| Most common failures | No# failures |
|---|
| Headlamp aim out of alignment | 160 |
| Rear reflector on motorcycle missing |1.4.1| | 74 |
| Front Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 67 |
| Registration plate issues | 39 |
| Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 29 |
| Rear Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 18 |
| Front Stop lamp not working (4.3.1 (a) (ii)) | 17 |
| Drive chain excessively loose |6.2.1d| | 12 |
| Horn not working |1.7.3a| | 12 |
| Rear position lamp does not illuminate immediately when it is switched on |1.1.3a| | 11 |
| Front position lamp does not illuminate immediately when switched on |1.1.3a| | 11 |
| Headlamp at least one does not illuminate on dipped beam |1.2.2a|i|| | 10 |
| Front Stop lamp not working |4.3.1 |a| |ii|| | 9 |
| Rear reflector missing |4.8.2 |a| |ii|| | 8 |
| Rear Rear reflector on motorcycle missing |1.4.1| | 8 |
| Front Valve stem seriously damaged (5.2.3 (j)) | 8 |
| Nearside Handlebar handgrip not secure to handlebars. |2.1.1c| | 6 |
| Exhaust is leaking and excessively noisey |7.1.1b| | 6 |
| Headlamp not working on dipped beam (4.1.1 (a) (ii)) | 6 |
| Wheel alignment incorrect which adversely affects the handling |2.5.1| | 5 |
| Rear Roller brake test indicates excessive fluctuation of brake effort |3.3.A1d| | 5 |
| Rear Valve stem seriously damaged (5.2.3 (j)) | 5 |
| Drive chain worn to excess |6.2.1e| | 4 |
| Front Floor brake test indicates a binding brake |3.3.C2c| | 4 |
| Offside Front shock absorber seal failed and leaking oil |2.3.3| | 4 |
| Rear Drive chain sprocket worn to excess |6.2.1e| | 4 |
| 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| | 4 |
| Rear suspension bearing has excessive free play |2.4.A2a|i|| | 4 |
| Nearside Front shock absorber seal failed and leaking oil |2.3.3| | 4 |
| Stop lamp not working |4.3.1 |a| |ii|| | 4 |
| Front Position lamp not working (4.2.1 (a)) | 4 |
| Rear reflector missing (4.8.2 (a) (ii)) | 4 |
| Offside Front Shock absorber has a serious fluid leak (5.3.2 (b)) | 4 |
| Offside Rear Direction indicators not working |1.5.1c| | 3 |
| Steering headbearing has excessive free play |2.2.2| | 3 |
| Headlamp aim beam image kick up to the offside |1.6| | 3 |
| Nearside Rear Direction indicator not working |1.5.1c| | 3 |
| Headlamp not working on dipped beam |4.1.1 |a| |ii|| | 3 |
| Nearside Front Direction indicator not working |1.5.1c| | 3 |
| Brake lever has inadequate reserve travel |3.1.3b| | 3 |
| Horn not working |7.7 |a| |ii|| | 3 |
| Nearside Front Footrest insecure |6.2.1a| | 3 |
| Drive chain excessively tight |6.2.1d| | 3 |
| Front Roller brake test indicates a binding brake |3.3.A1a| | 3 |
| Exhaust has a major leak of exhaust gases (6.1.2 (a)) | 3 |
| Drive chain excessively tight (6.1.7 (k) (i)) | 3 |
| Rear Rear reflector missing (4.8.2 (a) (ii)) | 3 |
| Drive chain so loose it is likely to fail (6.1.7 (c) (ii)) | 3 |
| Nearside Front Shock absorber has a serious fluid leak (5.3.2 (b)) | 3 |