| Most common failures | No# failures |
|---|
| Rear reflector missing (4.8.2 (a) (ii)) | 82 |
| Drive chain excessively loose (6.1.7 (c) (i)) | 47 |
| Headlamp aim out of alignment | 44 |
| Registration plate lamp issues | 43 |
| Registration plate issues | 32 |
| Rear Rear reflector missing (4.8.2 (a) (ii)) | 17 |
| Drive chain horseshoe locking device incorrectly fitted (6.1.7 (j) (i)) | 15 |
| Rear Wheel bearing has excessive play (5.1.3 (a) (i)) | 15 |
| Nearside Rear Direction indicator not working (4.4.1 (a) (ii)) | 13 |
| Drive chain worn to excess (6.1.7 (c) (i)) | 12 |
| Rear Stop lamp not working (4.3.1 (a) (ii)) | 12 |
| Drive chain so loose it is likely to fail (6.1.7 (c) (ii)) | 10 |
| Nearside Front Direction indicator not working (4.4.1 (a) (ii)) | 10 |
| Steering headbearing excessively stiff or notchy (2.2.2 (f) (i)) | 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)) | 7 |
| Drive chain excessively tight (6.1.7 (k) (i)) | 6 |
| Wheel alignment incorrect which adversely affects the handling (2.4 (a)) | 6 |
| Rear Direction indicator obviously incorrectly positioned (4.4.3 (a)) | 6 |
| Drive chain so worn it is likely to fail (6.1.7 (c) (ii)) | 5 |
| All direction indicators not working (4.4.1 (a) (ii)) | 5 |
| Steering headbearing has excessive wear or free play (2.2.2 (f) (i)) | 5 |
| Offside Front Direction indicator not working (4.4.1 (a) (ii)) | 4 |
| Drive chain excessively tight, so that it is likely to fail (6.1.7 (k) (ii)) | 4 |
| Rear Brake excessively binding (1.2.1 (f)) | 4 |
| Nearside Front Footrest insecure (6.2.12 (a)) | 4 |
| Rear Stop lamp does not illuminate by the operation of both brake controls (4.3.2 (a) (iii)) | 3 |
| Offside Front Footrest insecure (6.2.12 (a)) | 3 |
| Handlebar retaining device loose (2.2.1 (b) (i)) | 3 |
| Rear Wheel bearing play so excessive it is likely to break up (5.1.3 (a) (ii)) | 3 |
| Nearside Rear Footrest missing (6.2.12 (a)) | 3 |
| Offside Front Direction indicator adversely affected by the operation of another lamp (4.4.3 (b)) | 3 |
| Headlamp not working on main beam (4.1.1 (a) (ii)) | 3 |
| All direction indicators missing (4.4.1 (a) (ii)) | 3 |
| Offside Rear Footrest missing (6.2.12 (a)) | 3 |
| Front Brake disc contaminated (1.1.14 (b)) | 3 |
| Nearside Front Shock absorber has a serious fluid leak (5.3.2 (b)) | 3 |
| Rear All direction indicators obviously incorrectly positioned (4.4.3 (a)) | 3 |
| Nearside Front Direction indicator incorrect colour (4.4.3 (a)) | 3 |
| Offside Front Direction indicator incorrect colour (4.4.3 (a)) | 3 |
| Rear Valve stem seriously damaged (5.2.3 (j)) | 3 |
| Stop lamp not working (4.3.1 (a) (ii)) | 2 |
| Rear Drive chain sprocket worn to excess (6.1.7 (c) (i)) | 2 |
| Front Brake excessively binding (1.2.1 (f)) | 2 |
| Rear Shock absorber has negligible damping effect (5.3.2 (b)) | 2 |
| Throttle operating incorrectly (6.2.7 (a) (i)) | 2 |
| Rear Drive chain excessively loose (6.1.7 (c) (i)) | 2 |
| Central Rear Rear reflector missing (4.8.2 (a) (ii)) | 2 |
| Rear Wheel bearing play so excessive that directional control is impaired (5.1.3 (a) (ii)) | 2 |
| Nearside Rear Direction indicator adversely affected by the operation of another lamp (4.4.3 (b)) | 2 |
| Nearside Rear Drive chain so loose it is likely to fail (6.1.7 (c) (ii)) | 2 |
| Stop lamp does not illuminate by the operation of both brake controls (4.3.2 (a) (iii)) | 2 |
| Horn not working (7.7 (a)) | 2 |
| Rear Position lamp not working (4.2.1 (a)) | 2 |
| Stop lamp remains on when the brakes are released | 2 |
| Nearside Rear Direction indicator with a multiple light source more than 1/2 not functioning (4.4.1 (a) (ii)) | 2 |
| Handlebar deformed to the extent that steering is affected (2.2.1 (c) (ii)) | 2 |
| Nearside Front Position lamp not working (4.2.1 (a)) | 2 |
| Front Wheel excessively distorted (5.2.2 (c) (i)) | 2 |
| Front Brake indicates excessive fluctuation of brake effort (1.2.1 (e)) | 2 |
| Nearside Handlebar grip insecure to handlebar (2.2.1 (d) (ii)) | 2 |