| Most common failures | No# failures |
|---|
| Headlamp aim out of alignment | 14 |
| Registration plate issues | 6 |
| Horn not working |1.7.3a| | 5 |
| Steering headbearing has excessive free play |2.2.2| | 4 |
| Front Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 3 |
| Rear reflector on motorcycle missing |1.4.1| | 3 |
| Rear wheel spindle securing nut locking device missing |2.4.A.2b| | 3 |
| Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 2 |
| Offside Rear Direction indicator not working |1.5.1c| | 2 |
| Nearside Handlebar handgrip not secure to handlebars. |2.1.1c| | 2 |
| Nearside Front Direction indicator not working |1.5.1c| | 2 |
| Fuel system component leaking |7.2.1a| | 2 |
| Rear Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 2 |
| Throttle operating incorrectly |6.2.1f| | 2 |
| Locking device|s| not correctly fitted which may make the motor bicycle dangerous to ride |6.2.1h| | 2 |
| Stop lamp affected by the operation of another lamp (1.3.2) | 1 |
| Horn is not a constant note (1.7.3c) | 1 |
| Rear reflector on motorcycle missing (1.4.1) | 1 |
| Nearside Front shock absorber seal failed and leaking oil (2.3.3) | 1 |
| Front Steering movement excessively notchy with the weight on the lower bearing (2.2.1a) | 1 |
| Front Steering movement excessively stiff with the wheel raised (2.2.1b) | 1 |
| Front Steering movement excessively notchy with the wheel raised (2.2.1b) | 1 |
| Rear Roller brake test indicates a binding brake (3.3.A1a) | 1 |
| Drive chain excessively tight (6.2.1d) | 1 |
| Nearside Front Brake disc|s| excessively worn |3.2.A1l| | 1 |
| Offside Front Brake fluid reservoir fluid level dangerously low |3.2.B1d| | 1 |
| Nearside Front Brake hose leaking fluid |3.2.B4| | 1 |
| Headlamp aim headlamp deteriorated and function impaired |1.2.3a| | 1 |
| Headlamp insecure |4.1.1 |c|| | 1 |
| Rear Suspension component pin or bush excessively worn swing arm |5.3.4 |a| |i|| | 1 |
| Front Brake indicates excessive fluctuation of brake effort |1.2.1 |e|| | 1 |
| Steering movement excessively `notchy` with the weight on the lower bearing |2.2.1a| | 1 |
| Rear Locking device|s| not correctly fitted which may make the motor bicycle dangerous to ride Bolt missing sproket |6.2.1h| | 1 |
| Stop lamp not working |4.3.1 |a| |ii|| | 1 |
| Rear Rear wheel bearings have excessive free play |2.4.A.2c| | 1 |
| Rear Drive chain worn to excess |6.2.1e| | 1 |
| Headlamp aim not tested |1.6| | 1 |
| Rear suspension bearing has excessive free play |2.4.A2a|i|| | 1 |
| Headlamp at least one does not illuminate on dipped beam |1.2.2a|i|| | 1 |
| Headlamp at least one does not illuminate on main beam |1.2.2a|ii|| | 1 |
| Rear position lamp does not illuminate immediately when it is switched on |1.1.3a| | 1 |
| Drive chain excessively loose |6.2.1d| | 1 |
| Rear Brake caliper|s| insecure |3.2.A1j| | 1 |
| Front Exhaust is leaking and excessively noisey |7.1.1b| | 1 |
| Front 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 |
| Nearside Rear Direction indicator affected by the operation of another lamp |1.5.1c| | 1 |
| Front Roller brake test indicates a sticking brake |3.3.A1a| | 1 |
| Nearside Front Direction indicators affected by the operation of another lamp |1.5.1c| | 1 |
| Offside Rear Direction indicators affected by the operation of another lamp |1.5.1c| | 1 |
| Nearside Rear Drive chain worn to excess |6.2.1e| | 1 |
| Inner Rear Rear wheel bearings are excessively rough |2.4.A.2c| | 1 |
| Nearside Rear Drive chain excessively loose |6.2.1d| | 1 |
| Inner Rear Rear mono-shock pivot excessively worn |2.4.B.4| | 1 |
| Nearside Front Brake component has restricted free movement and operation is likely to be impeded |3.2.A1h| | 1 |
| Front Steering headbearing has excessive free play |2.2.2| | 1 |
| Front Front shock absorber seal failed and leaking oil |2.3.3| | 1 |
| Front Front wheel bearings have excessive free play |2.3.5b| | 1 |
| Rear Brake component is excessively corroded |3.1.5| | 1 |
| Roller brake test The less effective brake control does not achieve an efficiency of 25%. |3.3.A2b| | 1 |
| Front Brake lever has inadequate reserve travel |3.1.3b| | 1 |
| Front Headlamp aim so that beam "kick up" is not visible on the screen |1.6.B.1| | 1 |
| Horn missing |1.7.1| | 1 |
| Rear Rear reflector on motorcycle missing |1.4.1| | 1 |
| Front Direction indicators not working |1.5.1c| | 1 |
| Front Horn control not functioning. |1.7.2b| | 1 |
| Direction indicator affected by the operation of another lamp |1.5.1c| | 1 |
| Headlamp dipped beam affected by the operation of the horn |1.2.2c| | 1 |
| Headlamp main beam affected by the operation of the horn |1.2.2c| | 1 |
| Horn not loud enough to be heard by another road user |1.7.3a| | 1 |
| Rear Stop lamp affected by the operation of another lamp |1.3.2| | 1 |
| Direction indicators affected by the operation of another lamp (1.5.1c) | 1 |
| Front wheel spindle securing nut locking device missing |2.3.3a| | 1 |
| Direction indicators flashing less than 60 times a minute (1.5.1c) | 1 |
| Rear shock absorber has inadequate damping effect. |2.4.A.3b| | 1 |
| Rear Brake reaction bracket securing bolt|s| loose |3.2.A1j| | 1 |
| Steering lock stop ineffective |2.1.3| | 1 |
| Exhaust mounting missing |7.1.1c| | 1 |
| Exhaust is leaking and excessively noisey |7.1.1b| | 1 |
| Lower Rear mono-shock pivot excessively worn |2.4.B.4| | 1 |
| Front Brake disc|s| excessively worn |3.2.A1l| | 1 |
| Front Wheel spoke excessively loose |4.2.1b| | 1 |
| Rear Wheel spoke excessively loose |4.2.1b| | 1 |
| Front Brake caliper|s| securing bolt|s| missing |3.2.A1j| | 1 |
| Brake lever mounting insecure |3.1.2a| | 1 |
| Indicator switch insecure |1.5.4| | 1 |
| Steering control fouling between components which interferes with the free movement of the steering |2.1.2a| | 1 |
| Nearside Front Footrest insecure |6.2.1a| | 1 |
| Offside Front Footrest insecure |6.2.1a| | 1 |
| Offside Front Direction indicator not working |1.5.1c| | 1 |
| Nearside Rear Direction indicator not working |1.5.1c| | 1 |
| Throttle has a significant change in engine speed whilst moving the steering from lock to lock |2.1.4| | 1 |
| Rear Rear suspension bush has excessive free play |2.4.A2a|i|| | 1 |