| Most common failures | No# failures |
|---|
| Horn not working |1.7.3a| | 2 |
| Headlamp aim out of alignment | 2 |
| Rear Drive chain sprocket worn to excess |6.2.1e| | 2 |
| Rear Stop lamp affected by the operation of another lamp |1.3.2| | 2 |
| Rear Rear position lamp does not illuminate immediately when it is switched on |1.1.3a| | 1 |
| Rear Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 1 |
| Nearside Rear Direction indicators not working |1.5.1c| | 1 |
| Headlamp at least one does not illuminate on dipped beam |1.2.2a|i|| | 1 |
| Headlamp at least one does not illuminate on main beam |1.2.2a|ii|| | 1 |
| Rear position lamp does not illuminate immediately when it is switched on |1.1.3a| | 1 |
| Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 1 |
| Direction indicators not working |1.5.1c| | 1 |
| Headlamp aim not tested |1.6| | 1 |
| Offside Rear Brake pedal has inadequate reserve travel |3.1.3b| | 1 |
| All direction indicators adversely affected by the operation of another lamp (4.4.3 (b)) | 1 |
| Front Direction indicators not working |1.5.1c| | 1 |
| Rear Direction indicators not working |1.5.1c| | 1 |
| Front Locking devices not correctly fitted which may make the motor bicycle dangerous to ride |6.2.1h| | 1 |
| Rear Locking devices not correctly fitted which may make the motor bicycle dangerous to ride |6.2.1h| | 1 |
| Headlamp insecure |1.2.3b| | 1 |
| Rear Stop lamp not working |4.3.1 |a| |ii|| | 1 |
| Drive chain excessively tight |6.2.1d| | 1 |
| Nearside Rear Direction indicator affected by the operation of another lamp |1.5.1c| | 1 |
| Rear Floor brake test indicates a sticking brake |3.3.C2c| | 1 |
| Front Floor brake test indicates a severely grabbing brake |3.3.C2d| | 1 |
| Rear Wheel spoke excessively loose |4.2.1b| | 1 |
| Floor brake test No brake control achieves an efficiency of 30%. |3.3.C1a| | 1 |
| Floor brake test Neither brake control achieves an efficiency of 25% |3.3.C1b| | 1 |
| Front Horn is not a constant note |1.7.3c| | 1 |
| Front Direction indicators affected by the operation of another lamp |1.5.1c| | 1 |
| Rear Direction indicators affected by the operation of another lamp |1.5.1c| | 1 |
| Front Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 1 |
| Front Stop lamp affected by the operation of another lamp |1.3.2| | 1 |
| Nearside Front Direction indicators flashing more than 120 times per minute |1.5.1c| | 1 |
| Front Direction indicators flashing more than 120 times per minute |1.5.1c| | 1 |
| Offside Rear Direction indicators flashing more than 120 times per minute |1.5.1c| | 1 |
| Nearside Rear Direction indicators flashing more than 120 times per minute |1.5.1c| | 1 |
| Stop lamp light intensity significantly reduced |4.3.3 |a| |ii|| | 1 |
| Steering headbearing in such a condition that steering control is adversely affected |2.2.2 |f| |ii|| | 1 |
| Rear Drive chain worn to excess |6.1.7 |c| |i|| | 1 |
| Drive chain sprocket so worn it is likely to fail |6.1.7 |c| |ii|| | 1 |
| Front Motorcycle structure has a fracture which is likely to adversely affect braking or steering |6.1.1 |a| |ii|| | 1 |
| Rear Wheel bearing play so excessive it is likely to break up |5.1.3 |a| |ii|| | 1 |
| Front Brake lever has inadequate reserve travel |3.1.3b| | 1 |
| Roller brake test The less effective brake control does not achieve an efficiency of 25%. |3.3.A2b| | 1 |
| Front Roller brake test indicates a sticking brake |3.3.A1a| | 1 |
| Steering movement excessively `notchy` with the weight on the lower bearing |2.2.1a| | 1 |
| Front mudguard insecure |2.3.7| | 1 |
| Front suspension assembly component loose |2.3.1| | 1 |
| Brake reaction bracket insecure |3.2.A1j| | 1 |
| Rear wheel bearings are excessively rough |2.4.A.2c| | 1 |
| Nearside Front Front shock absorber seal failed and leaking oil |2.3.3| | 1 |
| Central Front Headlamp not working on dipped beam (4.1.1 (a) (ii)) | 1 |
| Central Front Headlamp not working on main beam (4.1.1 (a) (ii)) | 1 |