| Most common failures | No# failures |
|---|
| Headlamp aim out of alignment | 156 |
| Rear reflector on motorcycle missing |1.4.1| | 62 |
| Registration plate issues | 41 |
| Front Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 34 |
| Rear Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 16 |
| Headlamp at least one does not illuminate on dipped beam |1.2.2a|i|| | 14 |
| Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 12 |
| Horn not working |1.7.3a| | 10 |
| Front position lamp does not illuminate immediately when switched on |1.1.3a| | 9 |
| Nearside Handlebar handgrip not secure to handlebars. |2.1.1c| | 8 |
| Rear Rear reflector on motorcycle missing |1.4.1| | 8 |
| Rear position lamp does not illuminate immediately when it is switched on |1.1.3a| | 8 |
| 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| | 7 |
| Rear reflector missing |4.8.2 |a| |ii|| | 7 |
| Stop lamp remains on when the brakes are released | 7 |
| Drive chain excessively loose |6.2.1d| | 7 |
| Rear reflector missing (4.8.2 (a) (ii)) | 7 |
| Front Stop lamp not working |4.3.1 |a| |ii|| | 6 |
| Headlamp aim beam image kick up to the offside |1.6| | 6 |
| Nearside Front shock absorber seal failed and leaking oil |2.3.3| | 5 |
| Exhaust is leaking and excessively noisey |7.1.1b| | 5 |
| Front position lamp incorrect colour |1.1.2a| | 5 |
| Front Floor brake test indicates a binding brake |3.3.C2c| | 5 |
| Front Stop lamp not working (4.3.1 (a) (ii)) | 5 |
| Drive chain worn to excess |6.2.1e| | 4 |
| Front Roller brake test indicates a binding brake |3.3.A1a| | 4 |
| Nearside Front Direction indicators not working |1.5.1c| | 4 |
| Direction indicators flashing more than 120 times per minute |1.5.1c| | 4 |
| Rear Rear reflector missing (4.8.2 (a) (ii)) | 4 |
| Offside Front Footrest insecure |6.2.1a| | 3 |
| Headlamp incorrect colour |1.2.1| | 3 |
| Rear position lamp adversely affected by the operation of another lamp |1.1.3b| | 3 |
| Rear Rear reflector missing |4.8.2 |a| |ii|| | 3 |
| Headlamp at least one does not illuminate on main beam |1.2.2a|ii|| | 3 |
| Nearside Rear Direction indicator not working |1.5.1c| | 3 |
| Horn not loud enough to be heard by another road user |1.7.3a| | 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 |
| Horn not working (7.7 (a) (ii)) | 3 |
| Headlamp not working on main beam (4.1.1 (a) (ii)) | 3 |
| Rear Brake disc|s| excessively scored |3.2.A1l| | 2 |
| Front Steering headbearing has excessive free play |2.2.2| | 2 |
| Nearside Footrest insecure |6.2.1a| | 2 |
| Headlamp aim headlamp damaged and function impaired |1.2.3a| | 2 |
| Front Headlamp at least one does not illuminate on dipped beam |1.2.2a|i|| | 2 |
| Steering movement excessively `notchy` with the wheel raised |2.2.1b| | 2 |
| Nearside Handlebar grip insecure to handlebar |2.2.1 |d| |ii|| | 2 |
| Front Valve stem seriously damaged |5.2.3 |j|| | 2 |
| Drive chain so loose it is likely to fail |6.1.7 |c| |ii|| | 2 |
| Offside Front shock absorber seal failed and leaking oil |2.3.3| | 2 |
| Handlebar deformed |2.1.1b| | 2 |
| Nearside Front Upper Handlebar handgrip not secure to handlebars. |2.1.1c| | 2 |
| Front Brake excessively binding |1.2.1 |f|| | 2 |
| Drive chain excessively tight |6.2.1d| | 2 |
| Steering movement excessively `notchy` with the weight on the lower bearing |2.2.1a| | 2 |
| Rear Roller brake test indicates a binding brake |3.3.A1a| | 2 |
| Front shock absorber seal failed and leaking oil |2.3.3| | 2 |
| Nearside Front Direction indicator not working |1.5.1c| | 2 |
| Nearside Front Footrest insecure |6.2.1a| | 2 |
| An item not tested |Manual| | 2 |
| Drive chain excessively loose |6.1.7 |c| |i|| | 2 |
| Nearside Front Front shock absorber seal failed and leaking oil |2.3.3| | 2 |
| Offside Front Direction indicator not working |1.5.1c| | 2 |
| Offside Front Direction indicator deteriorated and function impaired |1.5.3a| | 2 |
| Rear Brake disc|s| excessively worn |3.2.A1l| | 2 |
| Rear Drive chain excessively loose |6.2.1d| | 2 |
| Front Brake lever has inadequate reserve travel |3.1.3b| | 2 |
| Nearside Front Footrest insecure |6.2.12 |a|| | 2 |
| Rear Drive chain sprocket worn to excess |6.2.1e| | 2 |
| Nearside Rear Drive chain excessively loose |6.2.1d| | 2 |
| Steering control fouling between components which interferes with the free movement of the steering |2.1.2a| | 2 |
| Rear Wheel bearing has excessive play (5.1.3 (a) (i)) | 2 |
| Nearside Front Shock absorber has a serious fluid leak (5.3.2 (b)) | 2 |
| Headlamp aim so that beam "kick up" is not visible on the screen (4.1.2 (a)) | 2 |
| Central Front Position lamp not working (4.2.1 (a)) | 2 |
| Front Stop lamp does not illuminate by the operation of both brake controls (4.3.2 (a) (iii)) | 2 |
| Nearside Handlebar grip insecure to handlebar (2.2.1 (d) (ii)) | 2 |
| Stop lamp does not illuminate by the operation of both brake controls (4.3.2 (a) (iii)) | 2 |