| Most common failures | No# failures |
|---|
| Rear reflector on motorcycle missing |1.4.1| | 8 |
| Registration plate issues | 8 |
| Headlamp aim out of alignment | 6 |
| Front Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 6 |
| Rear Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 4 |
| Rear position lamp does not illuminate immediately when it is switched on |1.1.3a| | 3 |
| Throttle has a significant change in engine speed whilst moving the steering from lock to lock |2.1.4| | 3 |
| Front wheel bearings are excessively rough |2.3.5b| | 3 |
| Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 3 |
| Drive chain excessively loose |6.2.1d| | 2 |
| Drive chain worn to excess |6.2.1e| | 2 |
| Front wheel bearings have excessive free play |2.3.5b| | 2 |
| Centre Rear reflector on motorcycle missing |1.4.1| | 1 |
| Centre Rear Rear reflector on motorcycle missing |1.4.1| | 1 |
| Indicator switch insecure |1.5.4| | 1 |
| Steering headbearing has excessive free play |2.2.2| | 1 |
| Front Front wheel bearings have excessive free play |2.3.5b| | 1 |
| Front Front wheel bearings are excessively rough |2.3.5b| | 1 |
| Offside Rear Direction indicators not working |1.5.1c| | 1 |
| Front Throttle operating incorrectly |6.2.1f| | 1 |
| Nearside Inner Rear Rear wheel bearings have excessive free play |2.4.A.2c| | 1 |
| Rear Drive chain sprocket worn to excess |6.2.1e| | 1 |
| Front Roller brake test indicates excessive fluctuation of brake effort |3.3.A1d| | 1 |
| Stop lamp remains on when the brake is released |1.3.1e| | 1 |
| Offside Rear Direction indicator not working |1.5.1c| | 1 |
| Locking device|s| not correctly fitted which may make the motor bicycle dangerous to ride |6.2.1h| | 1 |
| Rear Brake disc|s| cracked |3.2.A1g| | 1 |
| Rear wheel bearings have excessive free play |2.4.A.2c| | 1 |
| Locking devices not correctly fitted which may make the motor bicycle dangerous to ride |6.2.1h| | 1 |
| Rear Rear position lamp does not illuminate immediately when it is switched on |1.1.3a| | 1 |
| Dipswitch does not operate immediately when selected on dipped beam (4.1.3 (b)) | 1 |
| Rear Direction indicator obviously incorrectly positioned solo motorcycles - 240mm at the front and 180mm at the rear (4.4.3 (a)) | 1 |
| Rear Stop lamp emits other than a steady red light |1.3.1b| | 1 |
| Rear Direction indicator affected by the operation of another lamp |1.5.1c| | 1 |
| Throttle has a significant change in engine speed whilst moving the steering from lock to lock when moving to the right |2.1.4| | 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 |
| Front Dipswitch does not deflect the main beam/s, making them into dipped beam/s |1.2.2b|ii|| | 1 |
| Headlamp switch insecure |1.2.4| | 1 |
| Headlamp at least one does not illuminate on main beam |1.2.2a|ii|| | 1 |
| Rear Brake component worn and seriously reduced in strength |3.2.A1| | 1 |
| Offside Front Direction indicator not working |1.5.1c| | 1 |
| Steering control fouling between components which interferes with the free movement of the steering |2.1.2a| | 1 |
| Exhaust markings indicating not for road use or similar wording |7.1.4| | 1 |
| Steering lock stop ineffective |2.1.3| | 1 |
| Front Brake disc|s| friction surface contaminated by oil or grease |3.2.A1k| | 1 |
| Rear Brake disc|s| friction surface contaminated by oil or grease |3.2.A1k| | 1 |
| Steering movement excessively `notchy` with the wheel raised |2.2.1b| | 1 |
| Front Stop lamp switch with a delay in operation front brake switch not working correctly when front brake lever applied (4.3.2 (a) (ii)) | 1 |
| Drive chain excessively tight |6.2.1d| | 1 |
| Nearside Front shock absorber seal failed and leaking oil |2.3.3| | 1 |
| Nearside Rear Direction indicator insecure |1.5.3b| | 1 |