BSA WM20
Real ownership data from 58 UK WM20 motorcycles — mileage, MOT pass rates and the faults that actually come up, taken from DVSA test records rather than opinion.
Most common WM20 problems
Ranked by how often each fault appears in this model's MOT history.
| Fault | Severity | Share of faults |
|---|---|---|
| Other | fail | 18.8% |
| Lights and indicators | fail | 11.8% |
| Tyres | fail | 8.2% |
| Brakes | fail | 4.7% |
| Controls and cables | fail | 3.5% |
| Suspension | fail | 2.4% |
| Frame and structure | user entered | 2.4% |
| Electrical | prs | 2.4% |
Advisories (wear noted but not failed) are excluded above; the most common is suspension.
WM20 questions, answered with data
What are the most common problems with the BSA WM20?
Across 58 UK examples, the most frequently recorded MOT faults are other (18.8% of all recorded faults), lights and indicators (11.8% of all recorded faults), tyres (8.2% of all recorded faults).
What is average mileage for a BSA WM20?
The median BSA WM20 in the UK has covered 6,727 miles, and typically rides about 107 miles a year. Half of all examples fall between 619 and 14,324 miles.
Is the BSA WM20 reliable?
92.92% of BSA WM20 MOT tests are passed first time, with an average of 0.35 faults recorded per test. This is measured from DVSA MOT records, not owner opinion.
Based on DVSA MOT test records for 58 BSA WM20 motorcycles registered in Great Britain and Northern Ireland. Contains public sector information licensed under the Open Government Licence v3.0.