| Most common failures | No# failures |
|---|
| Headlamp aim out of alignment | 211 |
| Registration plate issues | 76 |
| Rear reflector missing (4.8.2 (a) (ii)) | 50 |
| Rear reflector missing |4.8.2 |a| |ii|| | 24 |
| Rear reflector on motorcycle missing |1.4.1| | 23 |
| Front Stop lamp not working (4.3.1 (a) (ii)) | 19 |
| Rear Brake excessively binding (1.2.1 (f)) | 18 |
| Registration plate lamp issues | 14 |
| Offside Rear Direction indicator not working (4.4.1 (a) (ii)) | 9 |
| Front Brake excessively binding (1.2.1 (f)) | 8 |
| Exhaust markings indicating not for road use or similar wording |7.1.4| | 7 |
| Rear Rear reflector missing (4.8.2 (a) (ii)) | 7 |
| Exhaust markings indicating not for road use or similar wording (6.1.2 (c)) | 7 |
| 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| | 6 |
| Nearside Handlebar grip insecure to handlebar (2.2.1 (d) (ii)) | 6 |
| Steering headbearing excessively stiff or notchy (2.2.2 (f) (i)) | 6 |
| Nearside Front Direction indicator not working (4.4.1 (a) (ii)) | 6 |
| Headlamp not working on dipped beam (4.1.1 (a) (ii)) | 6 |
| Front Stop lamp not working |4.3.1 |a| |ii|| | 5 |
| Rear Brake excessively binding |1.2.1 |f|| | 5 |
| Horn not working |7.7 |a| |ii|| | 5 |
| Nearside Handlebar handgrip not secure to handlebars. |2.1.1c| | 5 |
| Headlamp insecure |1.2.3b| | 5 |
| Drive chain excessively loose (6.1.7 (c) (i)) | 5 |
| Rear Position lamp not working (4.2.1 (a)) | 5 |
| Steering movement excessively `notchy` with the wheel raised |2.2.1b| | 4 |
| Steering movement excessively `notchy` with the weight on the lower bearing |2.2.1a| | 4 |
| Throttle operating incorrectly |6.2.1f| | 4 |
| Front Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 4 |
| Horn not working |1.7.3a| | 4 |
| 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)) | 4 |
| Front Position lamp not working (4.2.1 (a)) | 4 |
| Stop lamp not working (4.3.1 (a) (ii)) | 4 |
| Front Brake indicates excessive fluctuation of brake effort (1.2.1 (e)) | 4 |
| Headlamp insecure (4.1.1 (c)) | 4 |
| Horn not working (7.7 (a)) | 4 |
| Headlamp aim beam image kick up to the offside |1.6| | 3 |
| Drive chain excessively loose |6.2.1d| | 3 |
| Front Roller brake test indicates a binding brake |3.3.A1a| | 3 |
| Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 3 |
| Exhaust markings indicating not for road use or similar wording |6.1.2 |c|| | 3 |
| Stop lamp not working |4.3.1 |a| |ii|| | 3 |
| Rear Stop lamp not working |4.3.1 |a| |ii|| | 3 |
| Front Brake indicates excessive fluctuation of brake effort |1.2.1 |e|| | 3 |
| Front Stop lamp switch with a delay in operation (4.3.2 (a) (ii)) | 3 |
| Horn not working (7.7 (a) (ii)) | 3 |
| Headlamp not working on main beam (4.1.1 (a) (ii)) | 3 |
| Rear Footrest missing (6.2.12 (a)) | 3 |
| Nearside Front Handlebar grip insecure to handlebar (2.2.1 (d) (ii)) | 3 |
| Nearside Rear Direction indicator not working (4.4.1 (a) (ii)) | 3 |
| Stop lamp does not illuminate by the operation of both brake controls (4.3.2 (a) (iii)) | 3 |
| Front Stop lamp does not illuminate by the operation of both brake controls (4.3.2 (a) (iii)) | 3 |