| Most common failures | No# failures |
|---|
| Headlamp aim out of alignment | 201 |
| Registration plate issues | 139 |
| Rear reflector missing (4.8.2 (a) (ii)) | 95 |
| Headlamp not working on dipped beam (4.1.1 (a) (ii)) | 43 |
| Registration plate lamp issues | 31 |
| Horn not working (7.7 (a) (ii)) | 18 |
| Headlamp not working on main beam (4.1.1 (a) (ii)) | 18 |
| Horn not working (7.7 (a)) | 18 |
| Rear Rear reflector missing (4.8.2 (a) (ii)) | 17 |
| Nearside Rear Direction indicator incorrect colour (4.4.3 (a)) | 15 |
| Offside Rear Direction indicator incorrect colour (4.4.3 (a)) | 15 |
| Drive chain excessively loose (6.1.7 (c) (i)) | 11 |
| Stop lamp remains on when the brakes are released | 9 |
| Headlamp aim not tested (4.1.2 (b)) | 9 |
| Exhaust noise is clearly in excess of that emitted by a similar motorcycle fitted with a standard silencer in average condition (8.1.1 (a)) | 8 |
| Offside Rear Direction indicator not working (4.4.1 (a) (ii)) | 7 |
| Steering headbearing excessively stiff or notchy (2.2.2 (f) (i)) | 7 |
| Stop lamp not working (4.3.1 (a) (ii)) | 6 |
| Front Headlamp not working on dipped beam (4.1.1 (a) (ii)) | 6 |
| Nearside Front Direction indicator not working (4.4.1 (a) (ii)) | 5 |
| Rear Position lamp not working (4.2.1 (a)) | 5 |
| Rear Direction indicator incorrect colour (4.4.3 (a)) | 5 |
| Central Rear Rear reflector missing (4.8.2 (a) (ii)) | 4 |
| Front Brake indicates excessive fluctuation of brake effort (1.2.1 (e)) | 4 |
| Front Steering headbearing excessively stiff or notchy (2.2.2 (f) (i)) | 4 |
| Front Position lamp not working (4.2.1 (a)) | 3 |
| Dipswitch does not operate immediately when selected on dipped beam (4.1.3 (b)) | 3 |
| Wheel alignment incorrect which adversely affects the handling (2.4 (a)) | 3 |
| Front Wheel bearing has excessive play (5.1.3 (a) (i)) | 3 |
| Drive chain worn to excess (6.1.7 (c) (i)) | 3 |
| Offside Front Direction indicator not working (4.4.1 (a) (ii)) | 3 |
| Front Horn not working (7.7 (a) (ii)) | 2 |
| Rear Stop lamp adversely affected by the operation of another lamp (4.3.3 (b)) | 2 |
| Central Front Upper Headlamp not working on main beam (4.1.1 (a) (ii)) | 2 |
| Rear Direction indicator adversely affected by the operation of another lamp (4.4.3 (b)) | 2 |
| Headlamp aim so that beam "kick up" is not visible on the screen (4.1.2 (a)) | 2 |
| Nearside Rear Direction indicator not working (4.4.1 (a) (ii)) | 2 |
| All direction indicators not working (4.4.1 (a) (ii)) | 2 |
| Rear Position lamp adversely affected by the operation of another lamp (4.2.3 (b)) | 2 |
| Central Front Headlamp not working on dipped beam (4.1.1 (a) (ii)) | 2 |
| Front Stop lamp does not illuminate by the operation of both brake controls (4.3.2 (a) (iii)) | 2 |
| Horn sound not in accordance with requirements (7.7 (c)) | 2 |
| Front Brake excessively binding (1.2.1 (f)) | 2 |
| Headlamp aim projected beam image obviously incorrect (4.1.2 (c)) | 2 |
| Rear Brake indicates excessive fluctuation of brake effort (1.2.1 (e)) | 2 |