| Most common failures | No# failures |
|---|
| Headlamp aim out of alignment | 101 |
| Registration plate issues | 70 |
| Rear reflector on motorcycle missing |1.4.1| | 70 |
| Registration plate lamp issues | 63 |
| Rear reflector missing (4.8.2 (a) (ii)) | 32 |
| Rear reflector missing |4.8.2 |a| |ii|| | 14 |
| Drive chain excessively loose (6.1.7 (c) (i)) | 12 |
| Rear Rear reflector on motorcycle missing |1.4.1| | 9 |
| Front Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 8 |
| Drive chain excessively loose |6.2.1d| | 8 |
| Headlamp at least one does not illuminate on dipped beam |1.2.2a|i|| | 7 |
| Rear Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 7 |
| Drive chain excessively loose |6.1.7 |c| |i|| | 6 |
| Rear Wheel bearing has excessive play (5.1.3 (a) (i)) | 6 |
| Front Stop lamp not working (4.3.1 (a) (ii)) | 6 |
| Headlamp at least one does not illuminate on main beam |1.2.2a|ii|| | 5 |
| Rear Rear reflector missing |4.8.2 |a| |ii|| | 5 |
| Front Headlamp not working on dipped beam (4.1.1 (a) (ii)) | 5 |
| Front Brake indicates excessive fluctuation of brake effort (1.2.1 (e)) | 5 |
| Nearside Front Shock absorber has a serious fluid leak (5.3.2 (b)) | 5 |
| Rear Valve stem seriously damaged (5.2.3 (j)) | 5 |
| Rear wheel bearings have excessive free play |2.4.A.2c| | 4 |
| Horn not working |1.7.3a| | 4 |
| Stop lamp remains on when the brakes are released | 4 |
| Nearside Rear Direction indicator not working (4.4.1 (a) (ii)) | 4 |
| Headlamp not working on dipped beam (4.1.1 (a) (ii)) | 4 |
| Drive chain so loose it is likely to fail |6.1.7 |c| |ii|| | 3 |
| 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|| | 3 |
| Drive chain worn to excess |6.2.1e| | 3 |
| Horn not working |7.7 |a| |ii|| | 3 |
| Front wheel bearings have excessive free play |2.3.5b| | 3 |
| Front Stop lamp does not emit a steady light |1.3.1b| | 3 |
| Front Roller brake test indicates excessive fluctuation of brake effort |3.3.A1d| | 3 |
| Front Stop lamp not working |4.3.1 |a| |ii|| | 3 |
| Stop lamp not working (4.3.1 (a) (ii)) | 3 |
| Offside Front Shock absorber has a serious fluid leak (5.3.2 (b)) | 3 |
| Rear Rear reflector missing (4.8.2 (a) (ii)) | 3 |
| Front Stop lamp switch with a delay in operation (4.3.2 (a) (ii)) | 3 |
| Horn not working (7.7 (a) (ii)) | 3 |
| Nearside Handlebar grip insecure to handlebar (2.2.1 (d) (ii)) | 3 |
| Horn not working (7.7 (a)) | 3 |
| Rear Stop lamp not working (4.3.1 (a) (ii)) | 3 |
| Exhaust has part of the system missing |7.1.1a| | 2 |
| Rear position lamp does not illuminate immediately when it is switched on |1.1.3a| | 2 |
| Front Horn not working |7.7 |a| |ii|| | 2 |
| Steering headbearing excessively stiff or notchy |2.2.2 |f| |i|| | 2 |
| Headlamp aim so that beam "kick up" is not visible on the screen |4.1.2 |a|| | 2 |
| Offside Front shock absorber seal failed and leaking oil |2.3.3| | 2 |
| Front Wheel bearing has excessive play |5.1.3 |a| |i|| | 2 |
| Front Brake disc|s| excessively worn |3.2.A1l| | 2 |
| Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 2 |
| Nearside Rear Footrest missing |6.2.12 |a|| | 2 |
| Drive chain excessively tight |6.2.1d| | 2 |
| Front Roller brake test indicates a sticking brake |3.3.A1a| | 2 |
| Nearside Handlebar grip insecure to handlebar |2.2.1 |d| |ii|| | 2 |
| Headlamp not working on dipped beam |4.1.1 |a| |ii|| | 2 |
| Steering movement excessively `notchy` with the wheel raised |2.2.1b| | 2 |
| Front Valve stem seriously damaged |5.2.3 |j|| | 2 |
| Rear Valve stem seriously damaged |5.2.3 |j|| | 2 |
| Nearside Front Front shock absorber seal failed and leaking oil |2.3.3| | 2 |
| Rear All direction indicators obviously incorrectly positioned (4.4.3 (a)) | 2 |
| Nearside Front Direction indicator not working (4.4.1 (a) (ii)) | 2 |
| Front Valve stem seriously damaged (5.2.3 (j)) | 2 |
| Rear Direction indicator adversely affected by the operation of another lamp (4.4.3 (b)) | 2 |
| Front Brake lever has insufficient reserve travel (1.1.2 (a)) | 2 |
| Headlamp aim so that beam "kick up" is not visible on the screen (4.1.2 (a)) | 2 |
| Front Stop lamp does not illuminate by the operation of both brake controls (4.3.2 (a) (iii)) | 2 |
| Offside Rear Direction indicator not working (4.4.1 (a) (ii)) | 2 |
| Front Brake fluid contaminated (1.8 (a)) | 2 |
| Rear Brake fluid contaminated (1.8 (a)) | 2 |