| Most common failures | No# failures |
|---|
| Headlamp aim out of alignment | 136 |
| Registration plate issues | 96 |
| Rear reflector on motorcycle missing |1.4.1| | 88 |
| Rear reflector missing (4.8.2 (a) (ii)) | 39 |
| Registration plate lamp issues | 29 |
| Horn not working |1.7.3a| | 24 |
| Rear reflector missing |4.8.2 |a| |ii|| | 23 |
| Front Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 15 |
| Horn not working (7.7 (a) (ii)) | 15 |
| Front Roller brake test indicates excessive fluctuation of brake effort |3.3.A1d| | 13 |
| Front Stop lamp not working (4.3.1 (a) (ii)) | 12 |
| Horn not working |7.7 |a| |ii|| | 11 |
| Rear Roller brake test indicates a binding brake |3.3.A1a| | 11 |
| Exhaust markings indicating not for road use or similar wording |7.1.4| | 11 |
| 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| | 10 |
| Rear Rear reflector on motorcycle missing |1.4.1| | 9 |
| Rear Rear reflector missing (4.8.2 (a) (ii)) | 9 |
| Drive chain excessively loose |6.2.1d| | 7 |
| Front Brake indicates excessive fluctuation of brake effort (1.2.1 (e)) | 7 |
| Front Roller brake test indicates a binding brake |3.3.A1a| | 6 |
| Drive chain excessively loose (6.1.7 (c) (i)) | 6 |
| Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 5 |
| Direction indicators not working |1.5.1c| | 5 |
| Stop lamp remains on when the brakes are released | 5 |
| Rear Footrest missing |6.2.1a| | 5 |
| Exhaust markings indicating not for road use or similar wording |6.1.2 |c|| | 5 |
| Nearside Rear Footrest missing |6.2.1a| | 5 |
| Offside Rear Footrest missing |6.2.1a| | 5 |
| Front Stop lamp not working |4.3.1 |a| |ii|| | 5 |
| Horn not working (7.7 (a)) | 4 |
| Rear Direction indicator obviously incorrectly positioned (4.4.3 (a)) | 4 |
| Stop lamp affected by the operation of another lamp |1.3.2| | 4 |
| Drive chain excessively loose |6.1.7 |c| |i|| | 4 |
| Front wheel bearings have excessive free play |2.3.5b| | 4 |
| Nearside Front shock absorber seal failed and leaking oil |2.3.3| | 4 |
| Headlamp aim beam image kick up to the offside |1.6| | 4 |
| Rear Footrest missing (6.2.12 (a)) | 4 |
| Rear Brake excessively binding (1.2.1 (f)) | 4 |
| Horn not loud enough to be heard by another road user |1.7.3a| | 3 |
| Nearside Front Shock absorber has a serious fluid leak |5.3.2 |b|| | 3 |
| Rear Drive chain excessively loose |6.2.1d| | 3 |
| Nearside Front Front shock absorber seal failed and leaking oil |2.3.3| | 3 |
| Steering headbearing has excessive free play |2.2.2| | 3 |
| Rear All direction indicators obviously incorrectly positioned |4.4.3 |a|| | 3 |
| Offside Rear Footrest missing (6.2.12 (a)) | 3 |
| Front Wheel bearing rough when rotated (5.1.3 (b) (i)) | 3 |
| Rear Brake excessively binding |1.2.1 |f|| | 3 |
| Nearside Handlebar handgrip not secure to handlebars. |2.1.1c| | 3 |
| Front Stop lamp remains on when the brake is released |1.3.1e| | 3 |
| Headlamp aim so that beam "kick up" is not visible on the screen |4.1.2 |a|| | 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)) | 3 |
| Rear Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 3 |
| Offside Front Direction indicator not working (4.4.1 (a) (ii)) | 3 |