| Most common failures | No# failures |
|---|
| Horn not working |1.7.3a| | 6 |
| Horn not loud enough to be heard by another road user |1.7.3a| | 6 |
| Headlamp at least one does not illuminate on dipped beam |1.2.2a|i|| | 5 |
| Exhaust is leaking and excessively noisey |7.1.1b| | 5 |
| Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 4 |
| Front Brake lever has inadequate reserve travel |3.1.3b| | 4 |
| Nearside Rear Direction indicator flashing less than 60 times a minute |1.5.1c| | 3 |
| Roller brake test The less effective brake control does not achieve an efficiency of 25%. |3.3.A2b| | 3 |
| Offside Rear Direction indicator flashing less than 60 times a minute |1.5.1c| | 3 |
| Rear Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 3 |
| Stop lamp affected by the operation of another lamp |1.3.2| | 3 |
| Direction indicators affected by the operation of another lamp |1.5.1c| | 3 |
| Direction indicators not working |1.5.1c| | 2 |
| Front Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 2 |
| Headlamp aim out of alignment | 2 |
| Rear shock absorber has inadequate damping effect. |2.4.A.3b| | 2 |
| Direction indicator affected by the operation of another lamp |1.5.1c| | 2 |
| Nearside Direction indicator flashing less than 60 times a minute |1.5.1c| | 2 |
| Steering headbearing has excessive free play |2.2.2| | 2 |
| Direction indicators flashing less than 60 times a minute |1.5.1c| | 2 |
| Rear Brake pedal has inadequate reserve travel |3.1.3b| | 2 |
| Direction indicator flashing less than 60 times a minute |1.5.1c| | 2 |
| Nearside Front Direction indicator flashing less than 60 times a minute |1.5.1c| | 2 |
| Offside Front Direction indicator flashing less than 60 times a minute |1.5.1c| | 2 |
| Brake pedal has inadequate reserve travel |3.1.3b| | 2 |
| Front Floor brake test indicates a sticking brake |3.3.C2c| | 2 |
| Nearside Front Direction indicator not working |1.5.1c| | 2 |
| Front Brake lever is damaged and the brake cannot be readily applied |3.1.3c| | 1 |
| Front Stop lamp remains on when the brake is released |1.3.1e| | 1 |
| Nearside Direction indicators affected by the operation of another lamp |1.5.1c| | 1 |
| Offside Direction indicators affected by the operation of another lamp |1.5.1c| | 1 |
| Front Brake lever mounting cracked |3.1.2c| | 1 |
| Rear Wheel spoke missing |4.2.1b| | 1 |
| Front Headlamp at least one does not illuminate on dipped beam |1.2.2a|i|| | 1 |
| Front Riders seat insecure |6.2.1a| | 1 |
| Offside Direction indicator not working |1.5.1c| | 1 |
| Rear Brake locking device insecure |3.2.A1e| | 1 |
| Steering movement excessively `notchy` with the weight on the lower bearing |2.2.1a| | 1 |
| Front Brake lever cannot be applied smoothly |3.1.3d| | 1 |
| Front Brake lever cannot be released smoothly |3.1.3d| | 1 |
| Front Front suspension spring worn and seriously weakened |2.3.2b| | 1 |
| Rear Rear reflector on motorcycle obscured |1.4.1| | 1 |
| Rear Direction indicator light intensity significantly reduced (4.4.3 (a)) | 1 |
| Handlebar mounting clamp loose |2.1.1a| | 1 |
| Front position lamp does not illuminate immediately when switched on |1.1.3a| | 1 |
| Nearside Direction indicators not working |1.5.1c| | 1 |
| Offside Direction indicators not working |1.5.1c| | 1 |
| Front Front suspension assembly has excessive free play in the pivot bearings. |2.3.2| | 1 |
| Nearside Rear Direction indicators not working |1.5.1c| | 1 |
| Offside Front Direction indicators flashing more than 120 times per minute |1.5.1c| | 1 |
| Front Horn is not continous or uniform |1.7.3c| | 1 |
| Exhaust excessively deteriorated |7.1.1a| | 1 |
| Front Brake pedal cannot be released smoothly |3.1.3d| | 1 |
| Rear Direction indicator flashing less than 60 times a minute |1.5.1c| | 1 |
| Nearside Rear shock absorber has inadequate damping effect. |2.4.A.3b| | 1 |
| Rear Rear reflector on motorcycle deteriorated and function impaired |1.4.2a| | 1 |
| Rear reflector on motorcycle missing |1.4.1| | 1 |
| Offside Rear shock absorber has inadequate damping effect. |2.4.A.3b| | 1 |
| Riders seat insecure |6.2.1a| | 1 |
| Offside Brake lever has inadequate reserve travel |3.1.3b| | 1 |
| Front Direction indicators affected by the operation of another lamp |1.5.1c| | 1 |
| Registration plate issues | 1 |
| Offside Rear Lower Brake lining|s| less than 1.5 mm thick |3.2.A1f|i|| | 1 |
| Offside Front Lower Exhaust is leaking and excessively noisey |7.1.1b| | 1 |
| Rear position lamp does not illuminate immediately when it is switched on |1.1.3a| | 1 |
| Front Exhaust is leaking and excessively noisey |7.1.1b| | 1 |
| Rear Brake reaction bracket insecure |3.2.A1j| | 1 |
| Handlebar deformed |2.1.1b| | 1 |
| Offside Front Direction indicator flashing more than 120 times per minute |1.5.1c| | 1 |
| Nearside Rear Direction indicator flashing more than 120 times per minute |1.5.1c| | 1 |
| Offside Rear Direction indicator flashing more than 120 times per minute |1.5.1c| | 1 |
| Roller brake test indicates a sticking brake |3.3.A1a| | 1 |
| Front wheel spindle securing nut locking device missing |2.3.3a| | 1 |
| Front Roller brake test indicates a sticking brake |3.3.A1a| | 1 |
| Steering linkage has excessive free play |2.2.2| | 1 |
| Rear suspension bush has excessive free play |2.4.A2a|i|| | 1 |
| Nearside Rear Direction indicator not working |1.5.1c| | 1 |
| Front position lamp adversely affected by the operation of another lamp |1.1.3b| | 1 |
| Decelerometer brake test no brake control achieves an efficiency of 30% |3.3.E1a| | 1 |
| Decelerometer brake test neither brake control achieves an efficiency of 25% |3.3.E1c| | 1 |
| Front Direction indicators not working |1.5.1c| | 1 |
| Rear Direction indicators not working |1.5.1c| | 1 |
| Front wheel spindle securing nut locking device missing |2.3.5a| | 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 |
| Exhaust noise is clearly in excess of that emitted by a similar motor bicycle fitted with a standard silencer in average condition |7.1.2| | 1 |