BSA C11G
Real ownership data from 117 UK C11G motorcycles — mileage, MOT pass rates and the faults that actually come up, taken from DVSA test records rather than opinion.
Most common C11G problems
Ranked by how often each fault appears in this model's MOT history.
| Fault | Severity | Share of faults |
|---|---|---|
| Brakes | fail | 8.9% |
| Lights and indicators | fail | 6.1% |
| Other | fail | 5.6% |
| Tyres | fail | 5% |
| Chain and sprockets | fail | 3.9% |
| Suspension | fail | 2.8% |
| Steering and head bearings | fail | 2.8% |
| Wheels | fail | 2.8% |
Advisories (wear noted but not failed) are excluded above; the most common is suspension.
C11G 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 |
|---|---|---|---|---|
| 1957 | 7 | 14,451 mi | 500 | 95.83% |
| 1955 | 43 | 11,643 mi | 156 | 91.87% |
| 1954 | 16 | 8,804 mi | 142 | 91.84% |
C11G questions, answered with data
What are the most common problems with the BSA C11G?
Across 117 UK examples, the most frequently recorded MOT faults are brakes (8.9% of all recorded faults), lights and indicators (6.1% of all recorded faults), other (5.6% of all recorded faults).
What is average mileage for a BSA C11G?
The median BSA C11G in the UK has covered 7,367 miles, and typically rides about 102 miles a year. Half of all examples fall between 431 and 27,860 miles.
Is the BSA C11G reliable?
90.23% of BSA C11G MOT tests are passed first time, with an average of 0.56 faults recorded per test. This is measured from DVSA MOT records, not owner opinion.
Based on DVSA MOT test records for 117 BSA C11G motorcycles registered in Great Britain and Northern Ireland. Contains public sector information licensed under the Open Government Licence v3.0.