| Most common failures | No# failures |
|---|
| Registration plate issues | 61 |
| Headlamp aim out of alignment | 51 |
| Rear reflector missing (4.8.2 (a) (ii)) | 47 |
| Rear reflector on motorcycle missing |1.4.1| | 34 |
| Headlamp not working on dipped beam (4.1.1 (a) (ii)) | 17 |
| Stop lamp remains on when the brakes are released | 14 |
| Offside Front Shock absorber has a serious fluid leak (5.3.2 (b)) | 13 |
| Nearside Front Shock absorber has a serious fluid leak (5.3.2 (b)) | 13 |
| Rear Wheel bearing has excessive play (5.1.3 (a) (i)) | 13 |
| Rear Stop lamp not working (4.3.1 (a) (ii)) | 11 |
| Nearside Front shock absorber seal failed and leaking oil |2.3.3| | 10 |
| Rear Rear reflector missing (4.8.2 (a) (ii)) | 10 |
| Horn not working (7.7 (a)) | 9 |
| Horn not working |1.7.3a| | 9 |
| Headlamp at least one does not illuminate on dipped beam |1.2.2a|i|| | 9 |
| Rear Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 8 |
| Headlamp not working on main beam (4.1.1 (a) (ii)) | 8 |
| Offside Front shock absorber seal failed and leaking oil |2.3.3| | 7 |
| Nearside Rear Direction indicator not working (4.4.1 (a) (ii)) | 6 |
| Front Stop lamp not working (4.3.1 (a) (ii)) | 6 |
| Rear wheel bearings have excessive free play |2.4.A.2c| | 5 |
| Front Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 5 |
| Nearside Front Shock absorber has a serious fluid leak |5.3.2 |b|| | 5 |
| Stop lamp not working (4.3.1 (a) (ii)) | 5 |
| Rear Wheel spoke excessively loose (5.2.2 (d)) | 5 |
| Front Brake indicates excessive fluctuation of brake effort (1.2.1 (e)) | 5 |
| Registration plate lamp issues | 4 |
| Horn not working (7.7 (a) (ii)) | 4 |
| Drive chain worn to excess |6.2.1e| | 4 |
| Drive chain worn to excess (6.1.7 (c) (i)) | 4 |
| Drive chain excessively loose (6.1.7 (c) (i)) | 4 |
| Rear reflector missing |4.8.2 |a| |ii|| | 4 |
| Rear Wheel bearing play so excessive it is likely to break up (5.1.3 (a) (ii)) | 4 |
| Steering headbearing excessively stiff or notchy (2.2.2 (f) (i)) | 4 |
| Drive chain excessively loose |6.2.1d| | 4 |
| Front Shock absorber has a serious fluid leak (5.3.2 (b)) | 4 |
| Front Position lamp not working (4.2.1 (a)) | 3 |
| Headlamp not working on dipped beam |4.1.1 |a| |ii|| | 3 |
| Exhaust noise is clearly in excess of that emitted by a similar motor bicycle fitted with a standard silencer in average condition |7.1.2| | 3 |
| Headlamp at least one does not illuminate on main beam |1.2.2a|ii|| | 3 |
| Horn not working |7.7 |a| |ii|| | 3 |
| Rear Shock absorber has negligible damping effect (5.3.2 (b)) | 3 |
| Nearside Handlebar grip insecure to handlebar (2.2.1 (d) (ii)) | 3 |
| Rear Position lamp not working (4.2.1 (a)) | 3 |
| Drive chain excessively loose |6.1.7 |c| |i|| | 3 |
| 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)) | 2 |
| All direction indicators not working (4.4.1 (a) (ii)) | 2 |
| Wheel alignment incorrect which adversely affects the handling |2.5.1| | 2 |
| Nearside Handlebar handgrip not secure to handlebars. |2.1.1c| | 2 |
| Nearside Front Shock absorber has a serious fluid leak fork seal (5.3.2 (b)) | 2 |
| Front Brake excessively binding (1.2.1 (f)) | 2 |
| Drive chain so loose it is likely to fail (6.1.7 (c) (ii)) | 2 |
| Front Steering headbearing excessively stiff or notchy (2.2.2 (f) (i)) | 2 |
| Drive chain sprocket worn to excess (6.1.7 (c) (i)) | 2 |
| Rear Brake indicates excessive fluctuation of brake effort (1.2.1 (e)) | 2 |
| Rear Stop lamp does not illuminate by the operation of both brake controls (4.3.2 (a) (iii)) | 2 |
| Front Headlamp not working on dipped beam (4.1.1 (a) (ii)) | 2 |
| Headlamp aim unable to be tested (4.1.2 (b)) | 2 |
| Front Wheel spoke excessively loose (5.2.2 (d)) | 2 |
| Rear Rear reflector on motorcycle missing |1.4.1| | 2 |
| Horn sound not in accordance with requirements (7.7 (c)) | 2 |
| Front Front shock absorber seal failed and leaking oil |2.3.3| | 2 |
| 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|| | 2 |
| Front Front wheel bearings have excessive free play |2.3.5b| | 2 |
| Front Wheel excessively distorted (5.2.2 (c) (i)) | 2 |
| Steering headbearing has excessive wear or free play (2.2.2 (f) (i)) | 2 |
| Rear Wheel spoke excessively loose |4.2.1b| | 2 |
| Front Wheel spoke excessively loose |4.2.1b| | 2 |
| Rear position lamp does not illuminate immediately when it is switched on |1.1.3a| | 2 |
| Horn missing |1.7.1| | 2 |
| Offside Rear Direction indicator not working (4.4.1 (a) (ii)) | 2 |
| Stop lamp not working |4.3.1 |a| |ii|| | 2 |
| Drive chain so loose it is likely to fail |6.1.7 |c| |ii|| | 2 |
| Drive chain so worn it is likely to fail (6.1.7 (c) (ii)) | 2 |
| Wheel alignment incorrect which adversely affects the steering |2.5.1| | 2 |
| Rear Drive chain sprocket worn to excess (6.1.7 (c) (i)) | 2 |
| Rear Wheel bearing play so excessive that directional control is impaired |5.1.3 |a| |ii|| | 2 |
| Rear Direction indicators flashing more than 120 times per minute |1.5.1c| | 2 |
| Front Stop lamp not working |4.3.1 |a| |ii|| | 2 |
| Drive chain horseshoe locking device incorrectly fitted (6.1.7 (j) (i)) | 2 |
| Rear Rear reflector missing |4.8.2 |a| |ii|| | 2 |
| Front Shock absorber has a serious fluid leak BOTH |5.3.2 |b|| | 2 |
| Stop lamp does not illuminate by the operation of both brake controls (4.3.2 (a) (iii)) | 2 |