| Most common failures | No# failures |
|---|
| Headlamp aim out of alignment | 10 |
| Rear reflector on motorcycle missing |1.4.1| | 9 |
| Headlamp aim beam image kick up to the offside |1.6| | 8 |
| Registration plate issues | 6 |
| Front Roller brake test indicates a binding brake |3.3.A1a| | 6 |
| Rear Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 3 |
| Rear wheel bearings have excessive free play |2.4.A.2c| | 3 |
| Drive chain worn to excess |6.2.1e| | 3 |
| Front Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 2 |
| Front wheel bearings have excessive free play |2.3.5b| | 2 |
| Drive chain excessively loose |6.2.1d| | 2 |
| Headlamp aim beam image kick-up is to the offside |1.6.1| | 2 |
| Rear wheel spindle securing nut locking device missing |2.4.A.2b| | 2 |
| Wheel alignment incorrect which adversely affects the handling |2.5.1| | 2 |
| Rear Rear reflector on motorcycle missing |1.4.1| | 2 |
| Rear Brake reaction bracket securing bolt|s| missing |3.2.A1j| | 1 |
| Rear Brake pedal has inadequate reserve travel |3.1.3b| | 1 |
| Front wheel spindle securing nut locking device insecure |2.3.5a| | 1 |
| Nearside Front shock absorber seal failed and leaking oil |2.3.3| | 1 |
| Rear Wheel spoke excessively loose |4.2.1b| | 1 |
| Handlebar mounting clamp loose |2.1.1a| | 1 |
| Nearside Front Brake excessively binding |1.2.1 |f|| | 1 |
| Nearside Front Upper Exhaust is leaking and excessively noisey |7.1.1b| | 1 |
| Front position lamp does not illuminate immediately when switched on |1.1.3a| | 1 |
| Stop lamp does not emit a steady light |1.3.1b| | 1 |
| Offside Front Front suspension assembly component cracked |2.3.1| | 1 |
| Offside Rear Direction indicators not working |1.5.1c| | 1 |
| Nearside Handlebar handgrip not secure to handlebars. |2.1.1c| | 1 |
| Nearside Front Direction indicator not working |1.5.1c| | 1 |
| Offside Front Direction indicator not working |1.5.1c| | 1 |
| Nearside Rear Direction indicator not working |1.5.1c| | 1 |
| Offside Rear Direction indicator not working |1.5.1c| | 1 |
| Centre Lower Rear suspension bush has excessive free play |2.4.A2a|i|| | 1 |
| Brake pedal pivots excessively worn |3.1.3a| | 1 |
| Rear Brake linkage clevis joint excessively worn |3.2.A1d| | 1 |
| Rear Drive chain worn to excess |6.2.1e| | 1 |
| Lower Rear mono-shock insecure |2.4.B.4| | 1 |
| Rear Brake reaction bracket securing bolt|s| loose |3.2.A1j| | 1 |
| Rear position lamp missing |1.1.1a| | 1 |
| Stop lamp missing |1.3.3a| | 1 |
| Offside Front Handlebar handgrip not secure to handlebars. |2.1.1c| | 1 |
| Front Brake lever cannot be applied smoothly |3.1.3d| | 1 |
| Rear Footrest missing |6.2.1a| | 1 |
| Rear suspension bush has excessive free play |2.4.A2a|i|| | 1 |
| Rear Lower Rear suspension bush has excessive free play |2.4.A2a|i|| | 1 |
| Nearside Front Drive chain sprocket worn to excess |6.2.1e| | 1 |
| Nearside Rear Drive chain sprocket worn to excess |6.2.1e| | 1 |
| Rear Rear suspension bush has excessive free play |2.4.A2a|i|| | 1 |
| Nearside Rear Direction indicator insecure |1.5.3b| | 1 |
| Centre Rear Rear mono-shock pivot seized |2.4.B.4| | 1 |
| Headlamp at least one does not illuminate on dipped beam |1.2.2a|i|| | 1 |
| Front Rear reflector on motorcycle missing |1.4.1| | 1 |
| Front Brake disc|s| has excessive run out |3.2.A1m| | 1 |
| Front Brake disc|s| is excessively distorted |3.2.A1m| | 1 |
| Nearside Front Handlebar deformed |2.1.1b| | 1 |
| Rear Drive chain excessively tight |6.2.1d| | 1 |
| Centre Rear Lower Rear suspension bush has excessive free play |2.4.A2a|i|| | 1 |
| Roller brake test The less effective brake control does not achieve an efficiency of 25%. |3.3.A2b| | 1 |
| Brake lever is inoperative |3.1.3c| | 1 |
| Brake disc|s| friction surface contaminated by oil or grease |3.2.A1k| | 1 |
| Horn not loud enough to be heard by another road user |1.7.3a| | 1 |
| Nearside Steering lock stop ineffective |2.1.3| | 1 |
| Throttle operating incorrectly sticking slightly |6.2.1f| | 1 |
| Registration plate lamp issues | 1 |
| Rear reflector missing (4.8.2 (a) (ii)) | 1 |
| Rear Rear reflector missing (4.8.2 (a) (ii)) | 1 |
| Central Front Exhaust has a major leak of exhaust gases (6.1.2 (a)) | 1 |
| Headlamp not working on dipped beam (4.1.1 (a) (ii)) | 1 |
| Drive chain excessively loose (6.1.7 (c) (i)) | 1 |
| Rear Suspension rod pin or bush excessively worn (5.3.4 (a) (i)) | 1 |
| Headlamp reflector seriously defective (4.1.1 (b) (ii)) | 1 |