100?
Based on failure data, focus on: Motorcycle lighting and signalling (24.3%); Motorcycle steering and suspension (13.7%); Motorcycle tyres and wheels (8.0%). 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.