| Most common failures | No# failures |
|---|
| Registration plate issues | 33 |
| Rear reflector on motorcycle missing |1.4.1| | 23 |
| Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 12 |
| Horn not working |1.7.3a| | 10 |
| Front Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 9 |
| Rear Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 8 |
| Headlamp aim out of alignment | 8 |
| Headlamp at least one does not illuminate on dipped beam |1.2.2a|i|| | 6 |
| Horn missing |1.7.1| | 6 |
| Front wheel bearings have excessive free play |2.3.5b| | 6 |
| Rear position lamp does not illuminate immediately when it is switched on |1.1.3a| | 6 |
| Rear wheel bearings have excessive free play |2.4.A.2c| | 5 |
| Rear reflector missing (4.8.2 (a) (ii)) | 4 |
| Headlamp at least one does not illuminate on main beam |1.2.2a|ii|| | 3 |
| Nearside Front shock absorber seal failed and leaking oil |2.3.3| | 3 |
| Rear Wheel spoke excessively loose |4.2.1b| | 3 |
| Drive chain excessively loose |6.2.1d| | 3 |
| Rear Rear reflector on motorcycle missing |1.4.1| | 2 |
| Rear Stop lamp not working (4.3.1 (a) (ii)) | 2 |
| Front Horn not working (7.7 (a)) | 2 |
| Front Horn missing |1.7.1| | 2 |
| Offside Front shock absorber seal failed and leaking oil |2.3.3| | 2 |
| Rear Rear position lamp does not illuminate immediately when it is switched on |1.1.3a| | 2 |
| Drive chain worn to excess |6.2.1e| | 2 |
| Horn not working |7.7 |a| |ii|| | 2 |
| Front Wheel bearing has excessive play (5.1.3 (a) (i)) | 2 |
| Rear Rear suspension bush has excessive free play |2.4.A2a|i|| | 2 |
| Rear Wheel bearing has excessive play |5.1.3 |a| |i|| | 2 |
| Rear Position lamp not working |4.2.1 |a|| | 2 |
| Horn not working (7.7 (a) (ii)) | 2 |
| Front Front wheel bearings have excessive free play |2.3.5b| | 2 |
| Centre Rear reflector on motorcycle missing |1.4.1| | 1 |
| Rear Rear position lamp adversely affected by the operation of another lamp |1.1.3b| | 1 |
| Front Horn not working |1.7.3a| | 1 |
| Horn replaced by a bell |1.7.3b| | 1 |
| Exhaust mounting does not fully support the exhaust system centre bolt replaced |7.1.1.c| | 1 |
| Rear Drive chain excessively loose |6.1.7 |c| |i|| | 1 |
| Front Headlamp aim headlamp damaged and function impaired |1.2.3a| | 1 |
| Rear reflector on sidecar missing |1.4.1| | 1 |
| Horn is not a constant note |1.7.3c| | 1 |
| Rear Drive chain sprocket worn to excess |6.2.1e| | 1 |
| Front Brake lining|s| contaminated |1.1.13 |b|| | 1 |
| Front Brake disc contaminated |1.1.14 |b|| | 1 |
| Riders seat insecure |6.2.1a| | 1 |
| Front Wheel spoke excessively loose |4.2.1b| | 1 |
| Direction indicator not working |1.5.1c| | 1 |
| Rear Wheel bearing play so excessive it is likely to break up (5.1.3 (a) (ii)) | 1 |
| Fuel system component leaking |7.2.1a| | 1 |
| Front Wheel bearing has excessive play |5.1.3 |a| |i|| | 1 |
| Rear brake disc in such a condition that it is seriously weakened | 1 |
| Rear reflector missing |4.8.2 |a| |ii|| | 1 |
| Rear Lower Suspension arm pin or bush excessively worn (5.3.4 (a) (i)) | 1 |
| Rear Wheel bearing has excessive play (5.1.3 (a) (i)) | 1 |
| Steering headbearing has excessive free play |2.2.2| | 1 |
| Rear wheel bearings are excessively tight |2.4.A.2c| | 1 |
| Front Brake disc|s| friction surface contaminated by oil or grease |3.2.A1k| | 1 |
| Decelerometer brake test The less effective brake control does not achieve an efficiency of 25% |1.2.2 |a| |i|| | 1 |
| Headlamp not working on dipped beam |4.1.1 |a| |ii|| | 1 |
| Headlamp not working on main beam |4.1.1 |a| |ii|| | 1 |
| Stop lamp not working |4.3.1 |a| |ii|| | 1 |
| Nearside Front Shock absorber has a serious fluid leak |5.3.2 |b|| | 1 |
| Steering control fouling between components which interferes with the free movement of the steering |2.1.2a| | 1 |
| Horn not working (7.7 (a)) | 1 |
| Nearside Handlebar restricted in free movement from lock to lock |2.1.4 |c|| | 1 |
| Suspension component pin or bush excessively worn rear linkage |5.3.4 |a| |i|| | 1 |
| Front Shock absorber has a serious fluid leak |5.3.2 |b|| | 1 |
| Rear Drive chain worn to excess |6.2.1e| | 1 |
| Front shock absorber seal failed and leaking oil both fronts |2.3.3| | 1 |
| Registration plate lamp issues | 1 |
| Wheel spoke missing (5.2.2 (d)) | 1 |
| Rear Rear reflector defective or damaged by more than 50% of the reflecting surface |4.8.1 |a| |ii|| | 1 |
| Offside Front Front shock absorber seal failed and leaking oil |2.3.3| | 1 |
| Rear Rear wheel bearings have excessive free play |2.4.A.2c| | 1 |
| Rear suspension bearing has excessive free play |2.4.A2a|i|| | 1 |
| Throttle operating incorrectly |6.2.1f| | 1 |
| Front Shock absorber has a serious fluid leak (5.3.2 (b)) | 1 |
| Stop lamp not working (4.3.1 (a) (ii)) | 1 |
| Rear Position lamp not working (4.2.1 (a)) | 1 |
| Nearside Front Brake cylinder insecurely mounted |3.2.B1a| | 1 |
| Wheel spoke missing |4.2.1b| | 1 |
| Stop lamp does not illuminate immediately a brake applies footbrake switch missing |1.3.1a| | 1 |
| Front Stop lamp not working (4.3.1 (a) (ii)) | 1 |
| Stop lamp emits other than a steady red light |1.3.1b| | 1 |
| Rear position lamp incorrect colour |1.1.2b| | 1 |
| Steering headbearing in such a condition that steering control is adversely affected |2.2.2 |f| |ii|| | 1 |
| Horn not working NO HORN FITTED |7.7 |a| |ii|| | 1 |
| Locking devices not correctly fitted which may make the motor bicycle dangerous to ride side stand loose |6.2.1h| | 1 |
| Dipswitch does not deflect the main beam/s, making them into dipped beam/s |1.2.2b|ii|| | 1 |
| Rear Stop lamp not working |4.3.1 |a| |ii|| | 1 |
| Rear Shock absorber insecurely attached |5.3.2 |a| |i|| | 1 |
| Steering movement excessively `notchy` with the wheel raised |2.2.1b| | 1 |
| Front Stop lamp missing |1.3.3a| | 1 |
| Rear Stop lamp missing |1.3.3a| | 1 |
| Exhaust is leaking and excessively noisey |7.1.1b| | 1 |
| Front Brake lever has inadequate reserve travel |3.1.3b| | 1 |
| Headlamp aim not tested |1.6| | 1 |
| Front Steering headbearing has excessive free play |2.2.2| | 1 |
| Headlamp switch faulty |1.2.4| | 1 |
| Brake hose damaged | 1 |
| Upper Rear suspension bush has excessive free play |2.4.A2a|i|| | 1 |
| Nearside Front Direction indicator missing |1.5.1a| | 1 |
| Nearside Rear Direction indicator missing |1.5.1a| | 1 |
| Offside Front Direction indicator missing |1.5.1a| | 1 |
| Offside Rear Direction indicator missing |1.5.1a| | 1 |
| Stop lamp affected by the operation of another lamp |1.3.2| | 1 |
| Rear Lower Rear suspension bush has excessive free play |2.4.A2a|i|| | 1 |
| Roller brake test The less effective brake control does not achieve an efficiency of 25%. |3.3.A2b| | 1 |