| Most common failures | No# failures |
|---|
| Headlamp not working on dipped beam (4.1.1 (a) (ii)) | 15 |
| Front Valve stem seriously damaged (5.2.3 (j)) | 14 |
| Headlamp aim out of alignment | 13 |
| Rear reflector missing (4.8.2 (a) (ii)) | 11 |
| Headlamp not working on main beam (4.1.1 (a) (ii)) | 11 |
| Rear Brake excessively binding (1.2.1 (f)) | 10 |
| Rear Valve stem seriously damaged (5.2.3 (j)) | 10 |
| Stop lamp remains on when the brakes are released | 8 |
| Horn not working (7.7 (a)) | 7 |
| Front Brake excessively binding (1.2.1 (f)) | 7 |
| Registration plate lamp issues | 6 |
| Front Headlamp not working on dipped beam (4.1.1 (a) (ii)) | 5 |
| Headlamp aim unable to be tested (4.1.2 (b)) | 5 |
| Headlamp aim projected beam image obviously incorrect (4.1.2 (c)) | 3 |
| Rear Stop lamp not working (4.3.1 (a) (ii)) | 3 |
| Offside Rear Direction indicator not working (4.4.1 (a) (ii)) | 3 |
| Rear Rear reflector missing (4.8.2 (a) (ii)) | 3 |
| Front Headlamp not working on main beam (4.1.1 (a) (ii)) | 3 |
| Rear Brake grabbing severely (1.2.1 (c)) | 2 |
| Front Headlamp aim unable to be tested (4.1.2 (b)) | 2 |
| Nearside Handlebar grip insecure to handlebar (2.2.1 (d) (ii)) | 2 |
| Nearside Front Direction indicator not working (4.4.1 (a) (ii)) | 2 |
| Nearside Rear Direction indicator not working (4.4.1 (a) (ii)) | 2 |
| Steering headbearing has excessive wear or free play (2.2.2 (f) (i)) | 2 |
| Roller brake test The less effective brake control does not achieve an efficiency of 25% (1.2.2 (a) (i)) | 2 |
| Front Stop lamp does not illuminate by the operation of both brake controls (4.3.2 (a) (iii)) | 2 |
| Stop lamp does not illuminate by the operation of both brake controls (4.3.2 (a) (iii)) | 2 |
| Central Front Steering headbearing has excessive wear or free play (2.2.2 (f) (i)) | 2 |
| Rear Valve stem seriously misaligned (5.2.3 (j)) | 1 |
| Central Front Upper Headlamp not working on dipped beam (4.1.1 (a) (ii)) | 1 |
| Rear Position lamp adversely affected by the operation of another lamp (4.2.3 (b)) | 1 |
| Nearside Front Shock absorber has negligible damping effect (5.3.2 (b)) | 1 |
| Offside Front Shock absorber has negligible damping effect (5.3.2 (b)) | 1 |
| Front Brake component inadequately mounted (1.1.21 (c)) | 1 |
| Nearside Front Lower Brake excessively binding (1.2.1 (f)) | 1 |
| Headlamp reflector missing (4.1.1 (b) (ii)) | 1 |
| Central Front Horn not working (7.7 (a)) | 1 |
| Central Front Headlamp not working on dipped beam (4.1.1 (a) (ii)) | 1 |
| Headlamp aim so that beam "kick up" is not visible on the screen (4.1.2 (a)) | 1 |
| Steering headbearing excessively stiff or notchy (2.2.2 (f) (i)) | 1 |
| Dipswitch does not operate immediately when selected on dipped beam (4.1.3 (b)) | 1 |
| Headlamp aim projected beam image obviously incorrect headlamp operation incorrect (4.1.2 (c)) | 1 |
| Front Position lamp switch does not operate in accordance with the requirements (4.2.2 (a)) | 1 |
| Front Suspension component modified so the suspension is inoperative (5.3.3 (c) (ii)) | 1 |
| Registration plate issues | 1 |
| Central Front Headlamp aim projected beam image obviously incorrect (4.1.2 (c)) | 1 |
| Rear Brake lever not releasing correctly and functionality of brakes affected (1.1.2 (b) (ii)) | 1 |
| Offside Front Wheel excessively damaged (5.2.2 (c) (i)) | 1 |
| Offside Rear Brake caliper insecure (1.1.16 (c) (i)) | 1 |
| Central Front Lower Horn not working (7.7 (a)) | 1 |
| Front Position lamp light intensity significantly reduced (4.2.3 (a) (ii)) | 1 |
| Horn not working button missing (7.7 (a)) | 1 |
| Brake excessively binding Master cylinder sticking (1.2.1 (f)) | 1 |
| Rear Valve stem seriously damaged perished/split (5.2.3 (j)) | 1 |
| Rear Position lamp not working (4.2.1 (a)) | 1 |
| Exhaust system insecure (6.1.2 (a)) | 1 |
| Exhaust has a major leak of exhaust gases (6.1.2 (a)) | 1 |
| Rear brake disc in such a condition that it is seriously weakened | 1 |
| Nearside Front Brake lever has insufficient reserve travel (1.1.2 (a)) | 1 |
| Brake performance unable to be tested (1.2.1 (g)) | 1 |
| Front Brake lever has restricted free movement (1.1.15 (e)) | 1 |
| Rear Brake lever has restricted free movement (1.1.15 (e)) | 1 |
| Front Brake disc significantly and obviously worn (1.1.14 (a) (i)) | 1 |
| Rear Brake indicates excessive fluctuation of brake effort (1.2.1 (e)) | 1 |
| Position lamp not working (4.2.1 (a)) | 1 |
| Front Position lamp not working (4.2.1 (a)) | 1 |
| Front Brake excessively binding calliper binding supply and fit new calliper (1.2.1 (f)) | 1 |
| Rear reflector missing covered by mud flap (4.8.2 (a) (ii)) | 1 |
| Front Position lamp not working side light (4.2.1 (a)) | 1 |
| Stop lamp does not illuminate by the operation of both brake controls rear control (4.3.2 (a) (iii)) | 1 |
| Central Front Brake excessively binding (1.2.1 (f)) | 1 |