| Most common failures | No# failures |
|---|
| Headlamp aim out of alignment | 259 |
| Registration plate issues | 73 |
| Nearside Front Shock absorber has a serious fluid leak (5.3.2 (b)) | 72 |
| Offside Front Shock absorber has a serious fluid leak (5.3.2 (b)) | 46 |
| Front Brake excessively binding (1.2.1 (f)) | 39 |
| Rear Shock absorber has negligible damping effect (5.3.2 (b)) | 34 |
| Front Stop lamp not working (4.3.1 (a) (ii)) | 34 |
| Registration plate lamp issues | 30 |
| Rear Brake excessively binding (1.2.1 (f)) | 29 |
| Rear reflector missing (4.8.2 (a) (ii)) | 26 |
| Horn not working (7.7 (a)) | 25 |
| Front Roller brake test indicates a binding brake |3.3.A1a| | 22 |
| Drive chain excessively loose |6.2.1d| | 20 |
| Headlamp not working on dipped beam (4.1.1 (a) (ii)) | 20 |
| Front Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 18 |
| Drive chain excessively loose (6.1.7 (c) (i)) | 18 |
| Nearside Front shock absorber seal failed and leaking oil |2.3.3| | 17 |
| Steering movement excessively `notchy` with the wheel raised |2.2.1b| | 16 |
| Rear reflector on motorcycle missing |1.4.1| | 16 |
| Horn not working |1.7.3a| | 15 |
| Front Stop lamp not working |4.3.1 |a| |ii|| | 13 |
| Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 12 |
| Offside Front shock absorber seal failed and leaking oil |2.3.3| | 12 |
| Horn not working |7.7 |a| |ii|| | 12 |
| Front Wheel bearing has excessive play (5.1.3 (a) (i)) | 12 |
| Front Shock absorber has a serious fluid leak (5.3.2 (b)) | 12 |
| Offside Front Front shock absorber seal failed and leaking oil |2.3.3| | 11 |
| Steering headbearing excessively stiff or notchy (2.2.2 (f) (i)) | 11 |
| Front Brake indicates excessive fluctuation of brake effort (1.2.1 (e)) | 11 |
| Offside Front Brake disc contaminated (1.1.14 (b)) | 11 |
| Drive chain worn to excess |6.2.1e| | 9 |
| Steering movement excessively `notchy` with the weight on the lower bearing |2.2.1a| | 9 |
| Horn not working (7.7 (a) (ii)) | 9 |
| Nearside Front Shock absorber has a serious fluid leak |5.3.2 |b|| | 8 |
| Rear shock absorber has inadequate damping effect. |2.4.A.3b| | 8 |
| Drive chain excessively loose |6.1.7 |c| |i|| | 8 |
| Steering headbearing has excessive free play |2.2.2| | 8 |
| Headlamp at least one does not illuminate on dipped beam |1.2.2a|i|| | 8 |
| Nearside Front Direction indicator not working (4.4.1 (a) (ii)) | 8 |
| Headlamp not working on main beam (4.1.1 (a) (ii)) | 8 |
| Rear Stop lamp not working (4.3.1 (a) (ii)) | 8 |
| Nearside Front Brake disc contaminated (1.1.14 (b)) | 8 |
| Rear Brake indicates excessive fluctuation of brake effort (1.2.1 (e)) | 8 |
| Drive chain excessively tight |6.2.1d| | 7 |
| Rear Brake excessively binding |1.2.1 |f|| | 7 |
| Nearside Handlebar grip insecure to handlebar (2.2.1 (d) (ii)) | 7 |
| Nearside Rear Direction indicator not working (4.4.1 (a) (ii)) | 7 |
| Front Stop lamp does not illuminate by the operation of both brake controls (4.3.2 (a) (iii)) | 7 |
| Rear Position lamp not working (4.2.1 (a)) | 7 |
| Stop lamp does not illuminate by the operation of both brake controls (4.3.2 (a) (iii)) | 7 |
| Offside Front Shock absorber has a serious fluid leak |5.3.2 |b|| | 6 |
| Front Roller brake test indicates excessive fluctuation of brake effort |3.3.A1d| | 6 |
| Front position lamp does not illuminate immediately when switched on |1.1.3a| | 6 |
| Nearside Front Front shock absorber seal failed and leaking oil |2.3.3| | 6 |
| Rear reflector missing |4.8.2 |a| |ii|| | 6 |
| Front Brake excessively binding |1.2.1 |f|| | 6 |
| Front Position lamp not working (4.2.1 (a)) | 6 |
| Stop lamp remains on when the brakes are released | 6 |
| Front Wheel bearing rough when rotated (5.1.3 (b) (i)) | 6 |
| Steering headbearing has excessive wear or free play (2.2.2 (f) (i)) | 6 |
| Rear Wheel bearing has excessive play (5.1.3 (a) (i)) | 6 |
| Rear Shock absorber has negligible damping effect |5.3.2 |b|| | 5 |
| Front shock absorber seal failed and leaking oil |2.3.3| | 5 |
| Rear Roller brake test indicates excessive fluctuation of brake effort |3.3.A1d| | 5 |
| Drive chain worn to excess (6.1.7 (c) (i)) | 5 |
| Exhaust has a major leak of exhaust gases (6.1.2 (a)) | 5 |
| Rear Rear reflector missing (4.8.2 (a) (ii)) | 5 |
| Front Steering headbearing excessively stiff or notchy (2.2.2 (f) (i)) | 5 |
| Roller brake test The less effective brake control does not achieve an efficiency of 25% (1.2.2 (a) (i)) | 5 |
| Drive chain excessively tight (6.1.7 (k) (i)) | 5 |