| Most common failures | No# failures |
|---|
| Rear reflector on motorcycle missing |1.4.1| | 10 |
| Headlamp aim out of alignment | 7 |
| Headlamp at least one does not illuminate on dipped beam |1.2.2a|i|| | 6 |
| Front Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 6 |
| Drive chain excessively loose |6.2.1d| | 5 |
| Headlamp at least one does not illuminate on main beam |1.2.2a|ii|| | 3 |
| Rear position lamp does not illuminate immediately when it is switched on |1.1.3a| | 3 |
| Front position lamp does not illuminate immediately when switched on |1.1.3a| | 2 |
| Throttle has a significant change in engine speed whilst moving the steering from lock to lock |2.1.4| | 2 |
| Offside Rear Direction indicators not working |1.5.1c| | 2 |
| Headlamp dipped beam affected by the operation of another lamp |1.2.2c| | 2 |
| Rear Footrest missing |6.2.1a| | 2 |
| Rear Drive chain sprocket worn to excess |6.2.1e| | 2 |
| Lower Rear suspension bush has excessive free play |2.4.A2a|i|| | 2 |
| Nearside Handlebar handgrip not secure to handlebars. |2.1.1c| | 2 |
| Drive chain worn to excess |6.2.1e| | 2 |
| Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 2 |
| Horn not working |1.7.3a| | 2 |
| Rear Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 2 |
| Horn not loud enough to be heard by another road user |1.7.3a| | 1 |
| Horn is not a constant note |1.7.3c| | 1 |
| Wheel alignment incorrect which adversely affects the steering |2.5.1| | 1 |
| Handlebar deformed |2.1.1b| | 1 |
| Stop lamp not working (4.3.1 (a) (ii)) | 1 |
| Fuel cap does not fasten securely maintaining the sealing arrangement |7.2.2b| | 1 |
| Stop lamp remains on when the brake is released |1.3.1e| | 1 |
| Front position lamp adversely affected by the operation of another lamp |1.1.3b| | 1 |
| Nearside Front Direction indicator not working |1.5.1c| | 1 |
| Rear Rear position lamp does not illuminate immediately when it is switched on |1.1.3a| | 1 |
| Offside Front wheel spindle securing nut locking device missing |2.3.5a| | 1 |
| Rear mono-shock pivot excessively worn |2.4.B.4| | 1 |
| Rear Direction indicator not working |1.5.1c| | 1 |
| Steering movement excessively `notchy` with the weight on the lower bearing |2.2.1a| | 1 |
| Rear suspension bush has excessive free play |2.4.A2a|i|| | 1 |
| Locking devices not correctly fitted which may make the motor bicycle dangerous to ride |6.2.1h| | 1 |
| Direction indicator flashing more than 120 times per minute |1.5.1c| | 1 |
| Headlamp insecure |1.2.3b| | 1 |
| Rear Rear reflector on motorcycle missing |1.4.1| | 1 |
| Roller brake test The less effective brake control does not achieve an efficiency of 25%. |3.3.A2b| | 1 |
| Rear Rear suspension bush has excessive free play |2.4.A2a|i|| | 1 |
| Rear Direction indicator insecure |1.5.3b| | 1 |
| Registration plate issues | 1 |
| Nearside Rear Direction indicator incorrect colour |1.5.1b| | 1 |
| Rear Rear wheel bearings have excessive free play |2.4.A.2c| | 1 |
| Rear Brake pedal pivots excessively worn |3.1.3a| | 1 |
| Front Dipswitch does not extinquish main beam/s, leaving at least 1 dipped beam headlamp |1.2.2b|i|| | 1 |
| Clutch lever shortened so it cannot be readily operated. |6.2.1g| | 1 |
| Riders seat insecure |6.2.1a| | 1 |
| Stop lamp missing |1.3.3a| | 1 |
| Rear Rear position lamp adversely affected by the operation of another lamp |1.1.3b| | 1 |
| Lower Rear mono-shock pivot excessively worn |2.4.B.4| | 1 |
| Nearside Rear Direction indicator not working |1.5.1c| | 1 |
| Nearside Front shock absorber seal failed and leaking oil |2.3.3| | 1 |
| Front Direction indicator flashing less than 60 times a minute |1.5.1c| | 1 |
| Rear Direction indicator flashing less than 60 times a minute |1.5.1c| | 1 |
| Rear wheel bearings have excessive free play |2.4.A.2c| | 1 |
| Offside Steering lock stop maladjusted |2.1.3| | 1 |
| Rear Lower Rear suspension bush has excessive free play |2.4.A2a|i|| | 1 |
| Front Wheel has an excessively distorted bead rim. |4.2.2| | 1 |
| Locking device|s| not correctly fitted which may make the motor bicycle dangerous to ride |6.2.1h| | 1 |
| Horn is not continous or uniform |1.7.3c| | 1 |
| Rear suspension bearing has excessive free play |2.4.A2a|i|| | 1 |
| Steering control fouling between components which interferes with the free movement of the steering |2.1.2a| | 1 |
| Wheel alignment incorrect which adversely affects the handling |2.5.1| | 1 |
| Direction indicators not working |1.5.1c| | 1 |
| Offside Front Brake lever insecure |3.1.2a| | 1 |
| Drive chain excessively tight |6.2.1d| | 1 |