| Most common failures | No# failures |
|---|
| Headlamp aim out of alignment | 10 |
| Headlamp aim beam image kick up to the offside |1.6| | 7 |
| Nearside Front shock absorber seal failed and leaking oil |2.3.3| | 5 |
| Rear Brake lever has inadequate reserve travel |3.1.3b| | 5 |
| Rear shock absorber has inadequate damping effect. |2.4.A.3b| | 4 |
| Roller brake test The less effective brake control does not achieve an efficiency of 25%. |3.3.A2b| | 3 |
| Horn not loud enough to be heard by another road user |1.7.3a| | 3 |
| Front wheel bearings have excessive free play |2.3.5b| | 3 |
| Registration plate issues | 3 |
| Front Brake disc|s| friction surface contaminated by oil or grease |3.2.A1k| | 3 |
| Rear Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 3 |
| Steering movement excessively `notchy` with the wheel raised |2.2.1b| | 2 |
| Front Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 2 |
| Stop lamp affected by the operation of another lamp |1.3.2| | 2 |
| Direction indicator flashing more than 120 times per minute |1.5.1c| | 2 |
| Steering headbearing has excessive free play |2.2.2| | 2 |
| Rear wheel bearings have excessive free play |2.4.A.2c| | 2 |
| Exhaust is leaking and excessively noisey |7.1.1b| | 2 |
| Offside Front shock absorber seal failed and leaking oil |2.3.3| | 2 |
| Rear Brake lining|s| less than 1.5 mm thick |3.2.A1f|i|| | 2 |
| Front wheel bearings are excessively rough |2.3.5b| | 2 |
| Direction indicators flashing more than 120 times per minute |1.5.1c| | 2 |
| Steering movement excessively rough with the weight on the lower bearing |2.2.1a| | 1 |
| Rear wheel rotation likely to be impeded |6.2.1b| | 1 |
| Direction indicators affected by the operation of another lamp |1.5.1c| | 1 |
| Direction indicators flashing less than 60 times a minute |1.5.1c| | 1 |
| Rear position lamp adversely affected by the operation of another lamp |1.1.3b| | 1 |
| Rear wheel has a loose wheel nut|s| |4.2.3a| | 1 |
| Front Brake disc|s| excessively pitted |3.2.A1l| | 1 |
| Rear Fairings insecure and likely to impede the steering |2.1.2e| | 1 |
| Front Headlamp aim beam image kick up to the offside |1.6| | 1 |
| Rear Roller brake test indicates brake effort rise disproportional to brake lever or pedal effort |3.3.A1c| | 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 |
| Offside Lower Locking devices not correctly fitted which may make the motor bicycle dangerous to ride |6.2.1h| | 1 |
| Nearside Rear Direction indicator not working |1.5.1c| | 1 |
| Front Motorcycle structure excessively damaged |6.1.1a| | 1 |
| Rear Brake disc|s| insecure |3.2.A1g| | 1 |
| Front Roller brake test indicates excessive fluctuation of brake effort |3.3.A1d| | 1 |
| Headlamp aim beam image kick-up is to the offside |1.6.1| | 1 |
| Front Steering movement excessively stiff with the weight on the lower bearing |2.2.1a| | 1 |
| Front Steering headbearing has excessive free play |2.2.2| | 1 |
| Front position lamp does not illuminate immediately when switched on |1.1.3a| | 1 |
| Rear Exhaust is leaking and excessively noisey |7.1.1b| | 1 |
| Roller brake test No brake control achieves an efficiency of 30%. |3.3.A2a| | 1 |
| Throttle operating incorrectly |6.2.1f| | 1 |
| Rear Brake lever is inoperative |3.1.3c| | 1 |
| Rear Brake hose is likely to be fouled or trapped by moving parts |3.2.B2c| | 1 |
| Roller brake test Neither brake control achieves an efficiency of 25% |3.3.A2b| | 1 |
| Brake lever has inadequate reserve travel |3.1.3b| | 1 |
| Offside Front Brake lever has inadequate reserve travel |3.1.3b| | 1 |
| Stop lamp remains on when the brake is released |1.3.1e| | 1 |
| Rear Front mudguard insecure |2.3.7| | 1 |
| Headlamp switch faulty |1.2.4| | 1 |
| Front Brake locking device missing |3.2.A1e| | 1 |
| Front suspension assembly component excessively bent |2.3.1| | 1 |
| Rear position lamp adversely affected by the operation of the horn |1.1.3b| | 1 |
| Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 1 |
| Horn sounds harsh or grating |1.7.3c| | 1 |
| Headlamp at least one does not illuminate on dipped beam |1.2.2a|i|| | 1 |
| Rear reflector on motorcycle missing |1.4.1| | 1 |
| Front Front shock absorber seal failed and leaking oil |2.3.3| | 1 |
| Offside Rear Direction indicator damaged and function impaired |1.5.3a| | 1 |
| Rear Stop lamp affected by the operation of another lamp |1.3.2| | 1 |
| Nearside Rear Rear shock absorber has inadequate damping effect. |2.4.A.3b| | 1 |