| Most common failures | No# failures |
|---|
| Headlamp aim out of alignment | 12 |
| Front Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 12 |
| Rear reflector on motorcycle missing |1.4.1| | 10 |
| Headlamp at least one does not illuminate on dipped beam |1.2.2a|i|| | 9 |
| Drive chain excessively loose |6.2.1d| | 8 |
| Drive chain worn to excess |6.2.1e| | 7 |
| Roller brake test The less effective brake control does not achieve an efficiency of 25%. |3.3.A2b| | 7 |
| Headlamp at least one does not illuminate on main beam |1.2.2a|ii|| | 6 |
| Registration plate issues | 5 |
| Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 5 |
| Riders seat insecure |6.2.1a| | 5 |
| Nearside Handlebar handgrip not secure to handlebars. |2.1.1c| | 4 |
| Handlebar deformed |2.1.1b| | 4 |
| Rear Drive chain sprocket worn to excess |6.2.1e| | 4 |
| Horn not working |1.7.3a| | 4 |
| Brake pedal has inadequate reserve travel |3.1.3b| | 4 |
| Headlamp aim beam image kick up to the offside |1.6| | 4 |
| Nearside Front Direction indicators not working |1.5.1c| | 3 |
| Rear position lamp does not illuminate immediately when it is switched on |1.1.3a| | 3 |
| Throttle operating incorrectly |6.2.1f| | 3 |
| Steering headbearing has excessive free play |2.2.2| | 3 |
| Front wheel bearings have excessive free play |2.3.5b| | 3 |
| Drive chain excessively tight |6.2.1d| | 3 |
| Rear Direction indicator not working |1.5.1c| | 3 |
| Front Roller brake test indicates excessive fluctuation of brake effort |3.3.A1d| | 3 |
| Offside Front Direction indicators not working |1.5.1c| | 2 |
| Offside Rear Direction indicators not working |1.5.1c| | 2 |
| Rear Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 2 |
| Nearside Front shock absorber seal failed and leaking oil |2.3.3| | 2 |
| Offside Front shock absorber seal failed and leaking oil |2.3.3| | 2 |
| Rear wheel bearings have excessive free play |2.4.A.2c| | 2 |
| Wheel alignment incorrect which adversely affects the handling |2.5.1| | 2 |
| Front Drive chain sprocket worn to excess |6.2.1e| | 2 |
| Rear suspension bush has excessive free play |2.4.A2a|i|| | 2 |
| Rear Roller brake test indicates excessive fluctuation of brake effort |3.3.A1d| | 2 |
| Front Steering headbearing has excessive free play |2.2.2| | 2 |
| Nearside Rear Footrest missing |6.2.1a| | 2 |
| Offside Rear Footrest missing |6.2.1a| | 2 |
| Rear Brake component has restricted free movement and operation is likely to be impeded |3.2.A1h| | 2 |
| Rear Wheel bearing play so excessive it is likely to break up |5.1.3 |a| |ii|| | 2 |
| Rear Roller brake test indicates a binding brake |3.3.A1a| | 2 |
| Stop lamp does not illuminate immediately a brake applies Front |1.3.1a| | 1 |
| Nearside Rear Direction indicators not working |1.5.1c| | 1 |
| Steering control handlebar movement restricted by taut cables |2.1.2c| | 1 |
| Headlamp insecure |1.2.3b| | 1 |
| Throttle operating incorrectly sticking on/not returning correctly |6.2.1f| | 1 |
| Locking devices not correctly fitted which may make the motor bicycle dangerous to ride o/s fork pinch bolts lose |6.2.1h| | 1 |
| Front Brake cylinder insecurely mounted |3.2.B1a| | 1 |
| Front Front wheel spindle loose |2.3.3a| | 1 |
| Front wheel spindle securing nut|s| loose |2.3.3a| | 1 |
| Rear Brake disc|s| cracked |3.2.A1g| | 1 |
| Front Roller brake test indicates a binding brake |3.3.A1a| | 1 |
| Front Stop lamp not working (4.3.1 (a) (ii)) | 1 |
| Position lamp switch insecure |1.1.4b| | 1 |
| Stop lamp does not illuminate immediately a brake applies rear brake |1.3.1a| | 1 |
| Steering control fouling between components which interferes with the free movement of the steering |2.1.2a| | 1 |
| Offside Handlebar handgrip not secure to handlebars. |2.1.1c| | 1 |
| Lower Rear suspension bush has excessive free play |2.4.A2a|i|| | 1 |
| Locking device|s| not correctly fitted which may make the motor bicycle dangerous to ride |6.2.1h| | 1 |
| Fuel system component leaking |7.2.1a| | 1 |
| Headlamp dipped beam affected by the operation of another lamp |1.2.2c| | 1 |
| Steering control handlebar movement restricted by trapped cables |2.1.2c| | 1 |
| Rear suspension bearing has excessive free play |2.4.A2a|i|| | 1 |
| Direction indicators not working |1.5.1c| | 1 |
| Headlamp aim not tested |1.6| | 1 |
| Fuel cap sealing washer missing |7.2.2c| | 1 |
| Front position lamp does not illuminate immediately when switched on side light |1.1.3a| | 1 |
| Locking devices not correctly fitted which may make the motor bicycle dangerous to ride |6.2.1h| | 1 |
| Rear suspension component loose |2.4.A.1a| | 1 |
| Front wheel spindle securing nut locking device insecure |2.3.5a| | 1 |
| Rear Footrest missing |6.2.1a| | 1 |
| Roller brake test No brake control achieves an efficiency of 30%. |3.3.A2a| | 1 |
| Rear Rear reflector on motorcycle missing |1.4.1| | 1 |
| Front Rear wheel bearings have excessive free play |2.4.A.2c| | 1 |
| Rear Rear wheel bearings have excessive free play |2.4.A.2c| | 1 |
| Headlamp not working on dipped beam (4.1.1 (a) (ii)) | 1 |
| Horn not loud enough to be heard by another road user |1.7.3a| | 1 |
| Rear Rear shock absorber has inadequate damping effect. |2.4.A.3b| | 1 |
| Stop lamp missing |1.3.3a| | 1 |
| Front Stop lamp not working |4.3.1 |a| |ii|| | 1 |
| Drive chain worn to excess |6.1.7 |c| |i|| | 1 |
| Indicator switch does not operate the direction indicators on the side selected |1.5.4| | 1 |
| Brake pedal is inoperative |3.1.3c| | 1 |
| Front Brake indicates excessive fluctuation of brake effort 30kgf fluctuation at constant pressure - warped disc |1.2.1 |e|| | 1 |
| Rear Brake component modification unsafe rear brake hyd line is too long and insecure |1.1.21 |d| |i|| | 1 |
| Drive chain so loose it is likely to fail |6.1.7 |c| |ii|| | 1 |
| Steering headbearing has excessive wear or free play |2.2.2 |f| |i|| | 1 |
| Front Direction indicator not working |1.5.1c| | 1 |
| Plate brake test The less effective brake control does not achieve an efficiency of 25%. |3.3.B2b| | 1 |
| Rear wheel rotation likely to be impeded |6.2.1b| | 1 |
| Front Brake disc|s| friction surface contaminated by oil or grease |3.2.A1k| | 1 |
| Rear Brake pedal has inadequate reserve travel |3.1.3b| | 1 |
| Horn not working |7.7 |a| |ii|| | 1 |
| Rear Brake component defective due to a deliberate modification which significantly reduces the original strength |3.1.5| | 1 |
| Rear Brake hose is likely to be fouled or trapped by moving parts |3.2.B2c| | 1 |
| Dipswitch does not deflect the main beam/s, making them into dipped beam/s |1.2.2b|ii|| | 1 |
| Headlamp aim headlamp deteriorated and function impaired |1.2.3a| | 1 |
| Offside Rear Lower Roller brake test indicates excessive fluctuation of brake effort |3.3.A1d| | 1 |
| Fairings insecure and likely to impede the steering |2.1.2e| | 1 |
| Nearside Headlamp switch insecure |1.2.4| | 1 |
| Headlamp not working on main beam (4.1.1 (a) (ii)) | 1 |
| Nearside Front Direction indicator not working (4.4.1 (a) (ii)) | 1 |
| Nearside Rear Direction indicator not working |4.4.1 |a| |ii|| | 1 |
| Rear Roller brake test indicates a severely grabbing brake |3.3.A1b| | 1 |
| Rear Brake master cylinder fluid level dangerously low |3.2.B1d| | 1 |
| Rear Drive chain sprocket carrier worn to excess |6.2.1e| | 1 |
| Clutch lever positioned so it cannot be readily operated. |6.2.1g| | 1 |
| Rear Brake pedal is bent and the brake cannot be readily applied |3.1.3c| | 1 |
| Front position lamp does not illuminate immediately when switched on |1.1.3a| | 1 |
| Front shock absorber seal failed and leaking oil |2.3.3| | 1 |
| Centre Rear Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 1 |
| Horn control not functioning. |1.7.2b| | 1 |
| Rear reflector missing (4.8.2 (a) (ii)) | 1 |