| Most common failures | No# failures |
|---|
| Registration plate issues | 81 |
| Rear reflector on motorcycle missing |1.4.1| | 71 |
| Headlamp aim out of alignment | 44 |
| Rear position lamp does not illuminate immediately when it is switched on |1.1.3a| | 34 |
| Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 29 |
| Horn not working |1.7.3a| | 26 |
| Headlamp at least one does not illuminate on dipped beam |1.2.2a|i|| | 24 |
| Front wheel bearings have excessive free play |2.3.5b| | 22 |
| Rear reflector missing (4.8.2 (a) (ii)) | 18 |
| Front Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 16 |
| Rear wheel bearings have excessive free play |2.4.A.2c| | 16 |
| Rear Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 14 |
| Rear Rear reflector on motorcycle missing |1.4.1| | 14 |
| Front wheel bearings are excessively rough |2.3.5b| | 13 |
| Headlamp at least one does not illuminate on main beam |1.2.2a|ii|| | 10 |
| Headlamp not working on dipped beam (4.1.1 (a) (ii)) | 7 |
| Drive chain excessively loose |6.2.1d| | 7 |
| Horn not working (7.7 (a) (ii)) | 6 |
| Horn missing |1.7.1| | 6 |
| Rear reflector missing |4.8.2 |a| |ii|| | 6 |
| Rear Wheel spoke excessively loose |4.2.1b| | 6 |
| Rear Wheel bearing has excessive play (5.1.3 (a) (i)) | 6 |
| Horn not loud enough to be heard by another road user |1.7.3a| | 6 |
| Offside Front shock absorber seal failed and leaking oil |2.3.3| | 6 |
| Stop lamp not working (4.3.1 (a) (ii)) | 5 |
| Rear Position lamp not working (4.2.1 (a)) | 5 |
| Front Horn not working |1.7.3a| | 5 |
| Front position lamp does not illuminate immediately when switched on |1.1.3a| | 5 |
| Stop lamp affected by the operation of another lamp |1.3.2| | 4 |
| Rear Rear position lamp does not illuminate immediately when it is switched on |1.1.3a| | 4 |
| Rear Stop lamp not working (4.3.1 (a) (ii)) | 4 |
| Front Front wheel bearings have excessive free play |2.3.5b| | 4 |
| Headlamp aim beam image kick up to the offside |1.6| | 4 |
| Centre Rear Rear reflector on motorcycle missing |1.4.1| | 4 |
| Front Wheel bearing has excessive play (5.1.3 (a) (i)) | 4 |
| Front Wheel bearing rough when rotated (5.1.3 (b) (i)) | 4 |
| Stop lamp remains on when the brakes are released | 4 |
| Stop lamp remains on when the brake is released |1.3.1e| | 3 |
| Horn not working (7.7 (a)) | 3 |
| Front Headlamp at least one does not illuminate on dipped beam |1.2.2a|i|| | 3 |
| Drive chain excessively tight |6.2.1d| | 3 |
| Headlamp switch faulty |1.2.4| | 3 |
| Horn not working |7.7 |a| |ii|| | 3 |
| Headlamp aim not tested |1.6| | 3 |
| Nearside Front shock absorber seal failed and leaking oil |2.3.3| | 3 |
| Nearside Front Front shock absorber seal failed and leaking oil |2.3.3| | 2 |
| Offside Front Front shock absorber seal failed and leaking oil |2.3.3| | 2 |
| Rear reflector on sidecar missing |1.4.1| | 2 |
| Drive chain worn to excess (6.1.7 (c) (i)) | 2 |
| Rear suspension bush has excessive free play |2.4.A2a|i|| | 2 |
| Rear Brake fluid reservoir fluid level significantly below minimum level (1.1.10 (d) (ii)) | 2 |
| Stop lamp not working |4.3.1 |a| |ii|| | 2 |
| Headlamp insecure |1.2.3b| | 2 |
| Rear shock absorber has inadequate damping effect. |2.4.A.3b| | 2 |
| Front shock absorber seal failed and leaking oil |2.3.3| | 2 |
| Rear Shock absorber has negligible damping effect |5.3.2 |b|| | 2 |
| Drive chain worn to excess |6.2.1e| | 2 |
| Front Front shock absorber seal failed and leaking oil |2.3.3| | 2 |
| Headlamp aim headlamp deteriorated and function impaired |1.2.3a| | 2 |
| Rear Wheel spoke missing |4.2.1b| | 2 |