Kawasaki Z400-J3
Real ownership data from 383 UK Z400-J3 motorcycles — mileage, MOT pass rates and the faults that actually come up, taken from DVSA test records rather than opinion.
Most common Z400-J3 problems
Ranked by how often each fault appears in this model's MOT history.
| Fault | Severity | Share of faults |
|---|---|---|
| Suspension | fail | 25% |
| Lights and indicators | major | 25% |
| Brakes | prs | 12.5% |
| Fuel system | user entered | 6.3% |
| Steering and head bearings | prs | 6.3% |
| Fluid leaks | major | 6.3% |
Advisories (wear noted but not failed) are excluded above; the most common is chain and sprockets.
Z400-J3 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 |
|---|---|---|---|---|
| 1984 | 11 | — | — | — |
| 1983 | 148 | 38,603 mi | 576 | 100% |
| 1982 | 210 | 17,908 mi | 532 | 64.71% |
| 1981 | 5 | — | — | — |
Z400-J3 questions, answered with data
What are the most common problems with the Kawasaki Z400-J3?
Across 383 UK examples, the most frequently recorded MOT faults are suspension (25% of all recorded faults), lights and indicators (25% of all recorded faults), brakes (12.5% of all recorded faults).
What is average mileage for a Kawasaki Z400-J3?
The median Kawasaki Z400-J3 in the UK has covered 27,617 miles, and typically rides about 576 miles a year. Half of all examples fall between 7,145 and 32,928 miles.
Is the Kawasaki Z400-J3 reliable?
76% of Kawasaki Z400-J3 MOT tests are passed first time, with an average of 0.57 faults recorded per test. This is measured from DVSA MOT records, not owner opinion.
Based on DVSA MOT test records for 383 Kawasaki Z400-J3 motorcycles registered in Great Britain and Northern Ireland. Contains public sector information licensed under the Open Government Licence v3.0.