| Most common failures | No# failures |
|---|
| Registration plate issues | 85 |
| Rear reflector on motorcycle missing |1.4.1| | 84 |
| Headlamp at least one does not illuminate on dipped beam |1.2.2a|i|| | 38 |
| Horn not working |1.7.3a| | 36 |
| Headlamp aim out of alignment | 28 |
| Rear reflector missing (4.8.2 (a) (ii)) | 20 |
| Rear Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 17 |
| Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 14 |
| Horn missing |1.7.1| | 14 |
| Front wheel bearings have excessive free play |2.3.5b| | 14 |
| Headlamp at least one does not illuminate on main beam |1.2.2a|ii|| | 12 |
| Horn not working (7.7 (a) (ii)) | 11 |
| Rear wheel bearings have excessive free play |2.4.A.2c| | 10 |
| Front wheel bearings are excessively rough |2.3.5b| | 10 |
| Front position lamp does not illuminate immediately when switched on |1.1.3a| | 9 |
| Horn not working |7.7 |a| |ii|| | 8 |
| Rear reflector missing |4.8.2 |a| |ii|| | 8 |
| Front Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 7 |
| Rear Rear reflector on motorcycle missing |1.4.1| | 6 |
| Rear position lamp does not illuminate immediately when it is switched on |1.1.3a| | 6 |
| Rear Stop lamp not working (4.3.1 (a) (ii)) | 6 |
| Nearside Front shock absorber seal failed and leaking oil |2.3.3| | 5 |
| Front Stop lamp not working (4.3.1 (a) (ii)) | 5 |
| Headlamp not working on dipped beam (4.1.1 (a) (ii)) | 5 |
| Headlamp aim beam image kick up to the offside |1.6| | 5 |
| Horn not working (7.7 (a)) | 5 |
| Front Wheel bearing rough when rotated (5.1.3 (b) (i)) | 5 |
| Front Wheel bearing has excessive play (5.1.3 (a) (i)) | 5 |
| Headlamp aim so that beam "kick up" is not visible on the screen (4.1.2 (a)) | 4 |
| Registration plate lamp issues | 4 |
| Headlamp not working on main beam (4.1.1 (a) (ii)) | 4 |
| Stop lamp remains on when the brake is released |1.3.1e| | 4 |
| Drive chain excessively loose |6.2.1d| | 4 |
| Rear Position lamp not working (4.2.1 (a)) | 3 |
| Horn not loud enough to be heard by another road user |1.7.3a| | 3 |
| Nearside Rear Direction indicator missing |1.5.1a| | 3 |
| Offside Rear Direction indicator missing |1.5.1a| | 3 |
| Headlamp not working on dipped beam |4.1.1 |a| |ii|| | 3 |
| Rear Wheel bearing has excessive play |5.1.3 |a| |i|| | 3 |
| Offside Front shock absorber seal failed and leaking oil |2.3.3| | 3 |
| Rear Rear reflector missing (4.8.2 (a) (ii)) | 3 |
| Rear Wheel spoke excessively loose |4.2.1b| | 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| | 2 |
| Front Front position lamp does not illuminate immediately when switched on |1.1.3a| | 2 |
| Offside Front Shock absorber has a serious fluid leak (5.3.2 (b)) | 2 |
| Front All position lamps do not illuminate immediately when switched on |1.1.3a| | 2 |
| Rear All position lamps do not illuminate immediately when switched on |1.1.3a| | 2 |
| Nearside Front Direction indicator flashing more than 120 times per minute |1.5.1c| | 2 |
| Front Shock absorber has a serious fluid leak (5.3.2 (b)) | 2 |
| Front Wheel bearing rough when rotated |5.1.3 |b| |i|| | 2 |
| Nearside Front Shock absorber has a serious fluid leak (5.3.2 (b)) | 2 |
| Steering headbearing has excessive wear or free play (2.2.2 (f) (i)) | 2 |
| Rear Wheel bearing play so excessive it is likely to break up (5.1.3 (a) (ii)) | 2 |
| Throttle operating incorrectly |6.2.1f| | 2 |
| Front Headlamp at least one does not illuminate on dipped beam |1.2.2a|i|| | 2 |
| Rear Rear wheel bearings have excessive free play |2.4.A.2c| | 2 |
| Front Roller brake test indicates a binding brake |3.3.A1a| | 2 |
| Rear mono-shock pivot excessively worn |2.4.B.4| | 2 |
| Headlamp switch faulty |1.2.4| | 2 |
| Front Front wheel bearings are excessively rough |2.3.5b| | 2 |
| Stop lamp remains on when the brakes are released | 2 |
| Rear shock absorber seal failed and leaking oil |2.4.A.1c| | 2 |
| Rear shock absorber has inadequate damping effect. |2.4.A.3b| | 2 |
| Horn control not functioning. |1.7.2b| | 2 |
| Horn sound not in accordance with requirements (7.7 (c)) | 2 |
| Front Brake disc|s| cracked |3.2.A1g| | 2 |
| Rear Rear reflector missing |4.8.2 |a| |ii|| | 2 |
| Rear position lamp adversely affected by the operation of another lamp |1.1.3b| | 2 |
| Rear Drive chain sprocket worn to excess |6.2.1e| | 2 |
| Front Brake excessively binding (1.2.1 (f)) | 2 |
| Drive chain excessively loose (6.1.7 (c) (i)) | 2 |
| Headlamp not working on main beam |4.1.1 |a| |ii|| | 2 |
| Rear Wheel bearing has excessive play (5.1.3 (a) (i)) | 2 |
| Rear Wheel spoke excessively loose (5.2.2 (d)) | 2 |
| Drive chain worn to excess |6.2.1e| | 2 |