| Most common failures | No# failures |
|---|
| Registration plate lamp issues | 308 |
| Steering headbearing excessively stiff or notchy (2.2.2 (f) (i)) | 58 |
| Horn not working (7.7 (a)) | 58 |
| Headlamp aim out of alignment | 57 |
| Stop lamp remains on when the brakes are released | 47 |
| Front Wheel bearing has excessive play (5.1.3 (a) (i)) | 40 |
| Rear Shock absorber has negligible damping effect (5.3.2 (b)) | 36 |
| Rear reflector missing (4.8.2 (a) (ii)) | 35 |
| Steering headbearing has excessive wear or free play (2.2.2 (f) (i)) | 30 |
| Nearside Handlebar grip insecure to handlebar (2.2.1 (d) (ii)) | 23 |
| Rear Rear reflector missing (4.8.2 (a) (ii)) | 21 |
| Rear Brake disc significantly and obviously worn (1.1.14 (a) (i)) | 20 |
| Registration plate issues | 20 |
| Front Wheel bearing rough when rotated (5.1.3 (b) (i)) | 19 |
| Nearside Rear Shock absorber has a serious fluid leak (5.3.2 (b)) | 19 |
| Front Brake disc significantly and obviously worn (1.1.14 (a) (i)) | 16 |
| Rear Shock absorber has a serious fluid leak (5.3.2 (b)) | 16 |
| Offside Rear Shock absorber has a serious fluid leak (5.3.2 (b)) | 16 |
| Nearside Front Direction indicator incorrect colour (4.4.3 (a)) | 14 |
| Offside Front Direction indicator incorrect colour (4.4.3 (a)) | 14 |
| Offside Rear Shock absorber has negligible damping effect (5.3.2 (b)) | 12 |
| Rear Stop lamp not working (4.3.1 (a) (ii)) | 11 |
| Front Steering headbearing excessively stiff or notchy (2.2.2 (f) (i)) | 11 |
| Front Brake indicates excessive fluctuation of brake effort (1.2.1 (e)) | 10 |
| Nearside Rear Shock absorber has negligible damping effect (5.3.2 (b)) | 10 |
| Nearside Front Shock absorber has a serious fluid leak (5.3.2 (b)) | 9 |
| Nearside Front Direction indicator not working (4.4.1 (a) (ii)) | 8 |
| Offside Rear Direction indicator not working (4.4.1 (a) (ii)) | 8 |
| Nearside Rear Direction indicator not working (4.4.1 (a) (ii)) | 8 |
| Offside Front Direction indicator not working (4.4.1 (a) (ii)) | 7 |
| Brake performance unable to be tested (1.2.1 (g)) | 7 |
| Headlamp aim projected beam image obviously incorrect (4.1.2 (c)) | 7 |
| Front Steering operation restricted in free movement from lock to lock (2.1.4 (c)) | 7 |
| Rear brake disc in such a condition that it is seriously weakened | 6 |
| Front Valve stem seriously damaged (5.2.3 (j)) | 6 |
| Front Wheel excessively distorted (5.2.2 (c) (i)) | 6 |
| Horn sound not in accordance with requirements (7.7 (c)) | 5 |
| Front Wheel alignment incorrect which adversely affects the steering (2.4 (a)) | 5 |
| Rear Brake indicates excessive fluctuation of brake effort (1.2.1 (e)) | 5 |
| Headlamp insecure (4.1.1 (c)) | 5 |
| Front Brake lever is bent and the brake cannot be readily applied (1.1.2 (d)) | 5 |
| Front Brake caliper insecure (1.1.16 (c) (i)) | 5 |
| Nearside Front Handlebar grip insecure to handlebar (2.2.1 (d) (ii)) | 5 |
| Front brake disc in such a condition that it is seriously weakened | 4 |
| Front Wheel bearing play so excessive it is likely to break up (5.1.3 (a) (ii)) | 4 |
| Rear Wheel fixing loose (single fixing) (5.2.1 (a) (ii)) | 4 |
| Offside Front Shock absorber has a serious fluid leak (5.3.2 (b)) | 4 |
| Offside Rear Footrest missing (6.2.12 (a)) | 4 |
| Stop lamp not working (4.3.1 (a) (ii)) | 4 |
| Front Valve stem seriously misaligned (5.2.3 (j)) | 4 |
| Throttle operating incorrectly (6.2.7 (a) (i)) | 4 |
| Handlebar grip insecure to handlebar (2.2.1 (d) (ii)) | 4 |
| Front Steering headbearing has excessive wear or free play (2.2.2 (f) (i)) | 4 |
| Front Wheel alignment incorrect which adversely affects the handling (2.4 (a)) | 3 |
| Rear Brake lining(s) less than 1.0 mm thick (1.1.13 (a)) | 3 |
| Throttle control functioning such that safe operation of the motorcycle is adversely affected (6.2.7 (a) (ii)) | 3 |
| Front Brake grabbing severely (1.2.1 (c)) | 3 |
| Headlamp not working on main beam (4.1.1 (a) (ii)) | 3 |
| Front Wheel more than one fixing loose (5.2.1 (a) (ii)) | 3 |
| Shock absorber likely to become detached (5.3.2 (a) (ii)) | 3 |
| Exhaust has a major leak of exhaust gases (6.1.2 (a)) | 3 |
| Front Wheel bearing play so excessive that directional control is impaired (5.1.3 (a) (ii)) | 3 |
| Fuel cap ineffective (6.1.3 (b) (i)) | 3 |