| Most common failures | No# failures |
|---|
| Registration plate issues | 102 |
| Rear reflector on motorcycle missing |1.4.1| | 72 |
| Headlamp aim out of alignment | 37 |
| Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 30 |
| Headlamp at least one does not illuminate on dipped beam |1.2.2a|i|| | 24 |
| Horn not working |1.7.3a| | 23 |
| Rear reflector missing (4.8.2 (a) (ii)) | 20 |
| Horn missing |1.7.1| | 18 |
| Headlamp at least one does not illuminate on main beam |1.2.2a|ii|| | 17 |
| Front Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 14 |
| Horn not working |7.7 |a| |ii|| | 13 |
| Rear Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 11 |
| Headlamp not working on dipped beam (4.1.1 (a) (ii)) | 10 |
| Nearside Front shock absorber seal failed and leaking oil |2.3.3| | 10 |
| Registration plate lamp issues | 10 |
| Horn not working (7.7 (a)) | 8 |
| Rear Rear reflector on motorcycle missing |1.4.1| | 8 |
| Nearside Front Shock absorber has a serious fluid leak (5.3.2 (b)) | 7 |
| Rear position lamp does not illuminate immediately when it is switched on |1.1.3a| | 7 |
| Front wheel bearings have excessive free play |2.3.5b| | 7 |
| Headlamp not working on main beam (4.1.1 (a) (ii)) | 6 |
| Offside Front shock absorber seal failed and leaking oil |2.3.3| | 6 |
| Horn not working (7.7 (a) (ii)) | 6 |
| Rear reflector missing |4.8.2 |a| |ii|| | 6 |
| Rear Position lamp not working (4.2.1 (a)) | 6 |
| Stop lamp not working (4.3.1 (a) (ii)) | 5 |
| Rear Stop lamp not working |4.3.1 |a| |ii|| | 4 |
| Offside Front Shock absorber has a serious fluid leak (5.3.2 (b)) | 4 |
| Front Stop lamp not working (4.3.1 (a) (ii)) | 4 |
| Rear Wheel spoke excessively loose |4.2.1b| | 4 |
| Stop lamp not working |4.3.1 |a| |ii|| | 4 |
| Rear wheel bearings have excessive free play |2.4.A.2c| | 4 |
| Rear Wheel bearing has excessive play (5.1.3 (a) (i)) | 4 |
| Rear Position lamp not working |4.2.1 |a|| | 3 |
| Steering movement excessively `notchy` with the wheel raised |2.2.1b| | 3 |
| Headlamp aim not tested |1.6| | 3 |
| Stop lamp does not illuminate by the operation of both brake controls (4.3.2 (a) (iii)) | 3 |
| Headlamp aim unable to be tested (4.1.2 (b)) | 3 |
| Front Stop lamp missing |1.3.3a| | 3 |
| Headlamp not working on dipped beam |4.1.1 |a| |ii|| | 3 |
| Front Drive chain sprocket worn to excess |6.2.1e| | 3 |
| All direction indicators missing (4.4.1 (a) (ii)) | 3 |
| Front Stop lamp not working |4.3.1 |a| |ii|| | 3 |
| Drive chain worn to excess |6.2.1e| | 3 |
| Front Shock absorber has a serious fluid leak (5.3.2 (b)) | 3 |
| Front Horn not working |1.7.3a| | 2 |
| Front Wheel bearing rough when rotated (5.1.3 (b) (i)) | 2 |
| Front Wheel bearing has excessive play (5.1.3 (a) (i)) | 2 |
| Rear Stop lamp missing |1.3.3a| | 2 |
| Steering movement excessively rough with the weight on the lower bearing |2.2.1a| | 2 |
| Front position lamp does not illuminate immediately when switched on |1.1.3a| | 2 |
| Front wheel bearings are excessively rough |2.3.5b| | 2 |
| Locking device|s| not correctly fitted which may make the motor bicycle dangerous to ride |6.2.1h| | 2 |
| Rear Brake disc|s| is excessively distorted |3.2.A1m| | 2 |
| Headlamp not working on main beam |4.1.1 |a| |ii|| | 2 |
| Rear Rear wheel bearings have excessive free play |2.4.A.2c| | 2 |
| Horn not loud enough to be heard by another road user |1.7.3a| | 2 |
| 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| | 2 |
| Throttle operating incorrectly |6.2.1f| | 2 |
| Direction indicators not working |1.5.1c| | 2 |
| Front shock absorber seal failed and leaking oil |2.3.3| | 2 |
| Headlamp aim projected beam image obviously incorrect (4.1.2 (c)) | 2 |
| Drive chain excessively loose (6.1.7 (c) (i)) | 2 |
| Drive chain excessively tight |6.2.1d| | 2 |
| Offside Front Shock absorber has a serious fluid leak |5.3.2 |b|| | 2 |
| Rear Rear position lamp does not illuminate immediately when it is switched on |1.1.3a| | 2 |
| Rear Rear reflector missing (4.8.2 (a) (ii)) | 2 |
| Rear Stop lamp not working (4.3.1 (a) (ii)) | 2 |
| Direction indicator missing |1.5.1a| | 2 |
| Front suspension has excessive stiffness in the suspension movement. |2.3.6b| | 2 |