| Most common failures | No# failures |
|---|
| Headlamp aim out of alignment | 163 |
| Rear reflector on motorcycle missing |1.4.1| | 127 |
| Registration plate issues | 110 |
| Horn not working |1.7.3a| | 34 |
| Rear reflector missing (4.8.2 (a) (ii)) | 25 |
| Rear Rear reflector on motorcycle missing |1.4.1| | 20 |
| Front Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 18 |
| Rear Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 14 |
| Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 14 |
| Exhaust markings indicating not for road use or similar wording |7.1.4| | 13 |
| Registration plate lamp issues | 13 |
| Rear reflector missing |4.8.2 |a| |ii|| | 9 |
| Drive chain excessively loose |6.2.1d| | 9 |
| 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| | 8 |
| Rear Roller brake test indicates a binding brake |3.3.A1a| | 8 |
| Rear suspension movement is excessively stiff |2.4.A.3b| | 8 |
| Rear position lamp does not illuminate immediately when it is switched on |1.1.3a| | 8 |
| Nearside Front shock absorber seal failed and leaking oil |2.3.3| | 8 |
| Front position lamp does not illuminate immediately when switched on |1.1.3a| | 7 |
| Rear Brake excessively binding (1.2.1 (f)) | 7 |
| Headlamp at least one does not illuminate on dipped beam |1.2.2a|i|| | 7 |
| Nearside Front Direction indicator not working |1.5.1c| | 6 |
| Horn not loud enough to be heard by another road user |1.7.3a| | 6 |
| Steering movement excessively `notchy` with the wheel raised |2.2.1b| | 6 |
| Offside Front Shock absorber has a serious fluid leak (5.3.2 (b)) | 6 |
| Nearside Handlebar handgrip not secure to handlebars. |2.1.1c| | 6 |
| Front Roller brake test indicates a binding brake |3.3.A1a| | 6 |
| Headlamp aim beam image kick up to the offside |1.6| | 6 |
| Offside Rear Direction indicator not working (4.4.1 (a) (ii)) | 5 |
| Headlamp at least one does not illuminate on main beam |1.2.2a|ii|| | 5 |
| Rear Brake disc|s| excessively worn |3.2.A1l| | 5 |
| Nearside Rear Footrest missing |6.2.1a| | 4 |
| Offside Rear Footrest missing |6.2.1a| | 4 |
| Nearside Rear Direction indicator not working |1.5.1c| | 4 |
| Rear Rear reflector missing (4.8.2 (a) (ii)) | 4 |
| Drive chain worn to excess |6.2.1e| | 4 |
| Horn not working (7.7 (a) (ii)) | 4 |
| Rear Stop lamp remains on when the brake is released |1.3.1e| | 4 |
| Rear Stop lamp not working |4.3.1 |a| |ii|| | 4 |
| Rear Stop lamp not working (4.3.1 (a) (ii)) | 4 |
| Offside Front shock absorber seal failed and leaking oil |2.3.3| | 4 |
| Steering headbearing has excessive free play |2.2.2| | 4 |
| Direction indicators not working |1.5.1c| | 4 |
| Front Roller brake test indicates excessive fluctuation of brake effort |3.3.A1d| | 4 |
| Front Horn not working (7.7 (a) (ii)) | 3 |
| Stop lamp not working (4.3.1 (a) (ii)) | 3 |
| Direction indicators flashing more than 120 times per minute |1.5.1c| | 3 |
| Stop lamp does not emit a steady light |1.3.1b| | 3 |
| Roller brake test The less effective brake control does not achieve an efficiency of 25% |1.2.2 |a| |i|| | 3 |
| Headlamp insecure |1.2.3b| | 3 |
| Nearside Front Direction indicator not working (4.4.1 (a) (ii)) | 3 |
| Front wheel bearings are excessively rough |2.3.5b| | 3 |
| Exhaust markings indicating not for road use or similar wording (7.1.4) | 3 |
| Nearside Front Direction indicators not working |1.5.1c| | 3 |
| Rear Position lamp not working (4.2.1 (a)) | 3 |
| Drive chain excessively loose (6.1.7 (c) (i)) | 3 |
| Horn not working |7.7 |a| |ii|| | 3 |
| Rear Footrest missing |6.2.1a| | 3 |
| Rear Floor brake test indicates a binding brake |3.3.C2c| | 3 |