| Most common failures | No# failures |
|---|
| Headlamp aim out of alignment | 14 |
| Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 5 |
| Headlamp at least one does not illuminate on dipped beam |1.2.2a|i|| | 4 |
| Headlamp at least one does not illuminate on main beam |1.2.2a|ii|| | 4 |
| Rear position lamp does not illuminate immediately when it is switched on |1.1.3a| | 4 |
| Horn not loud enough to be heard by another road user |1.7.3a| | 4 |
| Rear wheel spindle securing nut locking device missing |2.4.A.2b| | 3 |
| Direction indicators affected by the operation of another lamp |1.5.1c| | 3 |
| Locking device|s| not correctly fitted which may make the motor bicycle dangerous to ride |6.2.1h| | 3 |
| Horn not working |1.7.3a| | 3 |
| All position lamps adversely affected by the operation of another lamp |1.1.3b| | 3 |
| Stop lamp affected by the operation of another lamp |1.3.2| | 3 |
| Nearside Front shock absorber seal failed and leaking oil |2.3.3| | 2 |
| Steering movement excessively `notchy` with the wheel raised |2.2.1b| | 2 |
| Stop lamp deteriorated and function impaired |1.3.3a| | 2 |
| Rear position lamp deteriorated and function impaired |1.1.1b| | 2 |
| All position lamps do not illuminate immediately when switched on |1.1.3a| | 2 |
| Drive chain excessively tight |6.2.1d| | 2 |
| Front Front position lamp does not illuminate immediately when switched on |1.1.3a| | 2 |
| Drive chain excessively loose |6.2.1d| | 2 |
| Rear Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 2 |
| Front Wheel spoke excessively loose |4.2.1b| | 2 |
| Registration plate issues | 2 |
| Wheel alignment incorrect which adversely affects the handling |2.5.1| | 2 |
| Rear reflector on motorcycle missing |1.4.1| | 2 |
| Offside Front shock absorber seal failed and leaking oil |2.3.3| | 2 |
| Motorcycle structure insecure and likely to affect the correct functioning of the steering or braking |6.1.1c| | 1 |
| Direction indicators flashing more than 120 times per minute |1.5.1c| | 1 |
| Rear wheel rotation likely to be impeded |6.2.1b| | 1 |
| Brake lever insecure |3.1.2a| | 1 |
| Brake pedal cannot be applied smoothly |3.1.3d| | 1 |
| Stop lamp remains on when the brake is released |1.3.1e| | 1 |
| Direction indicators not working |1.5.1c| | 1 |
| Nearside Front Direction indicator flashing more than 120 times per minute |1.5.1c| | 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 |
| Rear Riders seat insecure |6.2.1a| | 1 |
| Front Rear wheel rotation likely to be impeded |6.2.1b| | 1 |
| Nearside Locking device|s| not correctly fitted which may make the motor bicycle dangerous to ride |6.2.1h| | 1 |
| Front position lamp does not illuminate immediately when switched on |1.1.3a| | 1 |
| Steering movement excessively stiff with the wheel raised |2.2.1b| | 1 |
| Rear Rear suspension component loose |2.4.A.1a| | 1 |
| Rear wheel spindle securing nut locking device insecure |2.4.A.2b| | 1 |
| Offside Front Direction indicator insecure |1.5.3b| | 1 |
| Locking devices not correctly fitted which may make the motor bicycle dangerous to ride |6.2.1h| | 1 |
| Headlamp switch faulty |1.2.4| | 1 |
| Centre Front Headlamp at least one does not illuminate on dipped beam |1.2.2a|i|| | 1 |
| Centre Front Upper Headlamp at least one does not illuminate on dipped beam |1.2.2a|i|| | 1 |
| Direction indicator flashing less than 60 times a minute |1.5.1c| | 1 |
| Centre Rear Upper Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 1 |
| Nearside Rear Lower Chain guard insecure |6.2.1c| | 1 |
| Nearside Front Direction indicators not working |1.5.1c| | 1 |
| Rear Brake component is excessively corroded |3.1.5| | 1 |
| Throttle operating incorrectly |6.2.1f| | 1 |
| Front wheel spindle securing nut locking device missing |2.3.5a| | 1 |
| Roller brake test The less effective brake control does not achieve an efficiency of 25%. |3.3.A2b| | 1 |
| Offside Front Direction indicators not working |1.5.1c| | 1 |
| Offside Front Direction indicator not working |1.5.1c| | 1 |
| Offside Rear Direction indicator not working |1.5.1c| | 1 |
| Steering headbearing has excessive free play |2.2.2| | 1 |
| Centre Front Upper Horn not working |1.7.3a| | 1 |
| Front suspension has inadequate damping effect. |2.3.6c| | 1 |
| Direction indicators flashing less than 60 times a minute |1.5.1c| | 1 |
| Rear Drive chain worn to excess |6.2.1e| | 1 |
| Rear Brake reaction bracket securing bolt|s| loose |3.2.A1j| | 1 |
| Direction indicator affected by the operation of another lamp |1.5.1c| | 1 |
| Direction indicator not working |1.5.1c| | 1 |
| Rear position lamp adversely affected by the operation of another lamp |1.1.3b| | 1 |
| Rear shock absorber seal failed and leaking oil |2.4.A.1c| | 1 |
| Throttle has a significant change in engine speed whilst moving the steering from lock to lock |2.1.4| | 1 |
| Rear Wheel has an excessively distorted bead rim. |4.2.2| | 1 |
| Rear shock absorber has inadequate damping effect. |2.4.A.3b| | 1 |
| Nearside Direction indicator affected by the operation of another lamp |1.5.1c| | 1 |
| Offside Direction indicator affected by the operation of another lamp |1.5.1c| | 1 |
| Steering control handlebar movement restricted by cables caught on a projection |2.1.2c| | 1 |
| Offside Front Brake lever attachment screws loose |3.1.2b| | 1 |
| Offside Front Brake lever insecure |3.1.2a| | 1 |
| Offside Front Lower Front shock absorber seal failed and leaking oil |2.3.3| | 1 |
| Centre Front Wheel has an excessively distorted bead rim. |4.2.2| | 1 |
| Centre Front Upper Fuel cap sealing washer deteriorated |7.2.2c| | 1 |
| Nearside Handlebar handgrip not secure to handlebars. |2.1.1c| | 1 |
| Headlamp insecure |1.2.3b| | 1 |
| Rear Wheel spoke excessively loose |4.2.1b| | 1 |
| Rear Stop lamp not working (4.3.1 (a) (ii)) | 1 |
| Front Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 1 |
| Headlamp aim headlamp damaged and function impaired |1.2.3a| | 1 |
| Rear Drive chain sprocket worn to excess |6.2.1e| | 1 |
| Exhaust is leaking and excessively noisey |7.1.1b| | 1 |
| Front Roller brake test indicates a binding brake |3.3.A1a| | 1 |
| Rear Wheel alignment incorrect which adversely affects the handling |2.5.1| | 1 |
| Front Brake caliper|s| securing bolt|s| loose |3.2.A1j| | 1 |
| Rear suspension bearing has excessive free play |2.4.A2a|i|| | 1 |
| Brake reaction bracket securing bolt|s| missing |3.2.A1j| | 1 |
| Steering control fouling between components which interferes with the free movement of the steering |2.1.2a| | 1 |
| Horn is not a constant note |1.7.3c| | 1 |
| Nearside Rear shock absorber seal failed and leaking oil |2.4.A.1c| | 1 |
| Offside Rear shock absorber seal failed and leaking oil |2.4.A.1c| | 1 |
| Front Headlamp at least one does not illuminate on dipped beam |1.2.2a|i|| | 1 |