MOT History from tests of petrol BSA B25s year 1970

Review the list of common BSA B25 failures below or to perform a specific mot history check on your BSA then use our popular KnowYourCar service

mot history

Pass percent:90.73%

(The average a petrol BSA B25 year 1970 passes without issue)

Based on:248 MOT Tests

Most common failures	No# failures
Headlamp aim out of alignment	6
Steering headbearing has excessive free play \|2.2.2\|	2
Stop lamp does not illuminate immediately a brake applies \|1.3.1a\|	2
Rear position lamp does not illuminate immediately when it is switched on \|1.1.3a\|	2
Front Headlamp at least one does not illuminate on dipped beam \|1.2.2a\|i\|\|	2
Rear Stop lamp does not illuminate immediately a brake applies \|1.3.1a\|	2
Front suspension assembly component loose \|2.3.1\|	1
Throttle has a significant change in engine speed whilst moving the steering from lock to lock \|2.1.4\|	1
Headlamp at least one does not illuminate on main beam \|1.2.2a\|ii\|\|	1
Rear suspension component loose \|2.4.A.1a\|	1
Front Headlamp at least one does not illuminate on main beam \|1.2.2a\|ii\|\|	1
Rear Stop lamp insecure \|1.3.3b\|	1
Front Horn not working \|1.7.3a\|	1
Front Dipswitch does not extinquish main beam/s, leaving at least 1 dipped beam headlamp \|1.2.2b\|i\|\|	1
Front wheel bearings are excessively rough \|2.3.5b\|	1
Throttle operating incorrectly \|6.2.1f\|	1
Offside Front Direction indicator not working \|1.5.1c\|	1
Riders seat insecure \|6.2.1a\|	1
Front shock absorber seal failed and leaking oil \|2.3.3\|	1
Headlamp aim beam image kick up to the offside \|1.6\|	1
Nearside Handlebar handgrip not secure to handlebars. \|2.1.1c\|	1
Brake lever attachment screws loose \|3.1.2b\|	1
Fuel pipe union leaking \|7.2.1a\|	1

We get to these numbers by trawling through over 1 billion MOT test results since 2004 and crunched the numbers. We remove anything to do with Tyres, as they are model independent and group together common non-model specific issues. We are trying to get to a picture of what models have what issues.

Please note: We take the data from the DVSA. This data is raw and can contain typos and spelling mistakes that garages may have entered while recording a MOT result. Specifically miss-match on names of models and makes. We are constantly cleaning the data so bear with the odd issue.

Got suggestions? We’re improving this section all the time. If you have any suggestions, please let us know.

Most common failures	No# failures
Headlamp aim out of alignment	6
Steering headbearing has excessive free play \|2.2.2\|	2
Stop lamp does not illuminate immediately a brake applies \|1.3.1a\|	2
Rear position lamp does not illuminate immediately when it is switched on \|1.1.3a\|	2
Front Headlamp at least one does not illuminate on dipped beam \|1.2.2a\|i\|\|	2
Rear Stop lamp does not illuminate immediately a brake applies \|1.3.1a\|	2
Front suspension assembly component loose \|2.3.1\|	1
Throttle has a significant change in engine speed whilst moving the steering from lock to lock \|2.1.4\|	1
Headlamp at least one does not illuminate on main beam \|1.2.2a\|ii\|\|	1
Rear suspension component loose \|2.4.A.1a\|	1
Front Headlamp at least one does not illuminate on main beam \|1.2.2a\|ii\|\|	1
Rear Stop lamp insecure \|1.3.3b\|	1
Front Horn not working \|1.7.3a\|	1
Front Dipswitch does not extinquish main beam/s, leaving at least 1 dipped beam headlamp \|1.2.2b\|i\|\|	1
Front wheel bearings are excessively rough \|2.3.5b\|	1
Throttle operating incorrectly \|6.2.1f\|	1
Offside Front Direction indicator not working \|1.5.1c\|	1
Riders seat insecure \|6.2.1a\|	1
Front shock absorber seal failed and leaking oil \|2.3.3\|	1
Headlamp aim beam image kick up to the offside \|1.6\|	1
Nearside Handlebar handgrip not secure to handlebars. \|2.1.1c\|	1
Brake lever attachment screws loose \|3.1.2b\|	1
Fuel pipe union leaking \|7.2.1a\|	1

MOT History from tests of petrol BSA B25s year 1970

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