| Most common failures | No# failures |
|---|
| Headlamp aim out of alignment | 47 |
| Registration plate lamp issues | 35 |
| Rear reflector on motorcycle missing |1.4.1| | 30 |
| Registration plate issues | 30 |
| Drive chain excessively loose |6.2.1d| | 17 |
| Front Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 15 |
| Rear reflector missing (4.8.2 (a) (ii)) | 10 |
| Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 8 |
| Front Valve stem seriously damaged (5.2.3 (j)) | 7 |
| Drive chain excessively loose |6.1.7 |c| |i|| | 6 |
| Drive chain worn to excess |6.2.1e| | 6 |
| Horn not working |1.7.3a| | 5 |
| Front Brake excessively binding (1.2.1 (f)) | 5 |
| Stop lamp not working (4.3.1 (a) (ii)) | 4 |
| Front Roller brake test indicates a binding brake |3.3.A1a| | 4 |
| Horn not working (7.7 (a) (ii)) | 4 |
| Nearside Front Shock absorber has a serious fluid leak (5.3.2 (b)) | 4 |
| Nearside Handlebar grip insecure to handlebar (2.2.1 (d) (ii)) | 4 |
| Stop lamp remains on when the brakes are released | 4 |
| Steering headbearing excessively stiff or notchy (2.2.2 (f) (i)) | 4 |
| Steering movement excessively `notchy` with the wheel raised |2.2.1b| | 4 |
| Nearside Handlebar handgrip not secure to handlebars. |2.1.1c| | 4 |
| Front Stop lamp not working (4.3.1 (a) (ii)) | 3 |
| Front Stop lamp not working |4.3.1 |a| |ii|| | 3 |
| Rear Drive chain sprocket worn to excess |6.2.1e| | 3 |
| Drive chain worn to excess (6.1.7 (c) (i)) | 3 |
| Offside Front Shock absorber has a serious fluid leak (5.3.2 (b)) | 3 |
| Steering headbearing has excessive free play |2.2.2| | 3 |
| Front Front wheel bearings have excessive free play |2.3.5b| | 3 |
| Headlamp at least one does not illuminate on dipped beam |1.2.2a|i|| | 3 |
| Front Valve stem seriously damaged |5.2.3 |j|| | 3 |
| Front Wheel bearing has excessive play (5.1.3 (a) (i)) | 3 |
| Rear Valve stem seriously damaged |5.2.3 |j|| | 2 |
| Drive chain excessively tight (6.1.7 (k) (i)) | 2 |
| Wheel alignment incorrect which adversely affects the steering (2.4 (a)) | 2 |
| Nearside Rear Drive chain excessively loose |6.2.1d| | 2 |
| Offside Front Brake disc contaminated (1.1.14 (b)) | 2 |
| Front Position lamp not working (4.2.1 (a)) | 2 |
| Drive chain so worn it is likely to fail (6.1.7 (c) (ii)) | 2 |
| Front Brake lever has inadequate reserve travel |3.1.3b| | 2 |
| Headlamp not working on dipped beam |4.1.1 |a| |ii|| | 2 |
| Front shock absorber seal failed and leaking oil |2.3.3| | 2 |
| Offside Rear Direction indicator not working (4.4.1 (a) (ii)) | 2 |
| Rear Stop lamp not working (4.3.1 (a) (ii)) | 2 |
| Offside Front Shock absorber has a serious fluid leak |5.3.2 |b|| | 2 |
| Rear reflector missing |4.8.2 |a| |ii|| | 2 |
| Front Wheel bearing has excessive play |5.1.3 |a| |i|| | 2 |
| Horn not working |7.7 |a| |ii|| | 2 |
| Headlamp at least one does not illuminate on main beam |1.2.2a|ii|| | 2 |
| Drive chain excessively loose (6.1.7 (c) (i)) | 2 |
| Front Wheel bearing play so excessive it is likely to break up (5.1.3 (a) (ii)) | 2 |
| Front Floor brake test indicates a binding brake |3.3.C2c| | 2 |
| Drive chain worn to excess |6.1.7 |c| |i|| | 2 |
| Front position lamp does not illuminate immediately when switched on |1.1.3a| | 2 |
| Front Brake excessively binding |1.2.1 |f|| | 2 |
| Rear reflector on motorcycle incorrectly positioned |1.4.2d| | 2 |
| Handlebar deformed |2.1.1b| | 2 |