| Most common failures | No# failures |
|---|
| Horn not working |1.7.3a| | 4 |
| Headlamp aim out of alignment | 3 |
| Front position lamp does not illuminate immediately when switched on |1.1.3a| | 3 |
| Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 3 |
| Rear position lamp does not illuminate immediately when it is switched on |1.1.3a| | 3 |
| Headlamp main beam affected by the operation of another lamp |1.2.2c| | 2 |
| Front Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 2 |
| Rear Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 2 |
| Wheel alignment incorrect which adversely affects the handling |2.5.1| | 2 |
| Registration plate issues | 2 |
| Horn not loud enough to be heard by another road user |1.7.3a| | 1 |
| Brake pedal cannot be released smoothly |3.1.3d| | 1 |
| Direction indicators affected by the operation of another lamp |1.5.1c| | 1 |
| Nearside Front Direction indicators not working |1.5.1c| | 1 |
| Front position lamp obscured more than 50% |1.1.1d| | 1 |
| Direction indicator incorrect colour |1.5.1b| | 1 |
| Offside Rear Direction indicator insecure |1.5.3b| | 1 |
| Drive chain excessively loose |6.2.1d| | 1 |
| Front Direction indicator flashing less than 60 times a minute |1.5.1c| | 1 |
| Front wheel spindle securing nut locking device missing |2.3.5a| | 1 |
| Rear Brake locking device missing |3.2.A1e| | 1 |
| Front Horn not working |1.7.3a| | 1 |
| Nearside Rear Wheel spoke excessively loose |4.2.1b| | 1 |
| Front Horn is not a constant note |1.7.3c| | 1 |
| Rear Direction indicator flashing less than 60 times a minute |1.5.1c| | 1 |
| Stop lamp affected by the operation of another lamp |1.3.2| | 1 |
| Rear wheel bearings have excessive free play |2.4.A.2c| | 1 |
| Locking device|s| not correctly fitted which may make the motor bicycle dangerous to ride |6.2.1h| | 1 |
| Rear position lamp insecure |1.1.1c| | 1 |
| Nearside Front shock absorber seal failed and leaking oil |2.3.3| | 1 |
| Rear position lamp adversely affected by the operation of another lamp |1.1.3b| | 1 |
| Nearside Rear shock absorber has inadequate damping effect. |2.4.A.3b| | 1 |
| Offside Rear shock absorber has inadequate damping effect. |2.4.A.3b| | 1 |
| Direction indicators not working |1.5.1c| | 1 |
| Front wheel bearings are excessively rough |2.3.5b| | 1 |
| Front Roller brake test indicates a binding brake |3.3.A1a| | 1 |
| Front position lamp insecure |1.1.1c| | 1 |
| Wheel alignment incorrect which adversely affects the steering |2.5.1| | 1 |
| Front Direction indicator affected by the operation of another lamp |1.5.1c| | 1 |
| Front Stop lamp remains on when the brake is released |1.3.1e| | 1 |
| Fuel system component leaking |7.2.1a| | 1 |
| Roller brake test The less effective brake control does not achieve an efficiency of 25%. |3.3.A2b| | 1 |
| Rear shock absorber has inadequate damping effect. |2.4.A.3b| | 1 |
| Throttle operating incorrectly |6.2.1f| | 1 |
| Headlamp aim headlamp damaged and function impaired |1.2.3a| | 1 |
| Handlebar deformed |2.1.1b| | 1 |
| Rear Drive chain sprocket worn to excess |6.2.1e| | 1 |
| Rear Brake back plate insecure (1.1.14 (d)) | 1 |