| Most common failures | No# failures |
|---|
| Headlamp aim out of alignment | 193 |
| Registration plate issues | 22 |
| Horn not working (7.7 (a) (ii)) | 21 |
| Registration plate lamp issues | 19 |
| Front Brake excessively binding (1.2.1 (f)) | 18 |
| Front Stop lamp not working (4.3.1 (a) (ii)) | 16 |
| Nearside Front Shock absorber has a serious fluid leak (5.3.2 (b)) | 15 |
| Rear Shock absorber has negligible damping effect (5.3.2 (b)) | 15 |
| Steering headbearing excessively stiff or notchy (2.2.2 (f) (i)) | 13 |
| Rear Brake indicates excessive fluctuation of brake effort (1.2.1 (e)) | 11 |
| Rear reflector missing (4.8.2 (a) (ii)) | 11 |
| Front Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 10 |
| Front Brake indicates excessive fluctuation of brake effort (1.2.1 (e)) | 10 |
| Drive chain excessively loose (6.1.7 (c) (i)) | 10 |
| Rear Brake excessively binding (1.2.1 (f)) | 10 |
| Horn not working (7.7 (a)) | 9 |
| Front Brake excessively binding |1.2.1 |f|| | 8 |
| Front Stop lamp not working |4.3.1 |a| |ii|| | 8 |
| Headlamp not working on dipped beam (4.1.1 (a) (ii)) | 8 |
| Offside Front Shock absorber has a serious fluid leak (5.3.2 (b)) | 7 |
| Front Roller brake test indicates a binding brake |3.3.A1a| | 6 |
| Drive chain excessively loose |6.2.1d| | 6 |
| Stop lamp remains on when the brakes are released | 6 |
| Front Wheel bearing has excessive play |5.1.3 |a| |i|| | 6 |
| Drive chain excessively loose |6.1.7 |c| |i|| | 6 |
| Rear reflector on motorcycle missing |1.4.1| | 6 |
| Front Wheel bearing has excessive play (5.1.3 (a) (i)) | 6 |
| Front wheel bearings have excessive free play |2.3.5b| | 5 |
| Steering movement excessively `notchy` with the weight on the lower bearing |2.2.1a| | 5 |
| Rear reflector missing |4.8.2 |a| |ii|| | 5 |
| Steering headbearing excessively stiff or notchy |2.2.2 |f| |i|| | 5 |
| Stop lamp not working (4.3.1 (a) (ii)) | 5 |
| Front Position lamp not working (4.2.1 (a)) | 5 |
| Rear Brake disc significantly and obviously worn (1.1.14 (a) (i)) | 5 |
| Drive chain excessively tight (6.1.7 (k) (i)) | 5 |
| Drive chain worn to excess (6.1.7 (c) (i)) | 5 |
| Rear Brake excessively binding |1.2.1 |f|| | 4 |
| Nearside Front Shock absorber has a serious fluid leak |5.3.2 |b|| | 4 |
| Front Floor brake test indicates a binding brake |3.3.C2c| | 4 |
| Horn not working |7.7 |a| |ii|| | 4 |
| Steering movement excessively `notchy` with the wheel raised |2.2.1b| | 4 |
| Front Wheel bearing rough when rotated (5.1.3 (b) (i)) | 4 |
| Horn sound not in accordance with requirements (7.7 (c)) | 4 |
| Rear Stop lamp not working (4.3.1 (a) (ii)) | 4 |
| Nearside Front Direction indicator not working (4.4.1 (a) (ii)) | 4 |
| Rear Wheel bearing has excessive play (5.1.3 (a) (i)) | 4 |
| Front Shock absorber has a serious fluid leak (5.3.2 (b)) | 4 |
| Front Stop lamp does not illuminate by the operation of both brake controls (4.3.2 (a) (iii)) | 4 |
| Front Wheel bearing rough when rotated |5.1.3 |b| |i|| | 3 |
| Headlamp at least one does not illuminate on dipped beam |1.2.2a|i|| | 3 |
| Steering headbearing has excessive free play |2.2.2| | 3 |
| Drive chain worn to excess |6.2.1e| | 3 |
| Throttle has a significant change in engine speed whilst moving the steering from lock to lock |2.1.4| | 3 |
| Front Steering movement excessively `notchy` with the wheel raised |2.2.1b| | 3 |
| Rear Floor brake test indicates a binding brake |3.3.C2c| | 3 |
| Nearside Front Direction indicator not working |4.4.1 |a| |ii|| | 3 |
| Drive chain excessively tight |6.2.1d| | 3 |
| Headlamp not working on dipped beam |4.1.1 |a| |ii|| | 3 |
| Steering headbearing has excessive wear or free play (2.2.2 (f) (i)) | 3 |
| Rear Drive chain excessively loose (6.1.7 (c) (i)) | 3 |
| Rear Drive chain worn to excess (6.1.7 (c) (i)) | 3 |
| Stop lamp does not illuminate by the operation of both brake controls (4.3.2 (a) (iii)) | 3 |
| Nearside Handlebar grip insecure to handlebar (2.2.1 (d) (ii)) | 3 |
| Headlamp aim projected beam image obviously incorrect (4.1.2 (c)) | 3 |