Honda CB400N
Real ownership data from 1,120 UK CB400N motorcycles — mileage, MOT pass rates and the faults that actually come up, taken from DVSA test records rather than opinion.
Most common CB400N problems
Ranked by how often each fault appears in this model's MOT history.
| Fault | Severity | Share of faults |
|---|---|---|
| Brakes | minor | 19.5% |
| Steering and head bearings | major | 6.8% |
| Fluid leaks | fail | 6.4% |
| Chain and sprockets | major | 6% |
| Other | fail | 5.9% |
| Suspension | major | 5.5% |
| Electrical | major | 5.4% |
| Controls and cables | user entered | 5.2% |
Advisories (wear noted but not failed) are excluded above; the most common is lights and indicators.
CB400N mileage and reliability by year
Use this to judge whether a specific bike is high or low mileage for its age.
| YearYear | MedianMedian mileage | Mi/yrMiles/year | MOT passFirst-time pass | |
|---|---|---|---|---|
| 2018 | 5 | 15,015 mi | 534 | 100% |
| 2004 | 6 | 24,787 mi | 1,134 | 87.1% |
| 2002 | 11 | 19,986 mi | 120 | 81.93% |
| 2001 | 5 | 34,216 mi | — | 64.29% |
| 2000 | 6 | 28,921 mi | 1,057 | 79.17% |
| 1999 | 14 | 32,963 mi | 1,550 | 62.22% |
| 1998 | 11 | 17,577 mi | 427 | 86.15% |
| 1997 | 21 | 35,790 mi | 1,124 | 77.53% |
| 1996 | 6 | 37,166 mi | 124 | 65.38% |
| 1994 | 9 | 38,233 mi | 55 | 81.08% |
| 1993 | 9 | 36,772 mi | 4,374 | 81.13% |
| 1992 | 5 | 35,854 mi | 673 | 90% |
| 1990 | 9 | 28,276 mi | 1,594 | 79.59% |
| 1989 | 5 | 38,186 mi | 6,561 | 75% |
| 1986 | 5 | 28,558 mi | 1,266 | 80% |
| 1985 | 18 | 30,804 mi | 733 | 74.49% |
| 1984 | 66 | 30,245 mi | 250 | 80.99% |
| 1983 | 116 | 34,541 mi | 295 | 81.3% |
| 1982 | 124 | 36,508 mi | 317 | 74.87% |
| 1981 | 145 | 31,876 mi | 274 | 75.64% |
CB400N questions, answered with data
What are the most common problems with the Honda CB400N?
Across 1,120 UK examples, the most frequently recorded MOT faults are brakes (19.5% of all recorded faults), steering and head bearings (6.8% of all recorded faults), fluid leaks (6.4% of all recorded faults).
What is average mileage for a Honda CB400N?
The median Honda CB400N in the UK has covered 29,878 miles, and typically rides about 322 miles a year. Half of all examples fall between 18,952 and 40,963 miles.
Is the Honda CB400N reliable?
78.59% of Honda CB400N MOT tests are passed first time, with an average of 0.15 faults recorded per test. This is measured from DVSA MOT records, not owner opinion.
Based on DVSA MOT test records for 1,120 Honda CB400N motorcycles registered in Great Britain and Northern Ireland. Contains public sector information licensed under the Open Government Licence v3.0.