| Most common failures | No# failures |
|---|
| Headlamp aim out of alignment | 14 |
| Registration plate issues | 10 |
| Front suspension has inadequate damping effect. |2.3.6c| | 6 |
| Rear reflector on motorcycle missing |1.4.1| | 5 |
| Headlamp insecure |1.2.3b| | 5 |
| Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 5 |
| Horn not working |1.7.3a| | 4 |
| Front Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 4 |
| Front Brake lever has inadequate reserve travel |3.1.3b| | 4 |
| Steering movement excessively `notchy` with the wheel raised |2.2.1b| | 3 |
| Rear Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 3 |
| Front position lamp does not illuminate immediately when switched on |1.1.3a| | 3 |
| 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| | 3 |
| Roller brake test The less effective brake control does not achieve an efficiency of 25%. |3.3.A2b| | 3 |
| Rear suspension bush has excessive free play |2.4.A2a|i|| | 3 |
| Steering movement excessively stiff with the wheel raised |2.2.1b| | 2 |
| Steering linkage has excessive free play |2.2.2| | 2 |
| Rear position lamp does not illuminate immediately when it is switched on |1.1.3a| | 2 |
| Steering headbearing has excessive free play |2.2.2| | 2 |
| Front Steering control fouling between components which interferes with the free movement of the steering |2.1.2a| | 2 |
| Nearside Front Direction indicator not working |1.5.1c| | 2 |
| Fuel cap does not fasten securely maintaining the sealing arrangement |7.2.2b| | 1 |
| Steering movement excessively stiff with the weight on the lower bearing |2.2.1a| | 1 |
| Rear wheel insecure |4.2.3b| | 1 |
| Front Front wheel bearings have excessive free play |2.3.5b| | 1 |
| Headlamp switch faulty |1.2.4| | 1 |
| Nearside Front Direction indicator incorrect colour |1.5.1b| | 1 |
| Offside Front Direction indicator incorrect colour |1.5.1b| | 1 |
| Wheel alignment incorrect which adversely affects the steering |2.5.1| | 1 |
| Steering movement excessively rough with the wheel raised |2.2.1b| | 1 |
| Front wheel bearings have excessive free play |2.3.5b| | 1 |
| Steering movement excessively `notchy` with the weight on the lower bearing |2.2.1a| | 1 |
| Rear wheel bearings have excessive free play |2.4.A.2c| | 1 |
| Steering control handlebar movement restricted by taut cables |2.1.2c| | 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 |
| Rear Roller brake test indicates brake effort rise disproportional to brake lever or pedal effort |3.3.A1c| | 1 |
| Exhaust is leaking and excessively noisey |7.1.1b| | 1 |
| Front suspension assembly excessive wear or free play in a front suspension component |2.3.4| | 1 |
| Offside Brake lever has inadequate reserve travel |3.1.3b| | 1 |
| Brake performance not tested |3.3| | 1 |
| Rear Rear position lamp does not illuminate immediately when it is switched on |1.1.3a| | 1 |
| Direction indicators affected by the operation of another lamp |1.5.1c| | 1 |
| Stop lamp affected by the operation of another lamp |1.3.2| | 1 |
| Front Headlamp insecure |1.2.3b| | 1 |
| Front Headlamp dipped beam flickers when tapped lightly by hand |1.2.2c| | 1 |
| Front Headlamp main beam affected by the operation of another lamp |1.2.2c| | 1 |
| Rear Rear position lamp incorrect colour |1.1.2b| | 1 |
| Rear Rear reflector on motorcycle obscured |1.4.1| | 1 |
| Direction indicators flashing more than 120 times per minute (1.5.1c) | 1 |
| Offside Stop lamp does not illuminate immediately a brake applies brake switch |1.3.1a| | 1 |
| Headlamp at least one does not illuminate on main beam |1.2.2a|ii|| | 1 |
| Offside Rear Direction indicator not working |1.5.1c| | 1 |
| Rear position lamp insecure |1.1.1c| | 1 |
| Stop lamp does not emit a steady light |1.3.1b| | 1 |
| Front suspension assembly component excessively misaligned |2.3.1| | 1 |
| Front Wheel fixing missing |multiple fixings| |5.2.1 |a| |i|| | 1 |
| Rear Brake component insecure brake pin retainer |1.1.21 |c|| | 1 |
| Front wheel bearings are excessively rough |2.3.5b| | 1 |
| Rear wheel bearings are excessively rough |2.4.A.2c| | 1 |
| Front wheel has a loose wheel nut|s| |4.2.3a| | 1 |
| Rear wheel has a loose wheel nut|s| |4.2.3a| | 1 |
| Front Fairing so located that it is likely to impede the steering |2.1.2e| | 1 |
| Headlamp aim headlamp deteriorated and function impaired |1.2.3a| | 1 |
| Steering control handlebar movement restricted by trapped cables |2.1.2c| | 1 |
| Stop lamp emits other than a steady red light |1.3.1b| | 1 |
| Rear wheel has a missing wheel stud|s| |4.2.3a| | 1 |
| Stop lamp missing |1.3.3a| | 1 |
| Direction indicators flashing less than 60 times a minute |1.5.1c| | 1 |
| Handlebar mounting clamp bolt loose |2.1.1a| | 1 |
| Offside Front Direction indicators not working |1.5.1c| | 1 |
| Headlamp dipped beam flickers when tapped lightly by hand |1.2.2c| | 1 |
| Headlamp main beam flickers when tapped lightly by hand |1.2.2c| | 1 |
| Centre Front Horn not working |1.7.3a| | 1 |
| Rear Rear reflector on motorcycle missing |1.4.1| | 1 |
| Rear Stop lamp emits other than a steady red light |1.3.1b| | 1 |
| Fuel system component insecure |7.2.1b| | 1 |
| Rear Brake master cylinder leaking hydraulic fluid |3.2.B1e| | 1 |
| Rear position lamp incorrect colour |1.1.2b| | 1 |
| Stop lamp remains on when the brake is released |1.3.1e| | 1 |