| Most common failures | No# failures |
|---|
| Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 5 |
| Rear position lamp does not illuminate immediately when it is switched on |1.1.3a| | 4 |
| Headlamp aim out of alignment | 4 |
| Horn not working |1.7.3a| | 3 |
| Headlamp dipped beam affected by the operation of another lamp |1.2.2c| | 3 |
| Front Direction indicators not working |1.5.1c| | 2 |
| Front Wheel spoke excessively loose |4.2.1b| | 2 |
| Direction indicators not working |1.5.1c| | 2 |
| Headlamp main beam affected by the operation of another lamp |1.2.2c| | 2 |
| Wheel alignment incorrect which adversely affects the handling |2.5.1| | 2 |
| Headlamp at least one does not illuminate on main beam |1.2.2a|ii|| | 1 |
| All position lamps do not illuminate immediately when switched on |1.1.3a| | 1 |
| Horn is not continous or uniform |1.7.3c| | 1 |
| Rear wheel spindle securing nut locking device missing |2.4.A.2b| | 1 |
| Handlebar deformed |2.1.1b| | 1 |
| Rear Rear shock absorber seal failed and leaking oil |2.4.A.1c| | 1 |
| Offside Rear shock absorber insecurely mounted |2.4.A.3b| | 1 |
| Central Front Headlamp at least one does not illuminate on dipped beam |1.2.2a|i|| | 1 |
| Rear Brake back plate|s| securing bolt|s| loose |3.2.A1j| | 1 |
| Front Front position lamp does not illuminate immediately when switched on |1.1.3a| | 1 |
| Headlamp not working on dipped beam |4.1.1 |a| |ii|| | 1 |
| Fuel system component leaking |6.1.3 |b| |i|| | 1 |
| Stop lamp adversely affected by the operation of another lamp |4.3.3 |b|| | 1 |
| Roller brake test The less effective brake control does not achieve an efficiency of 25% |1.2.2 |a| |i|| | 1 |
| Offside Front Direction indicator not working |1.5.1c| | 1 |
| Steering movement excessively `notchy` with the wheel raised |2.2.1b| | 1 |
| Locking devices not correctly fitted which may make the motor bicycle dangerous to ride |6.2.1h| | 1 |
| Headlamp aim not tested |1.6| | 1 |
| Rear Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 1 |
| Rear Direction indicators not working |1.5.1c| | 1 |
| Stop lamp affected by the operation of another lamp |1.3.2| | 1 |
| Drive chain worn to excess |6.2.1e| | 1 |
| Rear reflector missing (4.8.2 (a) (ii)) | 1 |
| Roller brake test The less effective brake control does not achieve an efficiency of 25%. |3.3.A2b| | 1 |
| Nearside Direction indicator not working |1.5.1c| | 1 |
| Offside Direction indicator not working |1.5.1c| | 1 |
| Rear reflector on motorcycle missing |1.4.1| | 1 |
| Headlamp at least one does not illuminate on dipped beam |1.2.2a|i|| | 1 |
| Stop lamp remains on when the brakes are released | 1 |
| Front Footrest insecure |6.2.1a| | 1 |
| Nearside Front Direction indicators flashing less than 60 times a minute |1.5.1c| | 1 |
| Offside Front Direction indicators flashing less than 60 times a minute |1.5.1c| | 1 |
| Nearside Rear Direction indicators flashing less than 60 times a minute |1.5.1c| | 1 |
| Offside Rear Direction indicators flashing less than 60 times a minute |1.5.1c| | 1 |
| Throttle operating incorrectly |6.2.1f| | 1 |
| Nearside Front Front shock absorber seal failed and leaking oil |2.3.3| | 1 |
| Offside Front Front shock absorber seal failed and leaking oil |2.3.3| | 1 |
| Brake pedal is damaged and the brake cannot be readily applied |3.1.3c| | 1 |
| Front Direction indicator flashing more than 120 times per minute |1.5.1c| | 1 |
| Rear Direction indicator flashing more than 120 times per minute |1.5.1c| | 1 |