| Most common failures | No# failures |
|---|
| Registration plate issues | 13 |
| Headlamp aim beam image kick up to the offside |1.6| | 9 |
| Rear reflector on motorcycle missing |1.4.1| | 8 |
| Headlamp aim out of alignment | 8 |
| Horn not working |1.7.3a| | 4 |
| Front position lamp does not illuminate immediately when switched on |1.1.3a| | 3 |
| Headlamp aim headlamp deteriorated and function impaired |1.2.3a| | 2 |
| Rear position lamp does not illuminate immediately when it is switched on |1.1.3a| | 2 |
| Offside Rear Direction indicator not working |1.5.1c| | 2 |
| Front Wheel excessively distorted |5.2.2 |c| |i|| | 1 |
| Drive chain excessively loose |6.2.1d| | 1 |
| Rear Brake disc|s| insecure |3.2.A1g| | 1 |
| Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 1 |
| Headlamp at least one does not illuminate on dipped beam |1.2.2a|i|| | 1 |
| Offside Direction indicator flashing more than 120 times per minute |1.5.1c| | 1 |
| Stop lamp does not illuminate immediately a brake applies front lever |1.3.1a| | 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 |
| Nearside Front Direction indicator not working |1.5.1c| | 1 |
| Front Wheel has an excessively distorted bead rim. |4.2.2| | 1 |
| Offside Rear Direction indicator not working |4.4.1 |a| |ii|| | 1 |
| Steering movement excessively stiff with the wheel raised |2.2.1b| | 1 |
| Offside Front Direction indicator not working |1.5.1c| | 1 |
| Offside Rear Direction indicator flashing less than 60 times a minute |1.5.1c| | 1 |
| Position lamp switch insecure |1.1.4b| | 1 |
| Headlamp switch insecure |1.2.4| | 1 |
| Indicator switch insecure |1.5.4| | 1 |
| Locking device|s| not correctly fitted which may make the motor bicycle dangerous to ride |6.2.1h| | 1 |
| Stop lamp remains on when the brake is released |1.3.1e| | 1 |
| Rear Rear position lamp does not illuminate immediately when it is switched on |1.1.3a| | 1 |
| Front Roller brake test indicates excessive fluctuation of brake effort |3.3.A1d| | 1 |
| Front Roller brake test indicates a binding brake |3.3.A1a| | 1 |
| Rear Motorcycle structure insecure and likely to affect the correct functioning of the steering or braking |6.1.1c| | 1 |
| Horn not loud enough to be heard by another road user |1.7.3a| | 1 |
| Offside Rear Brake pedal has inadequate reserve travel |3.1.3b| | 1 |
| Roller brake test The less effective brake control does not achieve an efficiency of 25%. |3.3.A2b| | 1 |
| Wheel alignment incorrect which adversely affects the handling |2.5.1| | 1 |
| Front Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 1 |
| Nearside Rear Direction indicator not working |1.5.1c| | 1 |
| Riders seat insecure |6.2.1a| | 1 |
| Offside Rear Direction indicators not working |1.5.1c| | 1 |