Yamaha 400
Real ownership data from 64 UK 400 motorcycles — mileage, MOT pass rates and the faults that actually come up, taken from DVSA test records rather than opinion.
Most common 400 problems
Ranked by how often each fault appears in this model's MOT history.
| Fault | Severity | Share of faults |
|---|---|---|
| Lights and indicators | major | 15.6% |
| Other | fail | 10.6% |
| Brakes | dangerous | 6.4% |
| Suspension | fail | 4.2% |
| Steering and head bearings | fail | 4.2% |
| Tyres | fail | 2.9% |
| Brake discs and pads | fail | 1.9% |
| Chain and sprockets | fail | 1.9% |
Advisories (wear noted but not failed) are excluded above; the most common is suspension.
400 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 | 6 | 32,600 mi | 5,182 | 88.24% |
| 1979 | 5 | 17,559 mi | 232 | 90% |
400 questions, answered with data
What are the most common problems with the Yamaha 400?
Across 64 UK examples, the most frequently recorded MOT faults are lights and indicators (15.6% of all recorded faults), other (10.6% of all recorded faults), brakes (6.4% of all recorded faults).
What is average mileage for a Yamaha 400?
The median Yamaha 400 in the UK has covered 24,208 miles, and typically rides about 191 miles a year. Half of all examples fall between 8,641 and 34,637 miles.
Is the Yamaha 400 reliable?
73.37% of Yamaha 400 MOT tests are passed first time, with an average of 1.36 faults recorded per test. This is measured from DVSA MOT records, not owner opinion.
Based on DVSA MOT test records for 64 Yamaha 400 motorcycles registered in Great Britain and Northern Ireland. Contains public sector information licensed under the Open Government Licence v3.0.