| Most common failures | No# failures |
|---|
| Headlamp aim out of alignment | 95 |
| Headlamp aim beam image kick up to the offside |1.6| | 42 |
| Registration plate issues | 37 |
| Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 15 |
| Front Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 14 |
| Rear Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 10 |
| Front Headlamp aim beam image kick-up is to the offside |1.6.1| | 9 |
| Rear reflector missing (4.8.2 (a) (ii)) | 8 |
| Front position lamp does not illuminate immediately when switched on |1.1.3a| | 7 |
| Front wheel bearings have excessive free play |2.3.5b| | 6 |
| Rear position lamp does not illuminate immediately when it is switched on |1.1.3a| | 6 |
| Drive chain excessively loose |6.2.1d| | 6 |
| Headlamp at least one does not illuminate on dipped beam |1.2.2a|i|| | 5 |
| Rear Stop lamp not working (4.3.1 (a) (ii)) | 5 |
| Nearside Handlebar handgrip not secure to handlebars. |2.1.1c| | 5 |
| Headlamp aim beam image kick up to the offside (1.6) | 5 |
| Front Stop lamp not working (4.3.1 (a) (ii)) | 4 |
| Rear Wheel spoke excessively loose |4.2.1b| | 4 |
| Front Headlamp aim beam image kick up to the offside |1.6| | 4 |
| Front Position lamp not working (4.2.1 (a)) | 4 |
| Front Roller brake test indicates a binding brake |3.3.A1a| | 4 |
| Headlamp aim projected beam image obviously incorrect (4.1.2 (c)) | 4 |
| Headlamp aim beam image kick-up is to the offside |1.6.1| | 4 |
| Rear reflector on motorcycle missing |1.4.1| | 3 |
| Headlamp at least one does not illuminate on main beam |1.2.2a|ii|| | 3 |
| Rear wheel bearings have excessive free play |2.4.A.2c| | 3 |
| Throttle operating incorrectly |6.2.1f| | 3 |
| Rear Position lamp not working |4.2.1 |a|| | 3 |
| Direction indicators not working |1.5.1c| | 2 |
| Nearside Rear Direction indicators not working |1.5.1c| | 2 |
| Offside Front Footrest insecure |6.2.1a| | 2 |
| Front Wheel bearing has excessive play (5.1.3 (a) (i)) | 2 |
| Brake locking device missing |3.2.A1e| | 2 |
| Front wheel bearings are excessively rough |2.3.5b| | 2 |
| Locking devices not correctly fitted which may make the motor bicycle dangerous to ride |6.2.1h| | 2 |
| Front Front wheel bearings have excessive free play |2.3.5b| | 2 |
| Registration plate lamp issues | 2 |
| Stop lamp does not illuminate by the operation of both brake controls (4.3.2 (a) (iii)) | 2 |
| Headlamp not working on dipped beam (4.1.1 (a) (ii)) | 2 |
| Drive chain excessively tight (6.1.7 (k) (i)) | 2 |
| Stop lamp not working (4.3.1 (a) (ii)) | 2 |
| Rear Position lamp not working (4.2.1 (a)) | 2 |
| Rear Brake locking device missing |3.2.A1e| | 2 |
| Front Brake lever has insufficient reserve travel (1.1.2 (a)) | 2 |
| Stop lamp does not illuminate immediately a brake applies (1.3.1a) | 2 |