| Most common failures | No# failures |
|---|
| Offside Handlebar handgrip not secure to handlebars. |2.1.1c| | 4 |
| Nearside Handlebar handgrip not secure to handlebars. |2.1.1c| | 4 |
| Rear reflector on motorcycle missing |1.4.1| | 3 |
| Headlamp aim out of alignment | 3 |
| Drive chain excessively loose |6.2.1d| | 3 |
| Rear Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 3 |
| Rear reflector on motorcycle obscured |1.4.1| | 3 |
| Steering movement excessively `notchy` with the wheel raised |2.2.1b| | 3 |
| Headlamp at least one does not illuminate on dipped beam |1.2.2a|i|| | 3 |
| Offside Rear Locking devices not correctly fitted which may make the motor bicycle dangerous to ride |6.2.1h| | 2 |
| Direction indicators affected by the operation of another lamp |1.5.1c| | 2 |
| Front Headlamp at least one does not illuminate on dipped beam |1.2.2a|i|| | 2 |
| Rear Drive chain sprocket worn to excess |6.2.1e| | 2 |
| Front Direction indicator affected by the operation of another lamp |1.5.1c| | 2 |
| Locking device|s| not correctly fitted which may make the motor bicycle dangerous to ride |6.2.1h| | 2 |
| Roller brake test The less effective brake control does not achieve an efficiency of 25%. |3.3.A2b| | 2 |
| Front Front wheel bearings have excessive free play |2.3.5b| | 2 |
| Front All position lamps do not illuminate immediately when switched on |1.1.3a| | 2 |
| Offside Front Direction indicator insecure |1.5.3b| | 2 |
| Rear Brake locking device missing |3.2.A1e| | 2 |
| Front Steering movement excessively `notchy` with the wheel raised |2.2.1b| | 1 |
| Front Steering movement excessively stiff with the wheel raised |2.2.1b| | 1 |
| Front Exhaust is leaking and excessively noisey |7.1.1b| | 1 |
| Front Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 1 |
| Rear Rear position lamp does not illuminate immediately when it is switched on |1.1.3a| | 1 |
| Steering movement excessively `notchy` with the weight on the lower bearing |2.2.1a| | 1 |
| Front position lamp damaged and function impaired |1.1.1b| | 1 |
| Drive chain sprocket carrier worn to excess |6.2.1e| | 1 |
| Rear Locking device|s| not correctly fitted which may make the motor bicycle dangerous to ride |6.2.1h| | 1 |
| Front wheel bearings have excessive free play |2.3.5b| | 1 |
| Drive chain excessively tight |6.2.1d| | 1 |
| Rear Brake lining|s| less than 1.5 mm thick |3.2.A1f|i|| | 1 |
| Wheel alignment incorrect which adversely affects the handling |2.5.1| | 1 |
| Horn not working |1.7.3a| | 1 |
| Brake pedal cannot be applied smoothly |3.1.3d| | 1 |
| Centre Headlamp at least one does not illuminate on dipped beam |1.2.2a|i|| | 1 |
| Horn not loud enough to be heard by another road user |1.7.3a| | 1 |
| Front Brake lever has inadequate reserve travel |3.1.3b| | 1 |
| Rear Brake reaction bracket securing bolt|s| loose |3.2.A1j| | 1 |
| Rear Brake reaction bracket insecure |3.2.A1j| | 1 |
| Offside Front Direction indicators not working |1.5.1c| | 1 |
| Front Direction indicators affected by the operation of another lamp |1.5.1c| | 1 |
| Steering headbearing has excessive free play |2.2.2| | 1 |
| Front suspension assembly component excessively misaligned |2.3.1| | 1 |
| Nearside Front suspension has excessive stiffness in the suspension movement. |2.3.6b| | 1 |
| Offside Front suspension has excessive stiffness in the suspension movement. |2.3.6b| | 1 |
| Front Front position lamp adversely affected by the operation of another lamp |1.1.3b| | 1 |
| Offside Rear Direction indicators not working |1.5.1c| | 1 |
| Headlamp insecure |1.2.3b| | 1 |
| Headlamp main beam affected by the operation of another lamp |1.2.2c| | 1 |
| Front position lamp does not illuminate immediately when switched on |1.1.3a| | 1 |
| Brake pedal has inadequate reserve travel |3.1.3b| | 1 |
| Brake pedal pivots excessively worn |3.1.3a| | 1 |
| Front suspension has inadequate damping effect. |2.3.6c| | 1 |
| Front Front position lamp deteriorated and function impaired |1.1.1b| | 1 |
| Front Roller brake test indicates a binding brake |3.3.A1a| | 1 |
| Front Stop lamp remains on when the brake is released |1.3.1e| | 1 |
| Rear Roller brake test indicates a binding brake |3.3.A1a| | 1 |
| Rear wheel spindle securing nut locking device missing |2.4.A.2b| | 1 |
| Wheel alignment incorrect which adversely affects the steering |2.5.1| | 1 |
| Front Motorcycle structure excessively distorted |6.1.1a| | 1 |
| Rear wheel bearings have excessive free play |2.4.A.2c| | 1 |
| Steering movement excessively stiff with the weight on the lower bearing |2.2.1a| | 1 |
| Front Roller brake test indicates brake effort fall disproportional to brake lever or pedal effort |3.3.A1c| | 1 |
| Inner Front Headlamp at least one does not illuminate on dipped beam |1.2.2a|i|| | 1 |
| Front Front suspension has inadequate damping effect. |2.3.6c| | 1 |
| Front Roller brake test indicates a sticking brake |3.3.A1a| | 1 |
| All position lamps adversely affected by the operation of another lamp |1.1.3b| | 1 |
| All position lamps adversely affected by the operation of the horn |1.1.3b| | 1 |
| Horn emits 2 or more alternating tones |1.7.3b| | 1 |
| Nearside Front Locking devices not correctly fitted which may make the motor bicycle dangerous to ride |6.2.1h| | 1 |
| Footrest insecure |6.2.1a| | 1 |
| Motorcycle structure excessively distorted |6.1.1a| | 1 |
| Motorcycle structure adversely modified |6.1.1b| | 1 |
| Brake component has restricted free movement and operation is likely to be impeded |3.2.A1h| | 1 |
| Motorcycle structure cracked |6.1.1a| | 1 |
| Handlebar handgrip not secure to handlebars. |2.1.1c| | 1 |
| Handlebar deformed |2.1.1b| | 1 |
| Front Front position lamp does not illuminate immediately when switched on |1.1.3a| | 1 |
| Nearside Front Direction indicator insecure |1.5.3b| | 1 |
| Registration plate issues | 1 |
| Rear Drive chain excessively loose |6.2.1d| | 1 |
| Rear Brake pedal has inadequate reserve travel |3.1.3b| | 1 |