| Most common failures | No# failures |
|---|
| Headlamp aim out of alignment | 246 |
| Rear reflector missing (4.8.2 (a) (ii)) | 88 |
| Registration plate issues | 76 |
| Registration plate lamp issues | 51 |
| Headlamp not working on dipped beam (4.1.1 (a) (ii)) | 29 |
| Headlamp not working on main beam (4.1.1 (a) (ii)) | 21 |
| Horn not working (7.7 (a) (ii)) | 20 |
| Rear Rear reflector missing (4.8.2 (a) (ii)) | 18 |
| Rear reflector missing |4.8.2 |a| |ii|| | 14 |
| Stop lamp remains on when the brakes are released | 14 |
| Steering headbearing excessively stiff or notchy (2.2.2 (f) (i)) | 13 |
| Horn not working (7.7 (a)) | 13 |
| Front Brake indicates excessive fluctuation of brake effort (1.2.1 (e)) | 12 |
| 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)) | 12 |
| Drive chain excessively loose (6.1.7 (c) (i)) | 11 |
| Front Stop lamp not working (4.3.1 (a) (ii)) | 11 |
| Rear Position lamp not working (4.2.1 (a)) | 10 |
| Front Headlamp not working on dipped beam (4.1.1 (a) (ii)) | 9 |
| Offside Rear Direction indicator not working (4.4.1 (a) (ii)) | 8 |
| Stop lamp not working (4.3.1 (a) (ii)) | 8 |
| Exhaust markings indicating not for road use or similar wording (6.1.2 (c)) | 7 |
| Nearside Handlebar grip insecure to handlebar (2.2.1 (d) (ii)) | 6 |
| Rear Stop lamp not working (4.3.1 (a) (ii)) | 6 |
| Rear Rear reflector missing |4.8.2 |a| |ii|| | 5 |
| Headlamp aim not tested (4.1.2 (b)) | 5 |
| Nearside Rear Direction indicator not working (4.4.1 (a) (ii)) | 5 |
| Exhaust markings indicating not for road use or similar wording |6.1.2 |c|| | 4 |
| Offside Front Direction indicator not working |4.4.1 |a| |ii|| | 4 |
| Nearside Front Direction indicator not working (4.4.1 (a) (ii)) | 4 |
| Drive chain worn to excess (6.1.7 (c) (i)) | 4 |
| Rear Footrest missing (6.2.12 (a)) | 4 |
| Front Position lamp not working (4.2.1 (a)) | 4 |
| Front Headlamp not working on main beam (4.1.1 (a) (ii)) | 4 |
| Headlamp not working on dipped beam |4.1.1 |a| |ii|| | 3 |
| Headlamp not working on main beam |4.1.1 |a| |ii|| | 3 |
| Dipswitch does not operate immediately when selected on dipped beam (4.1.3 (b)) | 3 |
| Front Brake lever has insufficient reserve travel (1.1.2 (a)) | 3 |
| All direction indicators not working (4.4.1 (a) (ii)) | 3 |
| Front Direction indicator obviously incorrectly positioned (4.4.3 (a)) | 3 |
| Rear Brake indicates excessive fluctuation of brake effort (1.2.1 (e)) | 3 |
| Wheel alignment incorrect which adversely affects the handling (2.4 (a)) | 3 |
| Front Brake excessively binding (1.2.1 (f)) | 3 |
| Offside Handlebar grip insecure to handlebar (2.2.1 (d) (ii)) | 3 |