| Most common failures | No# failures |
|---|
| Headlamp aim out of alignment | 8 |
| Rear reflector on motorcycle missing |1.4.1| | 4 |
| Registration plate issues | 3 |
| Headlamp at least one does not illuminate on main beam |1.2.2a|ii|| | 3 |
| Registration plate lamp issues | 2 |
| Horn not working |1.7.3a| | 2 |
| Drive chain worn to excess |6.2.1e| | 2 |
| Rear shock absorber has inadequate damping effect. |2.4.A.3b| | 2 |
| Direction indicators not working |1.5.1c| | 1 |
| Headlamp at least one does not illuminate on dipped beam |1.2.2a|i|| | 1 |
| Front Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 1 |
| Rear Wheel spoke cracked (5.2.2 (d)) | 1 |
| Throttle has a significant change in engine speed whilst moving the steering from lock to lock |2.1.4| | 1 |
| Rear Drive chain sprocket carrier worn to excess |6.2.1e| | 1 |
| Rear Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 1 |
| Rear Rear position lamp does not illuminate immediately when it is switched on |1.1.3a| | 1 |
| Throttle operating incorrectly |6.2.1f| | 1 |
| Front position lamp does not illuminate immediately when switched on |1.1.3a| | 1 |
| Rear Wheel spoke cracked. |4.2.1b| | 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 front (4.3.1 (a) (ii)) | 1 |
| Suspension rod ball joint excessively worn seized suspension linkage (5.3.4 (a) (i)) | 1 |
| Front Brake excessively binding (1.2.1 (f)) | 1 |
| Stop lamp not working (4.3.1 (a) (ii)) | 1 |
| Rear Position lamp adversely affected by the operation of another lamp indicators (4.2.3 (b)) | 1 |
| Rear Stop lamp adversely affected by the operation of another lamp indicators (4.3.3 (b)) | 1 |
| Rear Stop lamp adversely affected by the operation of another lamp by operation of dipped beam (4.3.3 (b)) | 1 |
| Stop lamp not working on front lever or rear pedal (4.3.1 (a) (ii)) | 1 |
| Rear Position lamp adversely affected by the operation of another lamp by indicators (4.2.3 (b)) | 1 |
| Drive chain excessively loose (6.1.7 (c) (i)) | 1 |
| Front Brake lever has insufficient reserve travel (1.1.2 (a)) | 1 |
| Front Headlamp at least one does not illuminate on dipped beam |1.2.2a|i|| | 1 |
| Stop lamp remains on when the brake is released |1.3.1e| | 1 |
| Rear position lamp does not illuminate immediately when it is switched on |1.1.3a| | 1 |
| Nearside Front All direction indicators not working |4.4.1 |a| |ii|| | 1 |
| Drive chain so loose it is likely to fail (6.1.7 (c) (ii)) | 1 |
| Rear Brake pivot has restricted free movement (1.1.15 (e)) | 1 |
| Rear Rear shock absorber has inadequate damping effect. |2.4.A.3b| | 1 |
| Rear Shock absorber has a serious fluid leak (5.3.2 (b)) | 1 |
| Rear Shock absorber has negligible damping effect (5.3.2 (b)) | 1 |
| Front shock absorber seal failed and leaking oil |2.3.3| | 1 |
| Rear Locking devices not correctly fitted which may make the motor bicycle dangerous to ride |6.2.1h| | 1 |
| Horn not loud enough to be heard by another road user |1.7.3a| | 1 |
| Front Brake lever has inadequate reserve travel |3.1.3b| | 1 |
| Front Drive chain sprocket worn to excess |6.2.1e| | 1 |
| Offside Rear wheel spindle securing nut locking device missing |2.4.A.2b| | 1 |
| Nearside Direction indicator not working |1.5.1c| | 1 |
| Nearside Front Front shock absorber seal failed and leaking oil |2.3.3| | 1 |
| Drive chain excessively tight |6.2.1d| | 1 |