| Most common failures | No# failures |
|---|
| Headlamp aim out of alignment | 3 |
| Registration plate issues | 3 |
| Rear position lamp does not illuminate immediately when it is switched on |1.1.3a| | 2 |
| Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 2 |
| Steering headbearing has excessive free play |2.2.2| | 2 |
| Exhaust has a major leak of exhaust gases (6.1.2 (a)) | 1 |
| Nearside Rear Direction indicator likely to become detached (4.4.1 (c) (ii)) | 1 |
| Direction indicator adversely affected by the operation of another lamp (4.4.3 (b)) | 1 |
| Horn sound not in accordance with requirements (7.7 (c)) | 1 |
| Nearside Handlebar grip insecure to handlebar (2.2.1 (d) (ii)) | 1 |
| Steering headbearing has excessive wear or free play (2.2.2 (f) (i)) | 1 |
| Direction indicator not working |1.5.1c| | 1 |
| Direction indicators flashing more than 120 times per minute all |1.5.1c| | 1 |
| Rear Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 1 |
| Headlamp at least one does not illuminate on dipped beam |1.2.2a|i|| | 1 |
| Headlamp at least one does not illuminate on main beam |1.2.2a|ii|| | 1 |
| Rear Rear position lamp does not illuminate immediately when it is switched on |1.1.3a| | 1 |
| Offside Rear Direction indicators not working |1.5.1c| | 1 |
| Drive chain worn to excess |6.2.1e| | 1 |
| Offside Front Direction indicator not working |1.5.1c| | 1 |
| Offside Direction indicator flashing less than 60 times a minute |1.5.1c| | 1 |
| Nearside Direction indicator flashing less than 60 times a minute |1.5.1c| | 1 |
| Exhaust noise is clearly in excess of that emitted by a similar motor bicycle fitted with a standard silencer in average condition |7.1.2| | 1 |
| Brake locking device missing |3.2.A1e| | 1 |
| Offside Direction indicators affected by the operation of another lamp |1.5.1c| | 1 |