BSA C11

Real ownership data from 163 UK C11 motorcycles — mileage, MOT pass rates and the faults that actually come up, taken from DVSA test records rather than opinion.

UK examples

163

Median mileage

10,410 mi

Miles per year

MOT first-time pass

87.36%

Most common C11 problems

Ranked by how often each fault appears in this model's MOT history.

Fault	Severity	Share of faults
Lights and indicators	fail	10.5%
Brakes	fail	8.9%
Tyres	fail	6.3%
Other	fail	6%
Suspension	fail	5.4%
Electrical	fail	4.8%
Steering and head bearings	fail	2.5%
Wheels	fail	2.2%

Advisories (wear noted but not failed) are excluded above; the most common is suspension.

C11 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
1955	6	27,105 mi	69	100%
1953	22	10,198 mi	34	86.27%
1952	11	26,120 mi	216	73.91%
1951	8	10,610 mi	227	89.29%
1950	9	14,862 mi	16	86.36%
1949	9	1,433 mi	138	81.48%
1948	8	18,642 mi	307	95.24%
1947	6	19,724 mi	47	95%
1946	13	4,013 mi	172	86.21%

C11 questions, answered with data

What are the most common problems with the BSA C11?

Across 163 UK examples, the most frequently recorded MOT faults are lights and indicators (10.5% of all recorded faults), brakes (8.9% of all recorded faults), tyres (6.3% of all recorded faults).

What is average mileage for a BSA C11?

The median BSA C11 in the UK has covered 10,410 miles, and typically rides about 66 miles a year. Half of all examples fall between 1,203 and 28,704 miles.

Is the BSA C11 reliable?

87.36% of BSA C11 MOT tests are passed first time, with an average of 0.64 faults recorded per test. This is measured from DVSA MOT records, not owner opinion.

Based on DVSA MOT test records for 163 BSA C11 motorcycles registered in Great Britain and Northern Ireland. Contains public sector information licensed under the Open Government Licence v3.0.