| Most common failures | No# failures |
|---|
| Registration plate issues | 756 |
| Rear reflector on motorcycle missing |1.4.1| | 734 |
| Headlamp aim out of alignment | 419 |
| Registration plate lamp issues | 78 |
| Rear Rear reflector on motorcycle missing |1.4.1| | 69 |
| Rear reflector missing (4.8.2 (a) (ii)) | 69 |
| Drive chain excessively loose |6.2.1d| | 59 |
| Front Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 56 |
| Rear Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 54 |
| 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| | 52 |
| Rear reflector missing |4.8.2 |a| |ii|| | 47 |
| Nearside Front shock absorber seal failed and leaking oil |2.3.3| | 45 |
| Steering headbearing has excessive free play |2.2.2| | 44 |
| Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 39 |
| Rear position lamp adversely affected by the operation of another lamp |1.1.3b| | 39 |
| Direction indicators flashing more than 120 times per minute |1.5.1c| | 37 |
| Offside Front shock absorber seal failed and leaking oil |2.3.3| | 33 |
| Horn not working |1.7.3a| | 33 |
| Headlamp at least one does not illuminate on dipped beam |1.2.2a|i|| | 26 |
| Stop lamp affected by the operation of another lamp |1.3.2| | 23 |
| Front position lamp does not illuminate immediately when switched on |1.1.3a| | 23 |
| Nearside Rear Direction indicators not working |1.5.1c| | 20 |
| Rear Rear reflector missing (4.8.2 (a) (ii)) | 20 |
| Nearside Front Direction indicators not working |1.5.1c| | 19 |
| Offside Front Front shock absorber seal failed and leaking oil |2.3.3| | 19 |
| Rear reflector on motorcycle incorrectly positioned |1.4.2d| | 17 |
| Rear Direction indicator affected by the operation of another lamp |1.5.1c| | 17 |
| Headlamp at least one does not illuminate on main beam |1.2.2a|ii|| | 15 |
| Drive chain excessively tight |6.2.1d| | 15 |
| Headlamp not working on dipped beam (4.1.1 (a) (ii)) | 15 |
| Headlamp aim beam image kick up to the offside |1.6| | 14 |
| Riders seat insecure |6.2.1a| | 14 |
| Front position lamp incorrect colour |1.1.2a| | 14 |
| Offside Rear Direction indicators not working |1.5.1c| | 14 |
| Front Stop lamp not working (4.3.1 (a) (ii)) | 14 |
| Nearside Rear Direction indicator not working |1.5.1c| | 13 |
| Headlamp not working on main beam (4.1.1 (a) (ii)) | 13 |
| Nearside Rear Footrest missing |6.2.1a| | 12 |
| Rear suspension bearing has excessive free play |2.4.A2a|i|| | 12 |
| 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)) | 12 |
| Offside Rear Footrest missing |6.2.1a| | 11 |
| Nearside Front Direction indicator not working |1.5.1c| | 11 |
| Drive chain worn to excess |6.2.1e| | 11 |
| Roller brake test The less effective brake control does not achieve an efficiency of 25%. |3.3.A2b| | 11 |
| Rear Footrest missing |6.2.1a| | 11 |
| Direction indicators not working |1.5.1c| | 11 |
| Centre Rear Rear reflector on motorcycle missing |1.4.1| | 11 |
| Rear suspension bush has excessive free play |2.4.A2a|i|| | 10 |
| Front shock absorber seal failed and leaking oil |2.3.3| | 10 |
| Rear position lamp does not illuminate immediately when it is switched on |1.1.3a| | 10 |
| Nearside Front Shock absorber has a serious fluid leak |5.3.2 |b|| | 10 |
| Nearside Front Front shock absorber seal failed and leaking oil |2.3.3| | 10 |
| Stop lamp not working (4.3.1 (a) (ii)) | 10 |
| Drive chain excessively loose (6.1.7 (c) (i)) | 10 |
| All direction indicators not working (4.4.1 (a) (ii)) | 10 |
| Nearside Front Shock absorber has a serious fluid leak (5.3.2 (b)) | 10 |
| Centre Rear reflector on motorcycle missing |1.4.1| | 9 |
| Stop lamp remains on when the brakes are released | 9 |
| Offside Front Shock absorber has a serious fluid leak (5.3.2 (b)) | 9 |
| Horn not working (7.7 (a) (ii)) | 9 |