| Most common failures | No# failures |
|---|
| Headlamp aim out of alignment | 9 |
| Rear reflector on motorcycle missing |1.4.1| | 7 |
| Drive chain excessively loose |6.2.1d| | 5 |
| Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 4 |
| Headlamp at least one does not illuminate on dipped beam |1.2.2a|i|| | 4 |
| Direction indicators not working |1.5.1c| | 4 |
| Rear Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 3 |
| Wheel alignment incorrect which adversely affects the handling |2.5.1| | 3 |
| Front 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 |
| Rear position lamp does not illuminate immediately when it is switched on |1.1.3a| | 3 |
| Front Roller brake test indicates a binding brake |3.3.A1a| | 2 |
| Front Brake lever has inadequate reserve travel |3.1.3b| | 2 |
| Front Headlamp at least one does not illuminate on dipped beam |1.2.2a|i|| | 2 |
| Locking device|s| not correctly fitted which may make the motor bicycle dangerous to ride |6.2.1h| | 2 |
| Registration plate issues | 2 |
| Headlamp at least one does not illuminate on main beam |1.2.2a|ii|| | 2 |
| 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 |
| Front Brake hose is likely to be fouled or trapped by moving parts |3.2.B2c| | 1 |
| Nearside Rear Direction indicator not working |1.5.1c| | 1 |
| Steering headbearing has excessive free play |2.2.2| | 1 |
| Rear Roller brake test indicates a sticking brake |3.3.A1a| | 1 |
| Rear wheel spindle securing nut locking device missing |2.4.A.2b| | 1 |
| Front Upper An item not tested |Manual| | 1 |
| Throttle has a significant change in engine speed whilst moving the steering from lock to lock |2.1.4| | 1 |
| Position lamp switch faulty |1.1.4a| | 1 |
| Front Headlamp insecure |1.2.3b| | 1 |
| Offside Front Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 1 |
| Offside Front Headlamp switch insecure |1.2.4| | 1 |
| Offside Front Brake lever is so short and the brake cannot be readily applied |3.1.3c| | 1 |
| Rear Roller brake test indicates a binding brake |3.3.A1a| | 1 |
| Headlamp insecure |1.2.3b| | 1 |
| Nearside Drive chain excessively loose |6.2.1d| | 1 |
| Stop lamp affected by the operation of another lamp |1.3.2| | 1 |
| Horn not loud enough to be heard by another road user |1.7.3a| | 1 |
| Drive chain excessively tight |6.2.1d| | 1 |
| Front Brake disc|s| has excessive run out |3.2.A1m| | 1 |
| Front Roller brake test indicates a severely juddering brake |3.3.A1b| | 1 |
| Front Wheel has an excessively distorted bead rim. |4.2.2| | 1 |
| Rear Brake pedal cannot be released smoothly |3.1.3d| | 1 |
| Rear Drive chain excessively tight |6.2.1d| | 1 |
| Brake lever cannot be released smoothly |3.1.3d| | 1 |
| Front Brake master cylinder has a seized master cylinder pivot. |3.2.B5| | 1 |
| Horn not working |1.7.3a| | 1 |
| Offside Rear Direction indicators not working |1.5.1c| | 1 |
| Brake pedal is positioned so that the brake cannot be readily applied (1.1.2 (d)) | 1 |
| Front Brake excessively binding (1.2.1 (f)) | 1 |
| Front Front wheel bearings have excessive free play |2.3.5b| | 1 |
| Rear Drive chain excessively loose |6.2.1d| | 1 |
| Front Floor brake test indicates a binding brake |3.3.C2c| | 1 |
| Front shock absorber seal failed and leaking oil |2.3.3| | 1 |
| Front Floor brake test indicates a sticking brake |3.3.C2c| | 1 |
| Headlamp dipped beam affected by the operation of another lamp |1.2.2c| | 1 |
| Rear position lamp adversely affected by the operation of another lamp |1.1.3b| | 1 |
| Nearside Front shock absorber seal failed and leaking oil |2.3.3| | 1 |
| Rear suspension component loose |2.4.A.1a| | 1 |
| Handlebar deformed |2.1.1b| | 1 |
| Wheel has an excessively distorted bead rim. |4.2.2| | 1 |
| Wheel has an excessively eccentric bead rim. |4.2.2| | 1 |