| Most common failures | No# failures |
|---|
| Headlamp aim out of alignment | 97 |
| Rear reflector missing (4.8.2 (a) (ii)) | 64 |
| Registration plate lamp issues | 54 |
| Registration plate issues | 39 |
| Drive chain excessively loose (6.1.7 (c) (i)) | 31 |
| Rear Wheel bearing has excessive play (5.1.3 (a) (i)) | 27 |
| Rear Brake indicates excessive fluctuation of brake effort (1.2.1 (e)) | 27 |
| Front Brake excessively binding (1.2.1 (f)) | 24 |
| Headlamp not working on dipped beam (4.1.1 (a) (ii)) | 16 |
| Nearside Handlebar grip insecure to handlebar (2.2.1 (d) (ii)) | 15 |
| Rear reflector missing |4.8.2 |a| |ii|| | 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 |
| Headlamp not working on main beam (4.1.1 (a) (ii)) | 11 |
| Rear Rear reflector missing (4.8.2 (a) (ii)) | 11 |
| Offside Front Shock absorber has a serious fluid leak (5.3.2 (b)) | 11 |
| Nearside Front Shock absorber has a serious fluid leak (5.3.2 (b)) | 10 |
| Drive chain worn to excess (6.1.7 (c) (i)) | 10 |
| Rear Stop lamp switch with a delay in operation (4.3.2 (a) (ii)) | 10 |
| Rear Wheel bearing play so excessive it is likely to break up (5.1.3 (a) (ii)) | 10 |
| Rear Drive chain excessively loose (6.1.7 (c) (i)) | 9 |
| Rear Stop lamp not working (4.3.1 (a) (ii)) | 8 |
| Drive chain excessively loose |6.1.7 |c| |i|| | 8 |
| Headlamp aim projected beam image obviously incorrect (4.1.2 (c)) | 8 |
| Offside Rear Direction indicator not working (4.4.1 (a) (ii)) | 7 |
| Nearside Rear Direction indicator not working (4.4.1 (a) (ii)) | 7 |
| Rear Brake disc fractured (1.1.14 (a) (ii)) | 7 |
| Rear Position lamp not working (4.2.1 (a)) | 6 |
| Stop lamp remains on when the brakes are released | 6 |
| Front Brake indicates excessive fluctuation of brake effort (1.2.1 (e)) | 5 |
| Drive chain so loose it is likely to fail (6.1.7 (c) (ii)) | 5 |
| Nearside Handlebar grip insecure to handlebar |2.2.1 |d| |ii|| | 5 |
| Rear Drive chain worn to excess (6.1.7 (c) (i)) | 5 |
| Steering headbearing excessively stiff or notchy (2.2.2 (f) (i)) | 5 |
| Rear Brake grabbing severely (1.2.1 (c)) | 4 |
| Rear Drive chain sprocket worn to excess (6.1.7 (c) (i)) | 4 |
| Drive chain excessively tight (6.1.7 (k) (i)) | 4 |
| Nearside Rear Footrest missing (6.2.12 (a)) | 4 |
| Nearside Front Handlebar grip insecure to handlebar (2.2.1 (d) (ii)) | 4 |
| Front Shock absorber has a serious fluid leak (5.3.2 (b)) | 4 |
| Offside Handlebar grip insecure to handlebar (2.2.1 (d) (ii)) | 4 |
| Rear Brake indicates excessive fluctuation of brake effort |1.2.1 |e|| | 4 |
| Rear Brake excessively binding (1.2.1 (f)) | 4 |
| Front Wheel bearing has excessive play (5.1.3 (a) (i)) | 4 |
| Front Stop lamp not working (4.3.1 (a) (ii)) | 4 |
| Rear Wheel bearing has excessive play |5.1.3 |a| |i|| | 4 |
| Rear Drive chain excessively tight (6.1.7 (k) (i)) | 3 |
| Stop lamp not working (4.3.1 (a) (ii)) | 3 |
| Drive chain excessively tight, so that it is likely to fail (6.1.7 (k) (ii)) | 3 |
| Central Rear Rear reflector missing (4.8.2 (a) (ii)) | 3 |
| Rear Direction indicator obviously incorrectly positioned (4.4.3 (a)) | 3 |
| Front Headlamp not working on main beam (4.1.1 (a) (ii)) | 3 |
| Front Headlamp not working on dipped beam (4.1.1 (a) (ii)) | 3 |
| Drive chain so worn it is likely to fail (6.1.7 (c) (ii)) | 3 |
| Headlamp aim not tested (4.1.2 (b)) | 3 |
| Horn not working (7.7 (a)) | 3 |
| Rear Stop lamp does not illuminate by the operation of both brake controls (4.3.2 (a) (iii)) | 3 |
| Horn not working (7.7 (a) (ii)) | 3 |
| Headlamp not working on dipped beam |4.1.1 |a| |ii|| | 3 |
| Headlamp aim unable to be tested (4.1.2 (b)) | 3 |
| Rear Wheel bearing so rough it is likely to overheat or break up (5.1.3 (b) (ii)) | 3 |
| Offside Rear Footrest missing (6.2.12 (a)) | 3 |
| Front Brake excessively binding |1.2.1 |f|| | 3 |