| Most common failures | No# failures |
|---|
| Front Roller brake test indicates a binding brake |3.3.A1a| | 43 |
| Headlamp aim out of alignment | 32 |
| Front Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 28 |
| Rear Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 20 |
| Drive chain excessively loose |6.2.1d| | 15 |
| Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 11 |
| Steering movement excessively `notchy` with the weight on the lower bearing |2.2.1a| | 11 |
| Steering movement excessively `notchy` with the wheel raised |2.2.1b| | 11 |
| Front Floor brake test indicates a binding brake |3.3.C2c| | 10 |
| Rear Wheel spoke excessively loose |4.2.1b| | 10 |
| Steering headbearing has excessive free play |2.2.2| | 10 |
| Throttle operating incorrectly |6.2.1f| | 9 |
| Front wheel bearings have excessive free play |2.3.5b| | 8 |
| Headlamp at least one does not illuminate on dipped beam |1.2.2a|i|| | 7 |
| Front Roller brake test indicates excessive fluctuation of brake effort |3.3.A1d| | 7 |
| Rear position lamp does not illuminate immediately when it is switched on |1.1.3a| | 7 |
| Front Stop lamp not working (4.3.1 (a) (ii)) | 6 |
| Rear Wheel corroded significantly reducing the original strength |4.2.1a| | 5 |
| Rear Roller brake test indicates a binding brake |3.3.A1a| | 5 |
| Rear Roller brake test indicates excessive fluctuation of brake effort |3.3.A1d| | 5 |
| Drive chain worn to excess |6.2.1e| | 5 |
| Registration plate issues | 5 |
| Rear Wheel bearing has excessive play (5.1.3 (a) (i)) | 5 |
| Front Brake excessively binding (1.2.1 (f)) | 5 |
| Rear Brake disc|s| cracked |3.2.A1g| | 4 |
| Front Wheel spoke excessively loose |4.2.1b| | 4 |
| Rear Drive chain sprocket worn to excess |6.2.1e| | 4 |
| Nearside Handlebar handgrip not secure to handlebars. |2.1.1c| | 4 |
| Rear Position lamp not working (4.2.1 (a)) | 4 |
| Rear Stop lamp not working (4.3.1 (a) (ii)) | 4 |
| Exhaust is leaking and excessively noisey |7.1.1b| | 3 |
| Front Roller brake test indicates a sticking brake |3.3.A1a| | 3 |
| Rear Roller brake test indicates a severely juddering brake |3.3.A1b| | 3 |
| Front position lamp incorrect colour |1.1.2a| | 3 |
| Front Headlamp at least one does not illuminate on dipped beam |1.2.2a|i|| | 3 |
| Drive chain excessively tight |6.2.1d| | 3 |
| Rear Drive chain excessively loose |6.2.1d| | 3 |
| Rear wheel bearings have excessive free play |2.4.A.2c| | 3 |
| Front Front position lamp does not illuminate immediately when switched on |1.1.3a| | 3 |
| Rear Stop lamp remains on when the brake is released |1.3.1e| | 2 |
| Brake lever has inadequate reserve travel |3.1.3b| | 2 |
| Dipswitch does not extinquish main beam/s, leaving at least 1 dipped beam headlamp |1.2.2b|i|| | 2 |
| Horn not loud enough to be heard by another road user |1.7.3a| | 2 |
| Front position lamp does not illuminate immediately when switched on |1.1.3a| | 2 |
| Front Stop lamp not working |4.3.1 |a| |ii|| | 2 |
| Steering control fouling between components which interferes with the free movement of the steering |2.1.2a| | 2 |
| Wheel alignment incorrect which adversely affects the handling |2.5.1| | 2 |
| Throttle has a significant change in engine speed whilst moving the steering from lock to lock |2.1.4| | 2 |
| Rear Brake fluid reservoir fluid level dangerously low |3.2.B1d| | 2 |
| Stop lamp remains on when the brake is released |1.3.1e| | 2 |
| Front Stop lamp remains on when the brake is released |1.3.1e| | 2 |
| Handlebar deformed |2.1.1b| | 2 |
| Nearside Rear Direction indicator not working |1.5.1c| | 2 |
| Nearside Rear Direction indicator insecure |1.5.3b| | 2 |
| Offside Rear Direction indicator damaged and function impaired |1.5.3a| | 2 |
| Rear Exhaust is leaking and excessively noisey |7.1.1b| | 2 |
| Offside Handlebar handgrip not secure to handlebars. |2.1.1c| | 2 |
| Headlamp switch faulty |1.2.4| | 2 |
| Rear reflector on motorcycle missing |1.4.1| | 2 |
| Rear Drive chain worn to excess |6.2.1e| | 2 |
| Nearside Front Brake disc|s| excessively worn |3.2.A1l| | 2 |
| Nearside Rear Drive chain excessively loose |6.2.1d| | 2 |
| Front position lamp missing |1.1.1a| | 2 |
| Offside Front Front suspension assembly component cracked |2.3.1| | 2 |
| Steering headbearing excessively stiff or notchy (2.2.2 (f) (i)) | 2 |
| Fuel system component leaking (6.1.3 (b) (i)) | 2 |
| Rear Brake excessively binding (1.2.1 (f)) | 2 |
| Rear Brake disc significantly and obviously worn (1.1.14 (a) (i)) | 2 |
| Exhaust has a major leak of exhaust gases (6.1.2 (a)) | 2 |
| Stop lamp remains on when the brakes are released | 2 |