| Most common failures | No# failures |
|---|
| Headlamp aim out of alignment | 91 |
| Front Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 17 |
| Registration plate issues | 13 |
| Horn not working |1.7.3a| | 13 |
| Exhaust markings indicating not for road use or similar wording |7.1.4| | 12 |
| Registration plate lamp issues | 9 |
| Drive chain excessively loose |6.2.1d| | 8 |
| Front Stop lamp not working (4.3.1 (a) (ii)) | 7 |
| Headlamp at least one does not illuminate on dipped beam |1.2.2a|i|| | 6 |
| Front Roller brake test indicates a binding brake |3.3.A1a| | 6 |
| Rear Roller brake test indicates a binding brake |3.3.A1a| | 6 |
| Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 5 |
| Rear position lamp does not illuminate immediately when it is switched on |1.1.3a| | 5 |
| Front Headlamp at least one does not illuminate on dipped beam |1.2.2a|i|| | 5 |
| Front position lamp does not illuminate immediately when switched on |1.1.3a| | 5 |
| Wheel alignment incorrect which adversely affects the handling |2.5.1| | 4 |
| Rear shock absorber has inadequate damping effect. |2.4.A.3b| | 4 |
| Headlamp aim beam image kick up to the offside |1.6| | 4 |
| Horn not working (7.7 (a)) | 4 |
| Front Front position lamp does not illuminate immediately when switched on |1.1.3a| | 3 |
| Front Headlamp aim beam image kick up to the offside |1.6| | 3 |
| Offside Front Front shock absorber seal failed and leaking oil |2.3.3| | 3 |
| Rear Brake disc|s| excessively worn |3.2.A1l| | 3 |
| Headlamp not working on dipped beam (4.1.1 (a) (ii)) | 3 |
| Horn sound not in accordance with requirements (7.7 (c)) | 3 |
| Headlamp insecure |1.2.3b| | 2 |
| Rear Rear position lamp does not illuminate immediately when it is switched on |1.1.3a| | 2 |
| Rear Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 2 |
| Headlamp not working on dipped beam |4.1.1 |a| |ii|| | 2 |
| Front Roller brake test indicates excessive fluctuation of brake effort |3.3.A1d| | 2 |
| Horn not loud enough to be heard by another road user |1.7.3a| | 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 |
| Drive chain worn to excess |6.2.1e| | 2 |
| Front Brake disc|s| excessively worn |3.2.A1l| | 2 |
| Rear shock absorber seal failed and leaking oil |2.4.A.1c| | 2 |
| Front Wheel spoke excessively loose |4.2.1b| | 2 |
| Nearside Front shock absorber seal failed and leaking oil |2.3.3| | 2 |
| Front Stop lamp remains on when the brake is released |1.3.1e| | 2 |
| Rear Stop lamp remains on when the brake is released |1.3.1e| | 2 |
| Nearside Exhaust mounting does not fully support the exhaust system |7.1.1.c| | 2 |
| Front Brake lever has inadequate reserve travel |3.1.3b| | 2 |
| Rear Stop lamp not working (4.3.1 (a) (ii)) | 2 |
| Horn not working (7.7 (a) (ii)) | 2 |
| Nearside Rear Direction indicator not working (4.4.1 (a) (ii)) | 2 |
| Front Position lamp not working (4.2.1 (a)) | 2 |