| Most common failures | No# failures |
|---|
| Rear reflector missing (4.8.2 (a) (ii)) | 113 |
| Headlamp aim out of alignment | 111 |
| Registration plate issues | 59 |
| Front Brake excessively binding (1.2.1 (f)) | 38 |
| Drive chain excessively loose (6.1.7 (c) (i)) | 31 |
| Registration plate lamp issues | 29 |
| Rear Brake excessively binding (1.2.1 (f)) | 29 |
| Rear Rear reflector missing (4.8.2 (a) (ii)) | 21 |
| Steering headbearing excessively stiff or notchy (2.2.2 (f) (i)) | 16 |
| Rear Stop lamp not working (4.3.1 (a) (ii)) | 15 |
| Front Brake indicates excessive fluctuation of brake effort (1.2.1 (e)) | 12 |
| Drive chain worn to excess (6.1.7 (c) (i)) | 11 |
| Stop lamp remains on when the brakes are released | 10 |
| Offside Rear Direction indicator not working (4.4.1 (a) (ii)) | 10 |
| Nearside Handlebar grip insecure to handlebar (2.2.1 (d) (ii)) | 10 |
| Exhaust noise is clearly in excess of that emitted by a similar motorcycle fitted with a standard silencer in average condition (8.1.1 (a)) | 9 |
| Front Wheel bearing play so excessive it is likely to break up (5.1.3 (a) (ii)) | 9 |
| Drive chain horseshoe locking device incorrectly fitted (6.1.7 (j) (i)) | 8 |
| Front Wheel bearing has excessive play (5.1.3 (a) (i)) | 8 |
| Rear Position lamp not working (4.2.1 (a)) | 7 |
| Nearside Rear Direction indicator not working (4.4.1 (a) (ii)) | 7 |
| Rear Stop lamp does not illuminate by the operation of both brake controls (4.3.2 (a) (iii)) | 7 |
| Drive chain so loose it is likely to fail (6.1.7 (c) (ii)) | 7 |
| Roller brake test The less effective brake control does not achieve an efficiency of 25% (1.2.2 (a) (i)) | 6 |
| Front Stop lamp not working (4.3.1 (a) (ii)) | 6 |
| Horn not working (7.7 (a)) | 6 |
| Nearside Front Shock absorber has a serious fluid leak (5.3.2 (b)) | 6 |
| Drive chain excessively tight (6.1.7 (k) (i)) | 6 |
| Nearside Rear Footrest missing (6.2.12 (a)) | 5 |
| Drive chain so worn it is likely to fail (6.1.7 (c) (ii)) | 5 |
| Drive chain sprocket worn to excess (6.1.7 (c) (i)) | 5 |
| Front Steering headbearing excessively stiff or notchy (2.2.2 (f) (i)) | 5 |
| Rear Drive chain sprocket worn to excess (6.1.7 (c) (i)) | 5 |
| Front Brake lever has insufficient reserve travel (1.1.2 (a)) | 5 |
| Rear Drive chain excessively loose (6.1.7 (c) (i)) | 4 |
| Rear brake disc in such a condition that it is seriously weakened | 4 |
| Headlamp aim projected beam image obviously incorrect (4.1.2 (c)) | 4 |
| Front Wheel bearing play so excessive that directional control is impaired (5.1.3 (a) (ii)) | 4 |
| Wheel alignment incorrect which adversely affects the steering (2.4 (a)) | 4 |
| Central Rear Rear reflector missing (4.8.2 (a) (ii)) | 4 |
| Front Wheel bearing rough when rotated (5.1.3 (b) (i)) | 4 |
| Rear Brake pedal has insufficient reserve travel (1.1.2 (a)) | 4 |
| Nearside Front Handlebar grip insecure to handlebar (2.2.1 (d) (ii)) | 3 |
| Headlamp not working on dipped beam (4.1.1 (a) (ii)) | 3 |
| Front Horn not working (7.7 (a)) | 3 |
| Nearside Rear Direction indicator with a multiple light source more than 1/2 not functioning (4.4.1 (a) (ii)) | 3 |
| Offside Front Shock absorber has a serious fluid leak (5.3.2 (b)) | 3 |
| Offside Front Direction indicator not working (4.4.1 (a) (ii)) | 3 |
| Exhaust markings indicating not for road use or similar wording (6.1.2 (c)) | 3 |
| Stop lamp not working (4.3.1 (a) (ii)) | 3 |
| Front brake disc in such a condition that it is seriously weakened | 2 |
| Rear Footrest missing (6.2.12 (a)) | 2 |
| Headlamp insecure (4.1.1 (c)) | 2 |
| Front Headlamp aim projected beam image obviously incorrect (4.1.2 (c)) | 2 |
| Rear Brake lagging in operation (1.2.1 (d)) | 2 |
| Front Riders seat insecure (6.2.5 (a) (ii)) | 2 |
| Throttle control functioning such that safe operation of the motorcycle is adversely affected (6.2.7 (a) (ii)) | 2 |
| Offside Rear Footrest missing (6.2.12 (a)) | 2 |
| Brake excessively binding (1.2.1 (f)) | 2 |
| Rear Brake pedal insecure (1.1.2 (e) (i)) | 2 |
| Front Position lamp not working (4.2.1 (a)) | 2 |
| Steering operation fouling on the fuel tank or bodywork on full lock (2.1.4 (b)) | 2 |
| Rear Wheel bearing has excessive play (5.1.3 (a) (i)) | 2 |
| Front Headlamp not working on dipped beam (4.1.1 (a) (ii)) | 2 |
| Offside Front Footrest insecure (6.2.12 (a)) | 2 |
| Stop lamp does not illuminate by the operation of both brake controls (4.3.2 (a) (iii)) | 2 |
| Front Footrest insecure (6.2.12 (a)) | 2 |
| Rear Drive chain excessively tight, so that it is likely to fail (6.1.7 (k) (ii)) | 2 |
| Dipswitch does not operate immediately when selected on dipped beam (4.1.3 (b)) | 2 |
| Nearside Direction indicator not working (4.4.1 (a) (ii)) | 2 |
| Front Brake fluid contaminated (1.8 (a)) | 2 |
| Headlamp aim so that beam "kick up" is not visible on the screen (4.1.2 (a)) | 2 |
| Nearside Front Direction indicator not working (4.4.1 (a) (ii)) | 2 |
| Steering headbearing has excessive wear or free play (2.2.2 (f) (i)) | 2 |
| Brake performance unable to be tested (1.2.1 (g)) | 2 |
| Front Stop lamp does not illuminate by the operation of both brake controls (4.3.2 (a) (iii)) | 2 |
| Front Valve stem seriously damaged (5.2.3 (j)) | 2 |