| Most common failures | No# failures |
|---|
| Horn not working |1.7.3a| | 16 |
| Rear reflector on motorcycle missing |1.4.1| | 16 |
| Front position lamp does not illuminate immediately when switched on |1.1.3a| | 12 |
| Headlamp aim out of alignment | 12 |
| Registration plate issues | 11 |
| Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 9 |
| Headlamp at least one does not illuminate on main beam |1.2.2a|ii|| | 7 |
| Rear wheel spindle securing nut locking device missing |2.4.A.2b| | 7 |
| Direction indicators not working |1.5.1c| | 7 |
| Headlamp at least one does not illuminate on dipped beam |1.2.2a|i|| | 6 |
| Front Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 6 |
| Nearside Handlebar handgrip not secure to handlebars. |2.1.1c| | 6 |
| Rear Rear reflector on motorcycle missing |1.4.1| | 6 |
| Rear Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 5 |
| Horn not loud enough to be heard by another road user |1.7.3a| | 5 |
| Stop lamp affected by the operation of another lamp |1.3.2| | 5 |
| Rear position lamp does not illuminate immediately when it is switched on |1.1.3a| | 5 |
| Front wheel spindle securing nut locking device missing |2.3.3a| | 5 |
| Rear Wheel spoke excessively loose |4.2.1b| | 5 |
| Rear wheel bearings have excessive free play |2.4.A.2c| | 5 |
| Drive chain excessively loose |6.2.1d| | 5 |
| Direction indicators flashing less than 60 times a minute |1.5.1c| | 4 |
| Front Front wheel spindle securing nut locking device missing |2.3.3a| | 3 |
| Roller brake test No brake control achieves an efficiency of 30%. |3.3.A2a| | 3 |
| Rear shock absorber has inadequate damping effect. |2.4.A.3b| | 3 |
| Headlamp aim not tested |1.6| | 2 |
| Nearside Rear Footrest missing |6.2.1a| | 2 |
| Rear suspension bush has excessive free play |2.4.A2a|i|| | 2 |
| Rear Rear suspension bush has excessive free play |2.4.A2a|i|| | 2 |
| Throttle has a significant change in engine speed whilst moving the steering from lock to lock |2.1.4| | 2 |
| Rear mono-shock insecure |2.4.B.4| | 2 |
| Roller brake test Neither brake control achieves an efficiency of 25% |3.3.A2b| | 2 |
| Front wheel bearings are excessively rough |2.3.5b| | 2 |
| Steering headbearing has excessive free play |2.2.2| | 2 |
| Drive chain worn to excess |6.2.1e| | 2 |
| Headlamp aim beam image kick up to the offside |1.6| | 2 |
| Rear Brake pedal has inadequate reserve travel |3.1.3b| | 2 |
| Horn not working |7.7 |a| |ii|| | 2 |
| Headlamp insecure |1.2.3b| | 2 |
| Direction indicators affected by the operation of another lamp |1.5.1c| | 2 |
| All position lamps do not illuminate immediately when switched on |1.1.3a| | 2 |
| Throttle operating incorrectly |6.2.1f| | 2 |
| Exhaust is leaking and excessively noisey |7.1.1b| | 2 |
| Centre Front Front position lamp does not illuminate immediately when switched on |1.1.3a| | 2 |
| Headlamp dipped beam affected by the operation of another lamp |1.2.2c| | 2 |
| Handlebar mounting clamp bolt loose |2.1.1a| | 2 |
| Headlamp switch faulty |1.2.4| | 2 |
| Steering lock stop loose |2.1.3| | 2 |
| Brake lever has inadequate reserve travel |3.1.3b| | 2 |
| Drive chain excessively tight |6.2.1d| | 1 |
| Direction indicator not working |1.5.1c| | 1 |
| Rear Stop lamp affected by the operation of another lamp |1.3.2| | 1 |
| Nearside Front Direction indicators affected by the operation of another lamp |1.5.1c| | 1 |
| Offside Front Direction indicators affected by the operation of another lamp |1.5.1c| | 1 |
| Nearside Rear 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 |
| Offside Rear Footrest insecure |6.2.1a| | 1 |
| Rear Footrest missing BOTH (6.2.12 (a)) | 1 |
| Front Wheel spindle or securing nut(s) so insecure that wheel security or steering control is adversely affected (5.2.1 (c) (ii)) | 1 |
| Front Direction indicator not working |1.5.1c| | 1 |
| Rear Direction indicator not working |1.5.1c| | 1 |
| Front shock absorber seal failed and leaking oil |2.3.3| | 1 |
| Position lamp switch insecure |1.1.4b| | 1 |
| Brake performance not tested |3.3| | 1 |
| Rear Brake pedal insecure |3.1.2a| | 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 |
| Rear suspension bearing has excessive free play |2.4.A2a|i|| | 1 |
| Offside Front Direction indicator not working |1.5.1c| | 1 |
| Rear position lamp insecure |1.1.1c| | 1 |
| Rear Brake lining|s| less than 1.5 mm thick |3.2.A1f|i|| | 1 |
| Headlamp aim projected beam image obviously incorrect (4.1.2 (c)) | 1 |
| Front Wheel spindle locking device missing (5.2.1 (d)) | 1 |
| Front Wheel spindle loose (5.2.1 (c) (i)) | 1 |
| Rear Footrest missing Pillion. |6.2.1a| | 1 |
| Rear Drive chain sprocket worn to excess |6.2.1e| | 1 |
| Horn not working (7.7 (a) (ii)) | 1 |
| Headlamp aim so that beam "kick up" is not visible on the screen (4.1.2 (a)) | 1 |
| Steering movement excessively stiff with the wheel raised |2.2.1b| | 1 |
| Steering movement excessively `notchy` with the weight on the lower bearing |2.2.1a| | 1 |
| Front wheel spindle securing nut locking device missing |2.3.5a| | 1 |
| Rear reflector on motorcycle missing Yellow reflector incorrectly fitted |1.4.1| | 1 |
| Rear suspension bush has excessive free play Swingarm pivot |2.4.A2a|i|| | 1 |
| Front Brake lever cannot be released smoothly |3.1.3d| | 1 |
| Position lamp not working rear |4.2.1 |a|| | 1 |
| Stop lamp not working |4.3.1 |a| |ii|| | 1 |
| Wheel spoke excessively loose rear |5.2.2 |d|| | 1 |
| Indicator switch does not operate the direction indicators on the side selected |1.5.4| | 1 |
| Front wheel bearings have excessive free play |2.3.5b| | 1 |
| Rear mono-shock pivot excessively worn |2.4.B.4| | 1 |
| Front Wheel has an excessively distorted bead rim. |4.2.2| | 1 |
| Brake pedal pivots excessively worn |3.1.3a| | 1 |
| Offside Rear Footrest missing |6.2.1a| | 1 |
| Nearside Exhaust is leaking and excessively noisey |7.1.1b| | 1 |
| Nearside Locking device|s| not correctly fitted which may make the motor bicycle dangerous to ride |6.2.1h| | 1 |
| Rear wheel spindle loose |2.4.A.2b| | 1 |
| Rear Wheel spoke missing |4.2.1b| | 1 |
| Steering movement excessively `notchy` with the wheel raised |2.2.1b| | 1 |
| All position lamps adversely affected by the operation of another lamp |1.1.3b| | 1 |
| Headlamp aim headlamp deteriorated and function impaired |1.2.3a| | 1 |
| Position lamp switch does not operate the front and rear position lamps |1.1.4c| | 1 |
| Drive chain sprocket carrier worn to excess |6.2.1e| | 1 |
| Fuel hose leaking |7.2.1a| | 1 |
| Rear Roller brake test indicates a sticking brake |3.3.A1a| | 1 |
| Steering movement excessively stiff with the weight on the lower bearing |2.2.1a| | 1 |
| Rear Footrest missing |6.2.1a| | 1 |
| Headlamp aim so that beam "kick up" is not visible on the screen |4.1.2 |a|| | 1 |
| Rear Rear reflector missing |4.8.2 |a| |ii|| | 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 |
| Centre Rear Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 1 |
| Centre Rear Riders seat insecure |6.2.1a| | 1 |
| Offside Front Footrest insecure |6.2.1a| | 1 |
| Nearside 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 |
| Centre Front Horn not loud enough to be heard by another road user |1.7.3a| | 1 |
| Centre Rear Rear wheel rotation likely to be impeded |6.2.1b| | 1 |
| Nearside Front shock absorber seal failed and leaking oil |2.3.3| | 1 |
| Nearside Headlamp switch insecure |1.2.4| | 1 |
| Nearside Indicator switch insecure |1.5.4| | 1 |
| Rear Rear wheel spindle securing nut locking device missing |2.4.A.2b| | 1 |
| Front Steering control handlebar movement restricted by trapped cables |2.1.2c| | 1 |
| Front Direction indicators affected by the operation of another lamp |1.5.1c| | 1 |
| Front Front position lamp damaged and function impaired |1.1.1b| | 1 |
| Rear Stop lamp does not emit a steady light |1.3.1b| | 1 |
| Rear Rear position lamp damaged and function impaired |1.1.1b| | 1 |
| Front Front wheel spindle securing nut locking device missing |2.3.5a| | 1 |
| Rear Rear suspension movement is excessively stiff |2.4.A.3b| | 1 |
| Nearside Drive chain excessively tight |6.2.1d| | 1 |
| Nearside Front Handlebar handgrip not secure to handlebars. |2.1.1c| | 1 |
| Front Steering headbearing has excessive free play |2.2.2| | 1 |
| Rear Rear wheel bearings have excessive free play |2.4.A.2c| | 1 |
| Nearside Direction indicators not working |1.5.1c| | 1 |
| Offside Direction indicators not working |1.5.1c| | 1 |
| Front Brake lever has inadequate reserve travel |3.1.3b| | 1 |
| Floor brake test The less effective brake control does not achieve an efficiency of 25%. |3.3.C1b| | 1 |
| Nearside Rear Direction indicator insecure |1.5.3b| | 1 |
| Roller brake test The less effective brake control does not achieve an efficiency of 25%. |3.3.A2b| | 1 |
| Brake lever insecure |3.1.2a| | 1 |
| Front Horn not working |1.7.3a| | 1 |
| Nearside Direction indicator not working |1.5.1c| | 1 |
| Offside Direction indicator not working |1.5.1c| | 1 |
| Front Exhaust is leaking and excessively noisey |7.1.1b| | 1 |
| Lower Rear mono-shock pivot excessively worn |2.4.B.4| | 1 |
| Rear Brake pedal is damaged and the brake cannot be readily applied |3.1.3c| | 1 |
| Rear position lamp adversely affected by the operation of another lamp |1.1.3b| | 1 |
| Brake pedal cannot be applied smoothly |3.1.3d| | 1 |
| Brake pedal is inoperative |3.1.3c| | 1 |
| Rear Floor brake test indicates a severely grabbing brake |3.3.C2d| | 1 |
| Nearside Rear Footrest insecure |6.2.1a| | 1 |
| Front Brake lever insecure |3.1.2a| | 1 |
| Centre Front Headlamp dipped beam affected by the operation of another lamp |1.2.2c| | 1 |
| Nearside Rear Direction indicators not working |1.5.1c| | 1 |
| Centre Rear Rear reflector on motorcycle missing |1.4.1| | 1 |
| Nearside Rear Direction indicator deteriorated and function impaired |1.5.3a| | 1 |
| Offside Rear Direction indicator deteriorated and function impaired |1.5.3a| | 1 |
| Headlamp switch insecure |1.2.4| | 1 |
| Direction indicators flashing less than 60 times a minute all 4 |1.5.1c| | 1 |
| Nearside Front Steering lock stop missing |2.1.3| | 1 |
| Front Roller brake test indicates a severely grabbing brake |3.3.A1b| | 1 |
| Front Roller brake test indicates a binding brake |3.3.A1a| | 1 |
| Rear Rear position lamp does not illuminate immediately when it is switched on |1.1.3a| | 1 |
| Front Front position lamp adversely affected by the operation of another lamp |1.1.3b| | 1 |
| Rear Rear shock absorber has inadequate damping effect. |2.4.A.3b| | 1 |
| Front All position lamps do not illuminate immediately when switched on |1.1.3a| | 1 |
| Rear Exhaust is leaking and excessively noisey |7.1.1b| | 1 |
| Rear reflector missing (4.8.2 (a) (ii)) | 1 |
| Offside Steering lock stop ineffective |2.1.3| | 1 |
| Horn is not a constant note |1.7.3c| | 1 |
| Rear suspension movement is excessively stiff |2.4.A.3b| | 1 |
| Nearside Front Direction indicator not working |1.5.1c| | 1 |
| Locking devices not correctly fitted which may make the motor bicycle dangerous to ride |6.2.1h| | 1 |
| Nearside Rear Direction indicator missing |1.5.1a| | 1 |
| Offside Rear Direction indicator missing |1.5.1a| | 1 |
| Horn replaced by a bell |1.7.3b| | 1 |
| Offside Footrest insecure |6.2.1a| | 1 |