| Most common failures | No# failures |
|---|
| Headlamp aim out of alignment | 9 |
| Rear reflector on motorcycle missing |1.4.1| | 7 |
| Registration plate issues | 7 |
| Rear Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 6 |
| Rear position lamp does not illuminate immediately when it is switched on |1.1.3a| | 5 |
| Horn not working |1.7.3a| | 5 |
| Headlamp at least one does not illuminate on main beam |1.2.2a|ii|| | 5 |
| Steering movement excessively `notchy` with the weight on the lower bearing |2.2.1a| | 5 |
| Steering headbearing has excessive free play |2.2.2| | 5 |
| Nearside Front shock absorber seal failed and leaking oil |2.3.3| | 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 |
| Direction indicators not working |1.5.1c| | 4 |
| Headlamp at least one does not illuminate on dipped beam |1.2.2a|i|| | 4 |
| Rear shock absorber has inadequate damping effect. |2.4.A.3b| | 4 |
| Front Brake lever has inadequate reserve travel |3.1.3b| | 4 |
| Front Front suspension has inadequate damping effect. |2.3.6c| | 3 |
| Roller brake test The less effective brake control does not achieve an efficiency of 25%. |3.3.A2b| | 3 |
| Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 3 |
| Offside Rear Direction indicators not working |1.5.1c| | 3 |
| Front suspension has inadequate damping effect. |2.3.6c| | 3 |
| Front Roller brake test indicates a sticking brake |3.3.A1a| | 3 |
| Direction indicators flashing less than 60 times a minute |1.5.1c| | 3 |
| Direction indicators affected by the operation of another lamp |1.5.1c| | 3 |
| Offside Front shock absorber seal failed and leaking oil |2.3.3| | 3 |
| Nearside Rear Direction indicator not working |1.5.1c| | 3 |
| Offside Direction indicator flashing less than 60 times a minute |1.5.1c| | 3 |
| Front position lamp does not illuminate immediately when switched on |1.1.3a| | 2 |
| Front Stop lamp remains on when the brake is released |1.3.1e| | 2 |
| Fuel system component leaking |7.2.1a| | 2 |
| Front Direction indicators not working |1.5.1c| | 2 |
| Steering movement excessively `notchy` with the wheel raised |2.2.1b| | 2 |
| Rear Direction indicators not working |1.5.1c| | 2 |
| 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| | 2 |
| Exhaust is leaking and excessively noisey |7.1.1b| | 2 |
| Drive chain excessively loose |6.2.1d| | 2 |
| Nearside Direction indicators not working |1.5.1c| | 2 |
| Offside Direction indicators not working |1.5.1c| | 2 |
| Nearside Direction indicator flashing less than 60 times a minute |1.5.1c| | 2 |
| Rear Direction indicator flashing less than 60 times a minute |1.5.1c| | 2 |
| Rear Rear reflector on motorcycle missing |1.4.1| | 2 |
| Front Footrest insecure |6.2.1a| | 2 |
| Front Wheel spoke excessively loose |4.2.1b| | 2 |
| Direction indicator affected by the operation of another lamp |1.5.1c| | 2 |
| Front Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 2 |
| Rear reflector on motorcycle obscured |1.4.1| | 2 |
| Rear Wheel alignment incorrect which adversely affects the handling |2.5.1| | 1 |
| Handlebar mounting clamp loose |2.1.1a| | 1 |
| Front Brake lever pivots excessively worn |3.1.3a| | 1 |
| Upper Handlebar mounting clamp bolt loose |2.1.1a| | 1 |
| Brake lever has inadequate reserve travel |3.1.3b| | 1 |
| Rear suspension bush has excessive free play |2.4.A2a|i|| | 1 |
| Exhaust mounting does not fully support the exhaust system |7.1.1.c| | 1 |
| Nearside Front Direction indicators not working |1.5.1c| | 1 |
| Nearside Rear Direction indicators not working |1.5.1c| | 1 |
| Offside Front Direction indicators not working |1.5.1c| | 1 |
| Rear Wheel spoke excessively loose |4.2.1b| | 1 |
| Rear Stop lamp affected by the operation of another lamp |1.3.2| | 1 |
| Front Stop lamp affected by the operation of another lamp |1.3.2| | 1 |
| Front Direction indicators affected by the operation of another lamp |1.5.1c| | 1 |
| Rear Direction indicators affected by the operation of another lamp |1.5.1c| | 1 |
| Rear reflector on motorcycle damaged and function impaired |1.4.2a| | 1 |
| Nearside Rear shock absorber has inadequate damping effect. |2.4.A.3b| | 1 |
| Offside Rear shock absorber has inadequate damping effect. |2.4.A.3b| | 1 |
| Front Front shock absorber seal failed and leaking oil |2.3.3| | 1 |
| Nearside Locking devices not correctly fitted which may make the motor bicycle dangerous to ride |6.2.1h| | 1 |
| Headlamp aim so that beam "kick up" is not visible on the screen |4.1.2 |a|| | 1 |
| Rear reflector missing |4.8.2 |a| |ii|| | 1 |
| Front Direction indicator not working |1.5.1c| | 1 |
| Rear Direction indicator not working |1.5.1c| | 1 |
| Offside Front Fuel system component leaking |6.1.3 |b| |i|| | 1 |
| Offside Front Suspension component corroded and seriously weakened chrome missing |5.3.3 |b| |i|| | 1 |
| Throttle operating incorrectly |6.2.1f| | 1 |
| Front Headlamp aim headlamp damaged and function impaired |1.2.3a| | 1 |
| Stop lamp does not illuminate immediately a brake applies Front and Rear |1.3.1a| | 1 |
| Steering movement excessively stiff with the weight on the lower bearing |2.2.1a| | 1 |
| Locking device|s| not correctly fitted which may make the motor bicycle dangerous to ride |6.2.1h| | 1 |
| Rear wheel bearings have excessive free play |2.4.A.2c| | 1 |
| Front Floor brake test indicates a binding brake |3.3.C2c| | 1 |
| Front wheel spindle securing nut|s| loose |2.3.5a| | 1 |
| Nearside Handlebar handgrip not secure to handlebars. |2.1.1c| | 1 |
| Front Floor brake test indicates a severely grabbing brake |3.3.C2d| | 1 |
| All position lamps do not illuminate immediately when switched on |1.1.3a| | 1 |
| Front Roller brake test indicates a severely juddering brake |3.3.A1b| | 1 |
| Front Headlamp at least one does not illuminate on main beam |1.2.2a|ii|| | 1 |
| Front Horn not working |1.7.3a| | 1 |
| Drive chain worn to excess |6.2.1e| | 1 |
| Offside Rear Direction indicator obscured |1.5.1a| | 1 |
| Handlebar deformed |2.1.1b| | 1 |
| Wheel alignment incorrect which adversely affects the handling |2.5.1| | 1 |
| Brake pedal pivots excessively worn |3.1.3a| | 1 |
| Brake locking device missing |3.2.A1e| | 1 |
| Nearside Front Direction indicator not working |1.5.1c| | 1 |
| Rear wheel rotation likely to be impeded |6.2.1b| | 1 |
| Exhaust excessively deteriorated |7.1.1a| | 1 |
| Rear Brake reaction bracket securing bolt|s| loose |3.2.A1j| | 1 |
| Front Steering movement excessively `notchy` with the wheel raised |2.2.1b| | 1 |
| Front Exhaust is leaking and excessively noisey |7.1.1b| | 1 |
| Front Direction indicator flashing less than 60 times a minute |1.5.1c| | 1 |
| Front Front position lamp does not illuminate immediately when switched on |1.1.3a| | 1 |
| Rear Direction indicator insecure |1.5.3b| | 1 |
| Rear position lamp insecure |1.1.1c| | 1 |
| Offside Rear Direction indicator not working |1.5.1c| | 1 |
| Direction indicator not working |1.5.1c| | 1 |
| Headlamp insecure |1.2.3b| | 1 |
| Steering movement excessively stiff with the wheel raised |2.2.1b| | 1 |
| Nearside Front Front shock absorber seal failed and leaking oil |2.3.3| | 1 |
| Front Brake cable badly frayed |3.2.A1b| | 1 |
| Drive chain excessively tight |6.2.1d| | 1 |
| Front wheel spindle securing nut locking device missing |2.3.3a| | 1 |
| Rear Exhaust is leaking and excessively noisey |7.1.1b| | 1 |
| Brake linkage has abnormal movement due to maladjustment |3.2.A1i| | 1 |
| Front wheel bearings have excessive free play |2.3.5b| | 1 |
| Rear wheel spindle securing nut locking device missing |2.4.A.2b| | 1 |
| Locking devices not correctly fitted which may make the motor bicycle dangerous to ride rear torque arm bolt loose and locking device missing |6.2.1h| | 1 |
| Horn missing |1.7.1| | 1 |
| Nearside Direction indicator not working |1.5.1c| | 1 |
| Offside Direction indicator not working |1.5.1c| | 1 |
| Offside Handlebar handgrip not secure to handlebars. |2.1.1c| | 1 |
| Rear Brake pedal has inadequate reserve travel |3.1.3b| | 1 |
| Wheel alignment incorrect which adversely affects the steering |2.5.1| | 1 |
| Floor brake test The less effective brake control does not achieve an efficiency of 25%. |3.3.C1b| | 1 |
| Stop lamp remains on when the brake is released |1.3.1e| | 1 |
| Rear Stop lamp not working (4.3.1 (a) (ii)) | 1 |
| Offside Front Throttle operating incorrectly throttle sticking on (6.2.7 (a) (i)) | 1 |