| Most common failures | No# failures |
|---|
| Headlamp aim out of alignment | 11 |
| Drive chain excessively loose |6.2.1d| | 8 |
| Drive chain worn to excess |6.2.1e| | 4 |
| Drive chain sprocket carrier worn to excess |6.2.1e| | 4 |
| Front wheel bearings have excessive free play |2.3.5b| | 4 |
| Brake pedal has inadequate reserve travel |3.1.3b| | 3 |
| Front Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 3 |
| Rear reflector on motorcycle missing |1.4.1| | 3 |
| Rear Roller brake test indicates a sticking brake |3.3.A1a| | 2 |
| Direction indicators flashing more than 120 times per minute |1.5.1c| | 2 |
| Headlamp at least one does not illuminate on dipped beam |1.2.2a|i|| | 2 |
| Headlamp at least one does not illuminate on main beam |1.2.2a|ii|| | 2 |
| Steering movement excessively `notchy` with the wheel raised |2.2.1b| | 2 |
| Registration plate issues | 2 |
| Headlamp switch faulty |1.2.4| | 2 |
| Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 2 |
| Brake pedal is positioned so that the brake cannot be readily applied |3.1.3c| | 2 |
| Handlebar deformed |2.1.1b| | 2 |
| Front position lamp does not illuminate immediately when switched on |1.1.3a| | 2 |
| Horn not working |1.7.3a| | 1 |
| Rear position lamp does not illuminate immediately when it is switched on |1.1.3a| | 1 |
| Upper Throttle operating incorrectly |6.2.1f| | 1 |
| Rear Rear suspension bearing has excessive free play |2.4.A2a|i|| | 1 |
| Drive chain sprocket worn to excess (6.1.7 (c) (i)) | 1 |
| Front Position lamp not working (4.2.1 (a)) | 1 |
| Front Wheel damaged significantly reducing the original strength |4.2.1a| | 1 |
| Rear suspension bush has excessive free play |2.4.A2a|i|| | 1 |
| Front position lamp damaged and function impaired |1.1.1b| | 1 |
| Rear Stop lamp damaged and function impaired |1.3.3a| | 1 |
| Nearside Indicator switch defective |1.5.4| | 1 |
| Rear suspension bearing has excessive free play |2.4.A2a|i|| | 1 |
| Roller brake test The less effective brake control does not achieve an efficiency of 25%. |3.3.A2b| | 1 |
| Headlamp aim not tested |1.6| | 1 |
| Position lamp switch faulty |1.1.4a| | 1 |
| Rear Brake pedal has inadequate reserve travel |3.1.3b| | 1 |
| Steering movement excessively stiff with the wheel raised |2.2.1b| | 1 |
| Wheel fractured significantly reducing the original strength |4.2.1a| | 1 |
| Rear Wheel bearing has excessive play |5.1.3 |a| |i|| | 1 |
| Front Stop lamp not working (4.3.1 (a) (ii)) | 1 |
| Front Wheel bearing has excessive play (5.1.3 (a) (i)) | 1 |
| Rear Inner Footrest missing (6.2.12 (a)) | 1 |
| Rear Outer Footrest missing (6.2.12 (a)) | 1 |
| Rear Brake clevis joint insecure (1.1.15 (c)) | 1 |
| Front Front wheel bearings have excessive free play |2.3.5b| | 1 |
| Front Wheel bearing rough when rotated |5.1.3 |b| |i|| | 1 |
| Rear Brake grabbing severely (1.2.1 (c)) | 1 |
| Headlamp aim not tested (4.1.2 (b)) | 1 |
| Front Stop lamp does not illuminate by the operation of both brake controls (4.3.2 (a) (iii)) | 1 |
| Rear Position lamp not working (4.2.1 (a)) | 1 |
| Rear reflector missing (4.8.2 (a) (ii)) | 1 |
| Headlamp not working on main beam (4.1.1 (a) (ii)) | 1 |
| Registration plate lamp issues | 1 |
| Rear Brake pedal attachment screws loose |3.1.2b| | 1 |
| Rear Drive chain sprocket carrier worn to excess |6.2.1e| | 1 |
| Drive chain sprocket worn to excess |6.2.1e| | 1 |
| Stop lamp deteriorated and function impaired |1.3.3a| | 1 |
| Brake locking device missing |3.2.A1e| | 1 |
| Front Brake excessively binding |1.2.1 |f|| | 1 |
| Rear Brake excessively binding |1.2.1 |f|| | 1 |
| Exhaust has a major leak of exhaust gases |6.1.2 |a|| | 1 |
| Drive chain sprocket carrier worn to excess cush drive rubbers |6.2.1e| | 1 |
| Rear wheel bearings are excessively rough |2.4.A.2c| | 1 |
| Front Brake disc significantly and obviously worn (1.1.14 (a) (i)) | 1 |
| Rear Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 1 |
| Offside Front Handlebar handgrip not secure to handlebars. |2.1.1c| | 1 |
| Exhaust mounting does not fully support the exhaust system |7.1.1.c| | 1 |
| Locking devices not correctly fitted which may make the motor bicycle dangerous to ride |6.2.1h| | 1 |