| Most common failures | No# failures |
|---|
| Headlamp aim out of alignment | 6 |
| Registration plate issues | 3 |
| Front Position lamp not working |4.2.1 |a|| | 3 |
| Horn not working |7.7 |a| |ii|| | 2 |
| Front Stop lamp not working |4.3.1 |a| |ii|| | 2 |
| Drive chain excessively loose (6.1.7 (c) (i)) | 2 |
| Rear Brake performance not tested |1.2.1 |g|| | 1 |
| Rear Position lamp not working (4.2.1 (a)) | 1 |
| Rear Brake reaction bracket excessively worn (1.1.15 (b)) | 1 |
| Rear Brake component modification unsafe REAR BRAKE PIVOT MISSING |1.1.21 |d| |i|| | 1 |
| Stop lamp not working Front Switch |4.3.1 |a| |ii|| | 1 |
| Front Stop lamp not working (4.3.1 (a) (ii)) | 1 |
| Headlamp aim not tested no high or low beam (4.1.2 (b)) | 1 |
| Drive chain horseshoe locking device incorrectly fitted (6.1.7 (j) (i)) | 1 |
| Headlamp not working on dipped beam |4.1.1 |a| |ii|| | 1 |
| Headlamp not working on main beam |4.1.1 |a| |ii|| | 1 |
| Stop lamp not working |4.3.1 |a| |ii|| | 1 |
| Direction indicator not working |4.4.1 |a| |ii|| | 1 |
| Front Headlamp at least one does not illuminate on dipped beam |1.2.2a|i|| | 1 |
| Front Headlamp at least one does not illuminate on main beam |1.2.2a|ii|| | 1 |
| Front Horn not working |7.7 |a| |ii|| | 1 |
| All direction indicators adversely affected by the operation of another lamp indicators flash too fast when rear brake light is operated (4.4.3 (b)) | 1 |
| Drive chain excessively loose |6.2.1d| | 1 |
| Stop lamp does not emit a steady light |1.3.1b| | 1 |
| Drive chain so loose it is likely to fail |6.1.7 |c| |ii|| | 1 |
| Front Headlamp not working on dipped beam |4.1.1 |a| |ii|| | 1 |
| Rear Brake excessively binding |1.2.1 |f|| | 1 |
| Central Front Headlamp not working on dipped beam (4.1.1 (a) (ii)) | 1 |
| Central Front Headlamp not working on main beam (4.1.1 (a) (ii)) | 1 |
| Central Front Headlamp aim not tested (4.1.2 (b)) | 1 |
| Offside Rear Direction indicator incorrect colour (4.4.3 (a)) | 1 |
| Nearside Rear Drive chain excessively loose (6.1.7 (c) (i)) | 1 |
| Nearside Rear Drive chain worn to excess (6.1.7 (c) (i)) | 1 |
| Horn not working (7.7 (a) (ii)) | 1 |
| Rear Stop lamp not working STOP LAMP NOT WORKING OFF REAR BRAKE (4.3.1 (a) (ii)) | 1 |
| Rear brake binding | 1 |
| Nearside Drive chain so worn it is likely to fail |6.1.7 |c| |ii|| | 1 |
| Drive chain so worn it is likely to fail (6.1.7 (c) (ii)) | 1 |
| Drive chain sprocket worn to excess (6.1.7 (c) (i)) | 1 |
| Suspension arm pin or bush excessively worn swinging arm bushes (5.3.4 (a) (i)) | 1 |
| Nearside Rear Drive chain excessively tight (6.1.7 (k) (i)) | 1 |
| Offside Rear Brake component insecure split pin missing in brake arm (1.1.21 (c)) | 1 |
| Throttle control functioning such that safe operation of the motorcycle is adversely affected (6.2.7 (a) (ii)) | 1 |
| Registration plate lamp issues | 1 |
| Drive chain worn to excess (6.1.7 (c) (i)) | 1 |
| Central Front Upper Horn not working (7.7 (a)) | 1 |
| Front Stop lamp switch with a delay in operation (4.3.2 (a) (ii)) | 1 |