| Most common failures | No# failures |
|---|
| Headlamp aim out of alignment | 21 |
| Rear Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 10 |
| Rear position lamp does not illuminate immediately when it is switched on |1.1.3a| | 9 |
| Roller brake test The less effective brake control does not achieve an efficiency of 25%. |3.3.A2b| | 9 |
| Brake pedal has inadequate reserve travel |3.1.3b| | 8 |
| Headlamp at least one does not illuminate on dipped beam |1.2.2a|i|| | 8 |
| Headlamp at least one does not illuminate on main beam |1.2.2a|ii|| | 8 |
| Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 7 |
| Rear Brake pedal has inadequate reserve travel |3.1.3b| | 6 |
| Front Brake lever has inadequate reserve travel |3.1.3b| | 6 |
| Steering headbearing has excessive free play |2.2.2| | 4 |
| Horn not working |1.7.3a| | 4 |
| Front Steering headbearing has excessive free play |2.2.2| | 3 |
| Brake lever has inadequate reserve travel |3.1.3b| | 2 |
| Front position lamp does not illuminate immediately when switched on |1.1.3a| | 2 |
| Stop lamp remains on when the brake is released |1.3.1e| | 2 |
| Rear Rear shock absorber has inadequate damping effect. |2.4.A.3b| | 2 |
| Rear Roller brake test indicates excessive fluctuation of brake effort |3.3.A1d| | 2 |
| Rear Position lamp not working (4.2.1 (a)) | 2 |
| Front Front suspension assembly excessive wear or free play in a front suspension component |2.3.4| | 1 |
| Nearside Rear Footrest insecure |6.2.1a| | 1 |
| Front Roller brake test indicates a severely grabbing brake |3.3.A1b| | 1 |
| Throttle operating incorrectly |6.2.1f| | 1 |
| Front suspension assembly component loose |2.3.1| | 1 |
| Rear Rear position lamp does not illuminate immediately when it is switched on |1.1.3a| | 1 |
| Front Steering movement excessively `notchy` with the weight on the lower bearing |2.2.1a| | 1 |
| Rear Brake pedal insecure |3.1.2a| | 1 |
| Front Brake caliper|s| securing bolt|s| missing |3.2.A1j| | 1 |
| Front Roller brake test indicates a binding brake |3.3.A1a| | 1 |
| Headlamp at least one does not illuminate on dipped beam hi beam |1.2.2a|i|| | 1 |
| Rear position lamp does not illuminate immediately when it is switched on tail light |1.1.3a| | 1 |
| Rear Roller brake test indicates brake effort rise disproportional to brake lever or pedal effort |3.3.A1c| | 1 |
| Front Brake reaction bracket securing bolt|s| loose |3.2.A1j| | 1 |
| Front wheel has a loose wheel nut|s| |4.2.3a| | 1 |
| Brake performance not tested |3.3| | 1 |
| Stop lamp affected by the operation of another lamp |1.3.2| | 1 |
| Exhaust mounting does not fully support the exhaust system |7.1.1.c| | 1 |
| Headlamp insecure |1.2.3b| | 1 |
| Centre Rear Rear reflector on motorcycle missing |1.4.1| | 1 |
| Front Front position lamp does not illuminate immediately when switched on |1.1.3a| | 1 |
| Front Front position lamp insecure |1.1.1c| | 1 |
| Front Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 1 |
| Throttle has a significant change in engine speed whilst moving the steering from lock to lock |2.1.4| | 1 |
| Front Headlamp at least one does not illuminate on dipped beam |1.2.2a|i|| | 1 |
| Front Headlamp at least one does not illuminate on main beam |1.2.2a|ii|| | 1 |
| Front Headlamp dipped beam affected by the operation of the horn |1.2.2c| | 1 |
| Front Headlamp main beam affected by the operation of the horn |1.2.2c| | 1 |
| Sidecar rear position lamp does not illuminate immediately when it is switched on |1.1.3a| | 1 |
| Exhaust mounting does not fully support the exhaust system rear bolt |7.1.1.c| | 1 |
| Handlebar mounting clamp bolt loose |2.1.1a| | 1 |
| Nearside Steering lock stop ineffective |2.1.3| | 1 |
| Rear Brake locking device missing |3.2.A1e| | 1 |
| Steering control handlebar movement restricted by trapped cables |2.1.2c| | 1 |
| Roller brake test No brake control achieves an efficiency of 30%. |3.3.A2a| | 1 |
| Horn not loud enough to be heard by another road user |1.7.3a| | 1 |
| Fuel system component leaking |7.2.1a| | 1 |
| Front Headlamp switch faulty |1.2.4| | 1 |
| Rear suspension component seized |2.4A2a|ii|| | 1 |
| Rear Rear suspension movement is excessively stiff |2.4.A.3b| | 1 |
| Rear wheel has a missing wheel stud|s| |4.2.3a| | 1 |
| Riders seat insecure |6.2.1a| | 1 |
| All position lamps do not illuminate immediately when switched on |1.1.3a| | 1 |
| Steering movement excessively `notchy` with the weight on the lower bearing |2.2.1a| | 1 |
| Fuel pipe leaking |7.2.1a| | 1 |
| Rear Rear suspension bush excessively deteriorated |2.4.A2a|i|| | 1 |
| Brake lever pivots excessively worn |3.1.3a| | 1 |
| Centre Rear Roller brake test indicates a binding brake |3.3.A1a| | 1 |
| Offside Front Brake lever has inadequate reserve travel |3.1.3b| | 1 |
| Centre Front Steering headbearing has excessive free play |2.2.2| | 1 |
| Front Roller brake test indicates brake effort rise disproportional to brake lever or pedal effort |3.3.A1c| | 1 |
| Front Brake caliper|s| insecure |3.2.A1j| | 1 |
| Rear position lamp damaged and function impaired |1.1.1b| | 1 |
| Central Front Lower Brake component has restricted free movement and operation is likely to be impeded |3.2.A1h| | 1 |
| Headlamp dipped beam affected by the operation of the horn |1.2.2c| | 1 |
| Rear position lamp adversely affected by the operation of the horn |1.1.3b| | 1 |
| Stop lamp affected by the operation of the horn |1.3.2| | 1 |
| Rear Brake lever has inadequate reserve travel |3.1.3b| | 1 |
| Riders seat missing |6.2.1a| | 1 |
| Rear Brake component cracked and seriously reduced in strength |3.2.A1| | 1 |
| Fuel tank leaking |7.2.1a| | 1 |
| Rear Motorcycle structure adversely modified |6.1.1b| | 1 |
| Centre Front Headlamp insecure |1.2.3b| | 1 |
| Centre Front Headlamp dipped beam affected by the operation of the horn |1.2.2c| | 1 |
| Fuel system component insecure |7.2.1b| | 1 |
| Centre Front All position lamps adversely affected by the operation of the horn |1.1.3b| | 1 |
| Centre Rear All position lamps adversely affected by the operation of the horn |1.1.3b| | 1 |
| Offside Front Lower Locking devices not correctly fitted which may make the motor bicycle dangerous to ride |6.2.1h| | 1 |
| Offside Front Plate brake test indicates a binding brake |3.3.B1a| | 1 |
| Rear Brake pedal has insufficient reserve travel (1.1.2 (a)) | 1 |
| Brake excessively binding REAR (1.2.1 (f)) | 1 |
| Roller brake test The less effective brake control does not achieve an efficiency of 25% (1.2.2 (a) (i)) | 1 |
| Rear Brake effort inadequate at a wheel (1.2.1 (a) (i)) | 1 |
| Steering headbearing has excessive free play (2.2.2) | 1 |
| Headlamp not working on main beam (4.1.1 (a) (ii)) | 1 |
| Headlamp not working on dipped beam (4.1.1 (a) (ii)) | 1 |
| Centre Front Headlamp main beam affected by the operation of the horn |1.2.2c| | 1 |