Honda CB400 FOUR
Real ownership data from 137 UK CB400 FOUR motorcycles — mileage, MOT pass rates and the faults that actually come up, taken from DVSA test records rather than opinion.
Most common CB400 FOUR problems
Ranked by how often each fault appears in this model's MOT history.
| Fault | Severity | Share of faults |
|---|---|---|
| Lights and indicators | fail | 11.8% |
| Brakes | fail | 8.5% |
| Tyres | fail | 3.6% |
| Electrical | major | 3.3% |
| Other | fail | 2.6% |
| Suspension | fail | 2% |
| Fluid leaks | fail | 1.7% |
| Controls and cables | fail | 1.7% |
Advisories (wear noted but not failed) are excluded above; the most common is suspension.
CB400 FOUR mileage and reliability by year
Use this to judge whether a specific bike is high or low mileage for its age.
| Year | Examples | Median mileage | Miles/year | First-time pass |
|---|---|---|---|---|
| 1997 | 5 | 17,444 mi | 644 | 85.71% |
| 1979 | 6 | 27,002 mi | 119 | 68.18% |
| 1978 | 24 | 28,518 mi | 277 | 82.41% |
| 1977 | 37 | 33,276 mi | 158 | 85.51% |
| 1976 | 41 | 33,209 mi | 170 | 84.26% |
| 1975 | 13 | 26,940 mi | 318 | 81.48% |
CB400 FOUR questions, answered with data
What are the most common problems with the Honda CB400 FOUR?
Across 137 UK examples, the most frequently recorded MOT faults are lights and indicators (11.8% of all recorded faults), brakes (8.5% of all recorded faults), tyres (3.6% of all recorded faults).
What is average mileage for a Honda CB400 FOUR?
The median Honda CB400 FOUR in the UK has covered 29,805 miles, and typically rides about 199 miles a year. Half of all examples fall between 17,104 and 40,717 miles.
Is the Honda CB400 FOUR reliable?
82.99% of Honda CB400 FOUR MOT tests are passed first time, with an average of 0.8 faults recorded per test. This is measured from DVSA MOT records, not owner opinion.
Based on DVSA MOT test records for 137 Honda CB400 FOUR motorcycles registered in Great Britain and Northern Ireland. Contains public sector information licensed under the Open Government Licence v3.0.