| Most common failures | No# failures |
|---|
| Rear reflector on motorcycle missing |1.4.1| | 6 |
| Horn not working |1.7.3a| | 4 |
| Front wheel bearings have excessive free play |2.3.5b| | 3 |
| Registration plate issues | 3 |
| Rear reflector missing (4.8.2 (a) (ii)) | 3 |
| Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 2 |
| Headlamp aim out of alignment | 2 |
| Offside Front shock absorber seal failed and leaking oil |2.3.3| | 2 |
| Rear suspension bush has excessive free play |2.4.A2a|i|| | 2 |
| Rear position lamp incorrect colour |1.1.2b| | 1 |
| Stop lamp affected by the operation of another lamp |1.3.2| | 1 |
| Rear Wheel bearing has excessive play (5.1.3 (a) (i)) | 1 |
| Rear Brake excessively binding (1.2.1 (f)) | 1 |
| Headlamp insecure (4.1.1 (c)) | 1 |
| Riders seat insecure will not lock (6.2.5 (a) (ii)) | 1 |
| Rear position lamp does not illuminate immediately when it is switched on |1.1.3a| | 1 |
| Rear position lamp missing |1.1.1a| | 1 |
| Headlamp not working on dipped beam |4.1.1 |a| |ii|| | 1 |
| Headlamp at least one does not illuminate on main beam |1.2.2a|ii|| | 1 |
| Front Front wheel bearings have excessive free play |2.3.5b| | 1 |
| Front Front wheel bearings are excessively rough |2.3.5b| | 1 |
| Nearside Front shock absorber seal failed and leaking oil |2.3.3| | 1 |
| Headlamp at least one does not illuminate on dipped beam |1.2.2a|i|| | 1 |
| Front position lamp does not illuminate immediately when switched on |1.1.3a| | 1 |
| Rear Drive chain sprocket worn to excess |6.2.1e| | 1 |
| Drive chain worn to excess |6.2.1e| | 1 |
| Rear wheel bearings have excessive free play |2.4.A.2c| | 1 |
| Brake master cylinder has an excessively worn master cylinder pivot. |3.2.B5| | 1 |
| All position lamps do not illuminate immediately when switched on |1.1.3a| | 1 |
| Rear mono-shock pivot excessively worn |2.4.B.4| | 1 |
| Front Exhaust is leaking and excessively noisey |7.1.1b| | 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 |
| 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 |
| Horn not working (1.7.3a) | 1 |
| Steering movement excessively `notchy` with the wheel raised |2.2.1b| | 1 |
| Locking device|s| not correctly fitted which may make the motor bicycle dangerous to ride |6.2.1h| | 1 |
| Rear Brake disc insecure |1.1.14 |a| |ii|| | 1 |
| Rear Suspension arm ball joint excessively worn Swing arm |5.3.4 |a| |i|| | 1 |
| Rear Suspension component ball joint excessively worn Linkage bushes |5.3.4 |a| |i|| | 1 |
| Drive chain horseshoe locking device incorrectly fitted |6.1.7 |j| |i|| | 1 |
| Throttle has a significant change in engine speed whilst moving the steering from lock to lock |2.1.4| | 1 |
| Rear Wheel has an excessively distorted bead rim. |4.2.2| | 1 |