| Most common failures | No# failures |
|---|
| Rear shock absorber has inadequate damping effect. |2.4.A.3b| | 13 |
| Registration plate issues | 11 |
| Headlamp aim out of alignment | 11 |
| Rear reflector on motorcycle missing |1.4.1| | 10 |
| Horn not working |1.7.3a| | 10 |
| Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 7 |
| Rear suspension bush has excessive free play |2.4.A2a|i|| | 6 |
| Drive chain excessively loose |6.2.1d| | 5 |
| Rear position lamp does not illuminate immediately when it is switched on |1.1.3a| | 4 |
| Headlamp at least one does not illuminate on dipped beam |1.2.2a|i|| | 3 |
| Horn not loud enough to be heard by another road user |1.7.3a| | 3 |
| Direction indicators not working |1.5.1c| | 3 |
| Stop lamp remains on when the brake is released |1.3.1e| | 2 |
| Front Headlamp at least one does not illuminate on dipped beam |1.2.2a|i|| | 2 |
| Rear Rear shock absorber has inadequate damping effect. |2.4.A.3b| | 2 |
| Front Roller brake test indicates a binding brake |3.3.A1a| | 2 |
| Nearside Rear Direction indicator not working |1.5.1c| | 2 |
| Rear Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 2 |
| Nearside Rear Direction indicators not working |1.5.1c| | 2 |
| Headlamp at least one does not illuminate on main beam |1.2.2a|ii|| | 2 |
| Rear Rear suspension bush has excessive free play |2.4.A2a|i|| | 2 |
| Rear Brake pedal has inadequate reserve travel |3.1.3b| | 2 |
| Wheel alignment incorrect which adversely affects the handling |2.5.1| | 2 |
| Front suspension assembly excessive wear or free play in a front suspension component |2.3.4| | 2 |
| Rear position lamp incorrect colour |1.1.2b| | 2 |
| Front position lamp does not illuminate immediately when switched on |1.1.3a| | 2 |
| Nearside Handlebar handgrip not secure to handlebars. |2.1.1c| | 1 |
| Offside Handlebar handgrip not secure to handlebars. |2.1.1c| | 1 |
| Nearside Direction indicator damaged and function impaired |1.5.3a| | 1 |
| Offside Direction indicator damaged and function impaired |1.5.3a| | 1 |
| Headlamp switch faulty |1.2.4| | 1 |
| Headlamp incorrect colour |1.2.1| | 1 |
| Offside Front Direction indicator not working |1.5.1c| | 1 |
| Offside Rear Direction indicator not working |1.5.1c| | 1 |
| Brake hose fouling |3.2.B3b| | 1 |
| Centre Front Front suspension has inadequate damping effect. |2.3.6c| | 1 |
| Centre Front Riders seat insecure |6.2.1a| | 1 |
| Front Front position lamp does not illuminate immediately when switched on |1.1.3a| | 1 |
| Front Headlamp at least one does not illuminate on main beam |1.2.2a|ii|| | 1 |
| Steering movement excessively `notchy` with the wheel raised |2.2.1b| | 1 |
| Headlamp aim beam image kick up to the offside |1.6| | 1 |
| Rear suspension component loose |2.4.A.1a| | 1 |
| Horn is not continous or uniform |1.7.3c| | 1 |
| Steering headbearing has excessive wear or free play |2.2.2 |f| |i|| | 1 |
| Front Front position lamp adversely affected by the operation of another lamp |1.1.3b| | 1 |
| Steering lock stop maladjusted |2.1.3| | 1 |
| Steering movement excessively rough with the weight on the lower bearing |2.2.1a| | 1 |
| Nearside Direction indicator flashing more than 120 times per minute |1.5.1c| | 1 |
| Offside Direction indicator flashing more than 120 times per minute |1.5.1c| | 1 |
| Headlamp insecure |1.2.3b| | 1 |
| Fuel cap sealing washer missing |7.2.2c| | 1 |
| Fuel system component insecure |7.2.1b| | 1 |
| Offside Front Steering lock stop ineffective |2.1.3| | 1 |
| Front position lamp insecure |1.1.1c| | 1 |
| Handlebar mounting clamp bolt loose |2.1.1a| | 1 |
| Front Front mudguard can easily contact any fixed point of the motor bicycle. |2.3.7| | 1 |
| Centre Rear Upper Rear position lamp does not illuminate immediately when it is switched on |1.1.3a| | 1 |
| Centre Rear Upper Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 1 |
| Exhaust is leaking and excessively noisey |7.1.1b| | 1 |
| Throttle operating incorrectly |6.2.1f| | 1 |
| Locking device|s| not correctly fitted which may make the motor bicycle dangerous to ride |6.2.1h| | 1 |
| Drive chain worn to excess |6.2.1e| | 1 |
| Front Brake disc|s| has excessive run out |3.2.A1m| | 1 |
| Front Brake caliper|s| securing bolt|s| missing |3.2.A1j| | 1 |
| Offside Front shock absorber seal failed and leaking oil |2.3.3| | 1 |
| Offside Direction indicators flashing more than 120 times per minute |1.5.1c| | 1 |
| Headlamp main beam affected by the operation of another lamp |1.2.2c| | 1 |
| Stop lamp emits other than a steady red light |1.3.1b| | 1 |
| Stop lamp affected by the operation of the horn |1.3.2| | 1 |
| Nearside Rear Direction indicator insecure |1.5.3b| | 1 |
| Rear Floor brake test indicates a sticking brake |3.3.C2c| | 1 |
| Rear Stop lamp does not emit a steady light |1.3.1b| | 1 |
| Front Wheel has an excessively distorted bead rim. |4.2.2| | 1 |
| Direction indicators affected by the operation of another lamp |1.5.1c| | 1 |
| Horn sounds harsh or grating |1.7.3c| | 1 |
| Nearside Front Front suspension has inadequate damping effect. |2.3.6c| | 1 |
| Offside Front Front suspension has inadequate damping effect. |2.3.6c| | 1 |
| Nearside Front Footrest insecure |6.2.1a| | 1 |
| Offside Front Footrest insecure |6.2.1a| | 1 |
| Offside Brake pedal is bent and the brake cannot be readily applied |3.1.3c| | 1 |
| Rear Wheel spoke excessively loose |4.2.1b| | 1 |
| Fuel cap sealing washer deteriorated |7.2.2c| | 1 |
| Front Headlamp dipped beam affected by the operation of another lamp |1.2.2c| | 1 |
| Front Headlamp aim headlamp deteriorated and function impaired |1.2.3a| | 1 |
| Horn control not readily accesible. |1.7.2a| | 1 |
| Front Brake lever has inadequate reserve travel |3.1.3b| | 1 |
| Rear Rear reflector on motorcycle missing |1.4.1| | 1 |
| Direction indicator affected by the operation of another lamp |1.5.1c| | 1 |
| Rear Stop lamp affected by the operation of another lamp |1.3.2| | 1 |
| Front Headlamp main beam affected by the operation of another lamp |1.2.2c| | 1 |
| Brake lever has inadequate reserve travel |3.1.3b| | 1 |
| Horn control defective |1.7.2a| | 1 |
| Rear Motorcycle structure insecure and likely to affect the correct functioning of the steering or braking |6.1.1c| | 1 |
| Front Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 1 |
| Rear Brake pedal is bent and the brake cannot be readily applied |3.1.3c| | 1 |
| Offside Rear Direction indicators not working |1.5.1c| | 1 |
| Offside Footrest missing |6.2.1a| | 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 indicator missing |1.5.1a| | 1 |
| Rear position lamp adversely affected by the operation of another lamp |1.1.3b| | 1 |
| Steering movement excessively stiff with the wheel raised |2.2.1b| | 1 |
| Handlebar mounting clamp loose |2.1.1a| | 1 |
| Roller brake test The less effective brake control does not achieve an efficiency of 25%. |3.3.A2b| | 1 |
| Steering movement excessively stiff with the weight on the lower bearing |2.2.1a| | 1 |
| Steering movement excessively `notchy` with the weight on the lower bearing |2.2.1a| | 1 |
| Rear suspension fouling which affects the movement of the rear suspension |2.4.A.3a| | 1 |
| Rear suspension bush excessively deteriorated |2.4.A2a|i|| | 1 |
| Front suspension assembly component missing Top nut missing |2.3.1| | 1 |
| Offside Front Brake lever cannot be applied smoothly |3.1.3d| | 1 |
| Rear reflector missing (4.8.2 (a) (ii)) | 1 |
| Front Brake master cylinder defective but brake still operating front brake spongey (1.1.10 (b) (i)) | 1 |
| Suspension arm pin or bush likely to become detached excess wear and lock nut missing (5.3.4 (a) (ii)) | 1 |
| Nearside Front Direction indicator not working (4.4.1 (a) (ii)) | 1 |
| Decelerometer brake test Neither brake control achieves an efficiency of 25% (1.2.2 (a) (i)) | 1 |
| Headlamp not working on dipped beam (4.1.1 (a) (ii)) | 1 |
| Rear Position lamp not working (4.2.1 (a)) | 1 |
| Offside Front Stop lamp not working switch faulty (4.3.1 (a) (ii)) | 1 |