BSA M33
Real ownership data from 68 UK M33 motorcycles — mileage, MOT pass rates and the faults that actually come up, taken from DVSA test records rather than opinion.
Most common M33 problems
Ranked by how often each fault appears in this model's MOT history.
| Fault | Severity | Share of faults |
|---|---|---|
| Other | user entered | 10.2% |
| Lights and indicators | fail | 8.5% |
| Suspension | fail | 6.8% |
| Fluid leaks | user entered | 5.9% |
| Controls and cables | prs | 5.1% |
| Steering and head bearings | fail | 4.2% |
| Brakes | fail | 4.2% |
| Chain and sprockets | fail | 3.4% |
Advisories (wear noted but not failed) are excluded above; the most common is suspension.
M33 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 |
|---|---|---|---|---|
| 1956 | 6 | 12,320 mi | 1,168 | 93.33% |
| 1955 | 5 | 13,007 mi | 17 | 75% |
| 1953 | 7 | 9,282 mi | 224 | 96.77% |
| 1952 | 8 | 14,898 mi | 396 | 100% |
M33 questions, answered with data
What are the most common problems with the BSA M33?
Across 68 UK examples, the most frequently recorded MOT faults are other (10.2% of all recorded faults), lights and indicators (8.5% of all recorded faults), suspension (6.8% of all recorded faults).
What is average mileage for a BSA M33?
The median BSA M33 in the UK has covered 9,282 miles, and typically rides about 183 miles a year. Half of all examples fall between 1,667 and 25,080 miles.
Is the BSA M33 reliable?
93.03% of BSA M33 MOT tests are passed first time, with an average of 0.46 faults recorded per test. This is measured from DVSA MOT records, not owner opinion.
Based on DVSA MOT test records for 68 BSA M33 motorcycles registered in Great Britain and Northern Ireland. Contains public sector information licensed under the Open Government Licence v3.0.