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MOT History from tests of petrol BSA C15s year 1971

Review the list of common BSA C15 failures below or to perform a specific mot history check on your BSA then use our popular KnowYourCar service

mot history
Pass percent:90.24%
(The average a petrol BSA C15 year 1971 passes without issue)
Based on:338 MOT Tests
Most common failuresNo# failures
Steering headbearing has excessive free play |2.2.2|6
Roller brake test The less effective brake control does not achieve an efficiency of 25%. |3.3.A2b|3
Stop lamp does not illuminate immediately a brake applies |1.3.1a|3
Front Headlamp at least one does not illuminate on dipped beam |1.2.2a|i||3
Throttle has a significant change in engine speed whilst moving the steering from lock to lock |2.1.4|2
Throttle operating incorrectly |6.2.1f|2
Stop lamp remains on when the brake is released |1.3.1e|2
Drive chain excessively tight |6.2.1d|2
Front shock absorber seal failed and leaking oil |2.3.3|1
Headlamp at least one does not illuminate on dipped beam |1.2.2a|i||1
Front wheel bearings have excessive free play |2.3.5b|1
Front wheel bearings are excessively rough |2.3.5b|1
Wheel alignment incorrect which adversely affects the handling |2.5.1|1
Offside Rear Footrest missing |6.2.1a|1
Fuel cap sealing washer deteriorated |7.2.2c|1
Front suspension has inadequate damping effect. |2.3.6c|1
Rear Stop lamp remains on when the brake is released |1.3.1e|1
Horn missing |1.7.1|1
Rear Rear shock absorber has inadequate damping effect. |2.4.A.3b|1
Rear Brake component defective due to a deliberate modification which significantly reduces the original strength rear brake arm |3.1.5|1
Headlamp aim out of alignment1
Front position lamp does not illuminate immediately when switched on |1.1.3a|1
Rear position lamp does not illuminate immediately when it is switched on |1.1.3a|1
Horn not loud enough to be heard by another road user |1.7.3a|1
Nearside Rear Lower Motorcycle structure cracked |6.1.1a|1
Horn not working |1.7.3a|1
Front Brake cable badly frayed |3.2.A1b|1
Inner Front Upper Brake cable excessively corroded |3.2.A1b|1
Offside Front Lower Brake back plate|s| securing bolt|s| loose |3.2.A1j|1
Front Steering movement excessively `notchy` with the weight on the lower bearing |2.2.1a|1
Drive chain worn to excess |6.2.1e|1
Rear Drive chain sprocket worn to excess |6.2.1e|1
Rear Brake reaction bracket insecure |3.2.A1j|1
Locking device|s| not correctly fitted which may make the motor bicycle dangerous to ride link incorrectly fitted |6.2.1h|1
Wheel alignment incorrect which adversely affects the steering |2.5.1|1
Floor brake test The less effective brake control does not achieve an efficiency of 25%. |3.3.C1b|1
Rear Wheel spoke excessively loose |4.2.1b|1
Rear Stop lamp does not illuminate immediately a brake applies |1.3.1a|1
Drive chain excessively loose |6.2.1d|1
Nearside Steering lock stop missing |2.1.3|1
Locking device|s| not correctly fitted which may make the motor bicycle dangerous to ride |6.2.1h|1
Nearside Lower Rear suspension bush excessively deteriorated |2.4.A2a|i||1
Offside Lower Rear suspension bush excessively deteriorated |2.4.A2a|i||1
An item not tested |Manual|1
Front Headlamp at least one does not illuminate on main beam |1.2.2a|ii||1
Chain guard insecure |6.2.1c|1
Front Front mudguard insecure |2.3.7|1
Rear Front mudguard insecure |2.3.7|1
Registration plate issues1

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.

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