| Most common failures | No# failures |
|---|
| Headlamp aim out of alignment | 114 |
| Registration plate lamp issues | 104 |
| Stop lamp remains on when the brakes are released | 40 |
| Rear Stop lamp not working (4.3.1 (a) (ii)) | 32 |
| Registration plate issues | 27 |
| Stop lamp not working (4.3.1 (a) (ii)) | 23 |
| Headlamp not working on dipped beam (4.1.1 (a) (ii)) | 19 |
| Front Stop lamp not working (4.3.1 (a) (ii)) | 17 |
| Stop lamp does not illuminate by the operation of both brake controls (4.3.2 (a) (iii)) | 17 |
| Headlamp not working on main beam (4.1.1 (a) (ii)) | 10 |
| Rear Position lamp not working (4.2.1 (a)) | 10 |
| Stop lamp not working |4.3.1 |a| |ii|| | 9 |
| Riders seat insecure (6.2.5 (a) (ii)) | 9 |
| Front Wheel bearing has excessive play (5.1.3 (a) (i)) | 9 |
| Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 8 |
| Rear Stop lamp does not illuminate by the operation of both brake controls (4.3.2 (a) (iii)) | 8 |
| Front Headlamp not working on dipped beam (4.1.1 (a) (ii)) | 7 |
| Offside Rear Shock absorber has a serious fluid leak (5.3.2 (b)) | 7 |
| Front Brake disc significantly and obviously worn (1.1.14 (a) (i)) | 7 |
| Front Position lamp not working (4.2.1 (a)) | 7 |
| Headlamp not working on dipped beam |4.1.1 |a| |ii|| | 6 |
| Offside Front Position lamp not working (4.2.1 (a)) | 5 |
| Front position lamp does not illuminate immediately when switched on |1.1.3a| | 5 |
| Headlamp at least one does not illuminate on dipped beam |1.2.2a|i|| | 5 |
| Horn not working (7.7 (a)) | 5 |
| Front Brake lever is so short that the brake cannot be readily applied (1.1.2 (d)) | 5 |
| Rear Brake disc significantly and obviously worn (1.1.14 (a) (i)) | 5 |
| Rear Position lamp not working |4.2.1 |a|| | 5 |
| Front Brake indicates excessive fluctuation of brake effort (1.2.1 (e)) | 5 |
| Nearside Stop lamp not working (4.3.1 (a) (ii)) | 5 |
| Nearside Handlebar grip insecure to handlebar (2.2.1 (d) (ii)) | 5 |
| Throttle operating incorrectly (6.2.7 (a) (i)) | 5 |
| Front Wheel bearing rough when rotated (5.1.3 (b) (i)) | 5 |
| Rear Stop lamp not working |4.3.1 |a| |ii|| | 5 |
| Headlamp switch faulty |1.2.4| | 4 |
| Steering headbearing has excessive wear or free play (2.2.2 (f) (i)) | 4 |
| Nearside Rear Shock absorber has a serious fluid leak (5.3.2 (b)) | 4 |
| Horn sound not in accordance with requirements (7.7 (c)) | 4 |
| Front Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 4 |
| Nearside Front Position lamp not working (4.2.1 (a)) | 4 |
| Front Stop lamp not working |4.3.1 |a| |ii|| | 4 |
| Rear position lamp does not illuminate immediately when it is switched on |1.1.3a| | 4 |
| Dipswitch does not operate immediately when selected on main beam (4.1.3 (b)) | 3 |
| Rear Shock absorber has negligible damping effect (5.3.2 (b)) | 3 |
| Rear Wheel bearing has excessive play (5.1.3 (a) (i)) | 3 |
| Steering headbearing excessively stiff or notchy (2.2.2 (f) (i)) | 3 |
| Horn not working (7.7 (a) (ii)) | 3 |
| Roller brake test The less effective brake control does not achieve an efficiency of 25% (1.2.2 (a) (i)) | 3 |
| Offside Front Shock absorber has a serious fluid leak (5.3.2 (b)) | 3 |
| Rear brake disc in such a condition that it is seriously weakened | 3 |
| Front Stop lamp does not illuminate by the operation of both brake controls (4.3.2 (a) (iii)) | 3 |
| Rear Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 3 |
| Nearside Rear Position lamp not working (4.2.1 (a)) | 3 |
| Headlamp aim unable to be tested (4.1.2 (b)) | 3 |
| Steering movement excessively `notchy` with the wheel raised |2.2.1b| | 3 |
| Nearside Front Position lamp not working |4.2.1 |a|| | 3 |
| Headlamp aim not tested (4.1.2 (b)) | 3 |
| Headlamp aim projected beam image obviously incorrect (4.1.2 (c)) | 3 |
| Rear Brake lining(s) less than 1.0 mm thick (1.1.13 (a)) | 2 |
| Front Position lamp not working |4.2.1 |a|| | 2 |
| Nearside Front Front position lamp does not illuminate immediately when switched on |1.1.3a| | 2 |
| Front Headlamp at least one does not illuminate on dipped beam |1.2.2a|i|| | 2 |
| Rear Shock absorber likely to become detached (5.3.2 (a) (ii)) | 2 |
| Riders seat insecure |6.2.5 |a| |ii|| | 2 |
| Nearside Front Shock absorber has a serious fluid leak |5.3.2 |b|| | 2 |
| Rear Wheel bearing play so excessive it is likely to break up (5.1.3 (a) (ii)) | 2 |
| Front Position lamp not working Both (4.2.1 (a)) | 2 |
| Front Shock absorber has negligible damping effect (5.3.2 (b)) | 2 |
| Front Headlamp not working on main beam (4.1.1 (a) (ii)) | 2 |
| Rear All position lamps not working (4.2.1 (a)) | 2 |
| Dipswitch does not operate immediately when selected on dipped beam (4.1.3 (b)) | 2 |
| Nearside Handlebar grip insecure to handlebar |2.2.1 |d| |ii|| | 2 |
| Nearside Front Handlebar grip insecure to handlebar (2.2.1 (d) (ii)) | 2 |
| Offside Rear Position lamp not working (4.2.1 (a)) | 2 |
| Rear Valve stem seriously damaged (5.2.3 (j)) | 2 |
| Central Rear Stop lamp does not illuminate by the operation of both brake controls (4.3.2 (a) (iii)) | 2 |
| Front Headlamp aim headlamp damaged and function impaired |1.2.3a| | 2 |
| Headlamp insecure (4.1.1 (c)) | 2 |
| Front Wheel bearing so rough it is likely to overheat or break up (5.1.3 (b) (ii)) | 2 |
| Rear Shock absorber has a serious fluid leak (5.3.2 (b)) | 2 |
| Handlebar restricted in free movement from lock to lock (2.1.4 (c)) | 2 |
| Front Wheel alignment incorrect which adversely affects the steering (2.4 (a)) | 2 |
| Rear Brake disc significantly and obviously worn |1.1.14 |a| |i|| | 2 |
| Front Wheel bearing play so excessive it is likely to break up (5.1.3 (a) (ii)) | 2 |
| Stop lamp remains on when the brake is released |1.3.1e| | 2 |
| Throttle operating incorrectly |6.2.7 |a| |i|| | 2 |
| Steering operation restricted in free movement from lock to lock (2.1.4 (c)) | 2 |
| Front Brake disc contaminated (1.1.14 (b)) | 2 |
| Front Steering headbearing excessively stiff or notchy (2.2.2 (f) (i)) | 2 |
| Rear Brake lever is so short that the brake cannot be readily applied (1.1.2 (d)) | 2 |
| Offside Front Position lamp not working |4.2.1 |a|| | 2 |
| Front Roller brake test indicates excessive fluctuation of brake effort |3.3.A1d| | 2 |
| Brake performance not tested |3.3| | 2 |
| Front Steering headbearing has excessive wear or free play (2.2.2 (f) (i)) | 2 |
| Position lamp not working (4.2.1 (a)) | 2 |
| Rear Wheel excessively distorted (5.2.2 (c) (i)) | 2 |
| Front Brake lever has insufficient reserve travel (1.1.2 (a)) | 2 |
| Rear Brake indicates excessive fluctuation of brake effort (1.2.1 (e)) | 2 |
| Throttle control functioning such that safe operation of the motorcycle is adversely affected (6.2.7 (a) (ii)) | 2 |
| Front Wheel bearing play so excessive that directional control is impaired (5.1.3 (a) (ii)) | 2 |