| Most common failures | No# failures |
|---|
| Headlamp aim out of alignment | 13 |
| Rear reflector on motorcycle missing |1.4.1| | 10 |
| Front Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 6 |
| Rear suspension bush has excessive free play |2.4.A2a|i|| | 6 |
| Horn not loud enough to be heard by another road user |1.7.3a| | 4 |
| Rear Rear shock absorber has inadequate damping effect. |2.4.A.3b| | 3 |
| Rear suspension bearing has excessive free play |2.4.A2a|i|| | 3 |
| Registration plate issues | 3 |
| Drive chain sprocket carrier worn to excess |6.2.1e| | 3 |
| Handlebar deformed |2.1.1b| | 2 |
| Steering headbearing has excessive free play |2.2.2| | 2 |
| Wheel alignment incorrect which adversely affects the handling |2.5.1| | 2 |
| Front Stop lamp missing |1.3.3a| | 2 |
| Front Fork yoke deformed |2.1.1b| | 2 |
| Rear mono-shock pivot excessively worn |2.4.B.4| | 2 |
| Roller brake test No brake control achieves an efficiency of 30%. |3.3.A2a| | 2 |
| Roller brake test Neither brake control achieves an efficiency of 25% |3.3.A2b| | 2 |
| Horn not working |1.7.3a| | 2 |
| Front wheel bearings are excessively rough |2.3.5b| | 2 |
| Front Brake lever has inadequate reserve travel |3.1.3b| | 2 |
| Rear position lamp does not illuminate immediately when it is switched on |1.1.3a| | 2 |
| Rear Brake reaction bracket insecure |3.2.A1j| | 2 |
| Rear wheel spindle securing nut locking device missing |2.4.A.2b| | 2 |
| Nearside Front Upper Headlamp switch faulty |1.2.4| | 1 |
| Horn control defective |1.7.2a| | 1 |
| Drive chain excessively loose |6.2.1d| | 1 |
| Nearside Rear Drive chain excessively tight |6.2.1d| | 1 |
| Rear Shock absorber has an excessively worn bush Excessive play in rear linkage bush (5.3.2 (c)) | 1 |
| Indicator switch does not operate the direction indicators on the side selected |1.5.4| | 1 |
| Steering movement excessively rough with the wheel raised |2.2.1b| | 1 |
| Rear Lower Rear suspension bush has excessive free play |2.4.A2a|i|| | 1 |
| Rear Exhaust mounting does not fully support the exhaust system |7.1.1.c| | 1 |
| Nearside Front Direction indicators not working |1.5.1c| | 1 |
| Front Headlamp insecure |1.2.3b| | 1 |
| Rear Rear wheel bearings have excessive free play |2.4.A.2c| | 1 |
| Headlamp aim headlamp damaged and function impaired |1.2.3a| | 1 |
| Locking device|s| not correctly fitted which may make the motor bicycle dangerous to ride |6.2.1h| | 1 |
| Nearside Direction indicators not working |1.5.1c| | 1 |
| Fuel cap sealing washer missing |7.2.2c| | 1 |
| Headlamp aim headlamp deteriorated and function impaired |1.2.3a| | 1 |
| Rear suspension bush excessively deteriorated |2.4.A2a|i|| | 1 |
| Centre Rear reflector on motorcycle missing |1.4.1| | 1 |
| Front Roller brake test indicates a severely grabbing brake |3.3.A1b| | 1 |
| Direction indicator not working |1.5.1c| | 1 |
| Front Stop lamp remains on when the brake is released |1.3.1e| | 1 |
| Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 1 |
| Front wheel bearings have excessive free play |2.3.5b| | 1 |
| Front Wheel spoke excessively loose |4.2.1b| | 1 |
| Rear 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| | 1 |
| Rear Brake reaction bracket securing bolt|s| loose |3.2.A1j| | 1 |
| Rear Drive chain sprocket carrier worn to excess |6.2.1e| | 1 |
| Headlamp aim beam image kick-up is to the offside |1.6.1| | 1 |
| Nearside Rear Footrest missing |6.2.1a| | 1 |
| Offside Rear Footrest missing |6.2.1a| | 1 |
| Rear Wheel spoke excessively loose |4.2.1b| | 1 |
| Rear Roller brake test indicates a binding brake |3.3.A1a| | 1 |
| Brake lever has inadequate reserve travel |3.1.3b| | 1 |
| All position lamps do not illuminate immediately when switched on |1.1.3a| | 1 |
| Front Wheel alignment incorrect which adversely affects the steering |2.5.1| | 1 |
| Direction indicators affected by the operation of another lamp |1.5.1c| | 1 |
| Lower Rear mono-shock pivot excessively worn |2.4.B.4| | 1 |
| Rear wheel has a loose wheel bolt|s| |4.2.3a| | 1 |
| Rear Drive chain worn to excess |6.2.1e| | 1 |
| Rear Wheel fractured significantly reducing the original strength |4.2.1a| | 1 |
| Throttle operating incorrectly |6.2.1f| | 1 |
| Fuel tank leaking |7.2.1a| | 1 |
| Rear Brake locking device missing |3.2.A1e| | 1 |
| Centre Front Horn not working |1.7.3a| | 1 |
| Centre Front Dipswitch does not deflect the main beam/s, making them into dipped beam/s |1.2.2b|ii|| | 1 |
| Offside Front Stop lamp does not emit a steady light |1.3.1b| | 1 |
| Centre Rear Rear reflector on motorcycle missing |1.4.1| | 1 |
| Inner Front Steering headbearing has excessive free play |2.2.2| | 1 |
| Centre Rear Wheel damaged significantly reducing the original strength |4.2.1a| | 1 |
| Headlamp at least one does not illuminate on dipped beam |1.2.2a|i|| | 1 |
| Rear Stop lamp emits other than a steady red light |1.3.1b| | 1 |
| Centre Rear Lower Rear suspension bearing has excessive free play |2.4.A2a|i|| | 1 |
| Front Brake locking device missing |3.2.A1e| | 1 |
| Exhaust mounting does not fully support the exhaust system |7.1.1.c| | 1 |
| Wheel alignment incorrect which adversely affects the steering |2.5.1| | 1 |
| Nearside Handlebar handgrip not secure to handlebars. |2.1.1c| | 1 |
| Offside Handlebar handgrip not secure to handlebars. |2.1.1c| | 1 |
| Front Roller brake test indicates a binding brake |3.3.A1a| | 1 |
| Rear wheel bearings have excessive free play |2.4.A.2c| | 1 |
| Direction indicator affected by the operation of another lamp |1.5.1c| | 1 |
| Headlamp dipped beam affected by the operation of another lamp |1.2.2c| | 1 |
| Rear reflector on motorcycle obscured |1.4.1| | 1 |
| Brake back plate|s| insecure |3.2.A1j| | 1 |
| Rear Stop lamp remains on when the brake is released |1.3.1e| | 1 |
| Rear Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 1 |
| Rear shock absorber has inadequate damping effect. |2.4.A.3b| | 1 |