Honda Cb400s MOT Pass Rate
Overall pass rate across all manufacture years, based on 44 real MOT test results. Failure rate: 29.5%.
Data from official DVSA MOT testing records
Honda Cb400s MOT Reliability Overview
The Honda Cb400s is a rare vehicle in the UK, with 44 MOT test results recorded in our database spanning 0 manufacture years. It has an overall MOT pass rate of 70.5% and a failure rate of 29.5%, which is above the UK average of approximately 37%.
Based on this data, the Honda Cb400s earns a "Very Good" reliability rating. The average Honda Cb400s presents for MOT with approximately 42,670 miles on the clock.
The most common MOT failure for the Honda Cb400s is Motorcycle suspension, affecting 43.2% of all tests. 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. The second most common issue is Motorcycle brakes at 25.0%. Motorcycle lighting and signalling rounds out the top three at 11.4%. 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
* 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 Suspension | 43.2% | 19 |
| 2 | Motorcycle Brakes | 25.0% | 11 |
| 3 | Motorcycle Lighting And Signalling | 15.9% | 7 |
| 4 | Motorcycle Lamps And Reflectors | 6.8% | 3 |
| 5 | Motorcycle Structure And Attachments | 6.8% | 3 |
| 6 | Motorcycle Tyres And Wheels | 6.8% | 3 |
| 7 | Non-component Advisories | 6.8% | 3 |
| 8 | Motorcycle Steering And Suspension | 4.5% | 2 |
| 9 | Motorcycle Body And Structure | 2.3% | 1 |
| 10 | Motorcycle Reg Plates And Vin | 2.3% | 1 |
Failures per 10,000 Miles
avg. 42,670 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 suspension | 10.12 | 43.2% | 19 |
| Motorcycle brakes | 5.86 | 25.0% | 11 |
| Motorcycle lighting and signalling | 3.73 | 15.9% | 7 |
| Motorcycle lamps and reflectors | 1.60 | 6.8% | 3 |
| Motorcycle structure and attachments | 1.60 | 6.8% | 3 |
| Motorcycle tyres and wheels | 1.60 | 6.8% | 3 |
| Non-component advisories | 1.60 | 6.8% | 3 |
| Motorcycle steering and suspension | 1.07 | 4.5% | 2 |
| Motorcycle body and structure | 0.53 | 2.3% | 1 |
| Motorcycle reg plates and vin | 0.53 | 2.3% | 1 |
🚗 Similar Cars to Consider
Mileage at MOT
The average Honda Cb400s has 42,670 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 Honda Cb400s has a mileage-adjusted failure rate of 6.91% per 10,000 miles driven. The average across all makes is 5.38%, so this model is worse than average.
About Honda Cb400s MOT Data
The Honda Cb400s is a rare vehicle in the UK, with 44 MOT test results recorded in our database spanning 0 manufacture years. It has an overall MOT pass rate of 70.5% and a failure rate of 29.5%, which is above the UK average of approximately 37%.
For Honda Cb400s owners, these results suggest a reliable vehicle that generally passes its MOT without major issues. Focus your pre-MOT checks on motorcycle suspension and motorcycle brakes 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 Cb400s is likely to perform.
Motorcycle suspension — 43.2% of failures
Motorcycle suspension issues account for 43.2% of MOT failures on the Honda Cb400s. 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 brakes — 25.0% of failures
Motorcycle brakes issues account for 25.0% of MOT failures on the Honda Cb400s. 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).
Motorcycle lighting and signalling — 11.4% of failures
Motorcycle lighting and signalling issues account for 11.4% of MOT failures on the Honda Cb400s. 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.
Frequently Asked Questions
What is the MOT pass rate for the Honda Cb400s?
Based on 44 (based on limited data) MOT tests in our database, the Honda Cb400s has an overall pass rate of 70.5% (29.5% fail rate).
What are the most common MOT failures on a Honda Cb400s?
The top 3 reasons a Honda Cb400s fails its MOT are: 1. Motorcycle suspension (43.2%), 2. Motorcycle brakes (25.0%), 3. Motorcycle lighting and signalling (11.4%). Check these areas before booking your MOT.
Is the Honda Cb400s reliable?
With a 29.5% MOT failure rate, the Cb400s is more reliable than average compared to the UK average of ~40%.
What should I check before an MOT on my Honda Cb400s?
Based on failure data, focus on: Motorcycle suspension (43.2%); Motorcycle brakes (25.0%); Motorcycle lighting and signalling (11.4%). 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.