| Most common failures | No# failures |
|---|
| Headlamp aim out of alignment | 4 |
| Drive chain excessively loose |6.2.1d| | 2 |
| Front suspension assembly component loose |2.3.1| | 1 |
| Nearside Rear Lower Wheel damaged or distorted to the extent that control of the motorcycle is likely to be adversely affected Wheel rim cracked (5.2.2 (c) (ii)) | 1 |
| Offside Front Upper Stop lamp not working Stop light switch faulty (4.3.1 (a) (ii)) | 1 |
| Central Rear Lower Wheel alignment incorrect which adversely affects the handling Out of alignment (2.4 (a)) | 1 |
| Headlamp not working on main beam (4.1.1 (a) (ii)) | 1 |
| Horn not working (7.7 (a) (ii)) | 1 |
| Headlamp aim so that beam "kick up" is not visible on the screen (4.1.2 (a)) | 1 |
| Rear position lamp does not illuminate immediately when it is switched on |1.1.3a| | 1 |
| Locking devices not correctly fitted which may make the motor bicycle dangerous to ride |6.2.1h| | 1 |
| Rear Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 1 |
| Horn not loud enough to be heard by another road user |1.7.3a| | 1 |
| Headlamp at least one does not illuminate on dipped beam |1.2.2a|i|| | 1 |
| Rear Rear reflector on motorcycle missing |1.4.1| | 1 |
| Rear Rear suspension bearing has excessive free play |2.4.A2a|i|| | 1 |
| Rear Wheel spoke excessively loose |4.2.1b| | 1 |
| Headlamp not working on dipped beam (4.1.1 (a) (ii)) | 1 |
| Rear Rear reflector missing (4.8.2 (a) (ii)) | 1 |
| Front Wheel spoke excessively loose |5.2.2 |d|| | 1 |
| All direction indicators not working |4.4.1 |a| |ii|| | 1 |
| Stop lamp not working front operated |4.3.1 |a| |ii|| | 1 |
| Front Wheel excessively distorted |5.2.2 |c| |i|| | 1 |
| Headlamp insecure |1.2.3b| | 1 |
| Centre Front Upper Headlamp at least one does not illuminate on dipped beam |1.2.2a|i|| | 1 |
| Front Upper Brake lever has inadequate reserve travel |3.1.3b| | 1 |
| Offside Rear Direction indicators not working |1.5.1c| | 1 |
| Nearside Rear Direction indicators not working |1.5.1c| | 1 |
| Fuel system component leaking Dangerous |6.1.3 |b| |i|| | 1 |
| Brake pipe excessively corroded | 1 |
| Offside Front Upper Horn control defective |1.7.2a| | 1 |
| Offside Front Upper Horn control not readily accesible. |1.7.2a| | 1 |
| Horn not working |1.7.3a| | 1 |
| Rear position lamp adversely affected by the operation of another lamp |1.1.3b| | 1 |
| Stop lamp affected by the operation of another lamp |1.3.2| | 1 |
| Rear wheel spindle loose |2.4.A.2b| | 1 |
| Rear wheel spindle securing nut locking device missing |2.4.A.2b| | 1 |
| Front Wheel has an excessively distorted bead rim. |4.2.2| | 1 |
| Brake hose excessively stretched [Front] (1.1.12 (b) (ii)) | 1 |
| Horn control not functioning. |1.7.2b| | 1 |
| Central Front Front wheel spindle loose Front wheel spindle lose when nipped up restricted movement on wheel due to wheel bearings tightening up or sizing up |2.3.5a| | 1 |
| Nearside Rear Lower Brake component has restricted free movement and operation is likely to be impeded Calipers sticking |3.2.A1h| | 1 |