| Most common failures | No# failures |
|---|
| Headlamp aim out of alignment | 24 |
| Rear reflector on motorcycle missing |1.4.1| | 23 |
| Rear Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 9 |
| Horn not working |1.7.3a| | 9 |
| Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 9 |
| Rear wheel bearings have excessive free play |2.4.A.2c| | 8 |
| Rear position lamp does not illuminate immediately when it is switched on |1.1.3a| | 7 |
| Rear wheel spindle securing nut locking device missing |2.4.A.2b| | 7 |
| Steering headbearing has excessive free play |2.2.2| | 7 |
| Direction indicators not working |1.5.1c| | 6 |
| Rear suspension bush has excessive free play |2.4.A2a|i|| | 6 |
| 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| | 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| | 5 |
| Headlamp at least one does not illuminate on main beam |1.2.2a|ii|| | 5 |
| Rear Rear reflector on motorcycle missing |1.4.1| | 5 |
| Registration plate issues | 5 |
| Throttle operating incorrectly |6.2.1f| | 5 |
| Front wheel bearings have excessive free play |2.3.5b| | 5 |
| Rear Wheel spoke excessively loose |4.2.1b| | 4 |
| Drive chain excessively tight |6.2.1d| | 4 |
| Drive chain excessively loose |6.2.1d| | 4 |
| Exhaust is leaking and excessively noisey |7.1.1b| | 4 |
| Wheel alignment incorrect which adversely affects the steering |2.5.1| | 4 |
| Front Drive chain sprocket worn to excess |6.2.1e| | 4 |
| Front Brake lever has inadequate reserve travel |3.1.3b| | 4 |
| Front Direction indicator not working |1.5.1c| | 4 |
| Drive chain worn to excess |6.2.1e| | 4 |
| Locking device|s| not correctly fitted which may make the motor bicycle dangerous to ride |6.2.1h| | 4 |
| Horn not loud enough to be heard by another road user |1.7.3a| | 4 |
| Front shock absorber seal failed and leaking oil |2.3.3| | 4 |
| Wheel alignment incorrect which adversely affects the handling |2.5.1| | 4 |
| Headlamp at least one does not illuminate on dipped beam |1.2.2a|i|| | 4 |
| Headlamp aim not tested |1.6| | 4 |
| Front Wheel has an excessively distorted bead rim. |4.2.2| | 4 |
| Front Headlamp at least one does not illuminate on dipped beam |1.2.2a|i|| | 3 |
| Front Headlamp at least one does not illuminate on main beam |1.2.2a|ii|| | 3 |
| Front position lamp does not illuminate immediately when switched on |1.1.3a| | 3 |
| Rear wheel spindle securing nut locking device insecure |2.4.A.2b| | 3 |
| Front Wheel spoke excessively loose |4.2.1b| | 3 |
| Riders seat insecure |6.2.1a| | 3 |
| Direction indicator not working |1.5.1c| | 3 |
| Nearside Rear Footrest missing |6.2.1a| | 3 |
| Offside Rear Footrest missing |6.2.1a| | 3 |
| Roller brake test The less effective brake control does not achieve an efficiency of 25%. |3.3.A2b| | 3 |
| Rear Drive chain sprocket worn to excess |6.2.1e| | 3 |
| Front wheel spindle securing nut locking device missing |2.3.5a| | 3 |
| Offside Front Direction indicators not working |1.5.1c| | 3 |
| Brake lever has inadequate reserve travel |3.1.3b| | 3 |
| Front Roller brake test indicates a binding brake |3.3.A1a| | 3 |
| Steering movement excessively `notchy` with the wheel raised |2.2.1b| | 3 |
| Front Steering headbearing has excessive free play |2.2.2| | 2 |
| Offside Rear Direction indicator flashing less than 60 times a minute |1.5.1c| | 2 |
| Rear shock absorber has inadequate damping effect. |2.4.A.3b| | 2 |
| Nearside Rear Direction indicator insecure |1.5.3b| | 2 |
| Front wheel spindle securing nut locking device missing |2.3.3a| | 2 |
| Brake locking device missing |3.2.A1e| | 2 |
| Front Stop lamp missing |1.3.3a| | 2 |
| Direction indicator insecure |1.5.3b| | 2 |
| Stop lamp affected by the operation of another lamp |1.3.2| | 2 |
| Front Brake lever mounting insecure |3.1.2a| | 2 |
| Headlamp insecure |1.2.3b| | 2 |
| Steering movement excessively stiff with the wheel raised |2.2.1b| | 2 |
| Rear Wheel alignment incorrect which adversely affects the handling |2.5.1| | 2 |
| Rear Rear suspension bush has excessive free play |2.4.A2a|i|| | 2 |
| Offside Rear Direction indicators not working |1.5.1c| | 2 |
| Direction indicators affected by the operation of another lamp |1.5.1c| | 2 |
| Centre Rear Rear reflector on motorcycle missing |1.4.1| | 2 |
| Rear Footrest missing |6.2.1a| | 2 |
| Offside Rear Brake locking device missing |3.2.A1e| | 2 |
| Rear Stop lamp does not emit a steady light |1.3.1b| | 2 |
| Front suspension has excessive stiffness in the suspension movement. |2.3.6b| | 2 |
| Nearside Front Direction indicator not working |1.5.1c| | 2 |
| Offside Front Direction indicator not working |1.5.1c| | 2 |
| Rear Direction indicator not working |1.5.1c| | 2 |
| Nearside Rear Direction indicator missing |1.5.1a| | 2 |
| Centre Horn not working |1.7.3a| | 1 |
| Indicator switch defective |1.5.4| | 1 |
| Rear Rear position lamp adversely affected by the operation of another lamp |1.1.3b| | 1 |
| Front Headlamp dipped beam affected by the operation of another lamp |1.2.2c| | 1 |
| Front Headlamp main beam affected by the operation of another lamp |1.2.2c| | 1 |
| Rear Wheel spoke excessively bent |4.2.1b| | 1 |
| Nearside Front Direction indicator flashing less than 60 times a minute |1.5.1c| | 1 |
| Central Rear Stop lamp insecure fixings loose |1.3.3b| | 1 |
| Direction indicators flashing more than 120 times per minute |1.5.1c| | 1 |
| Nearside Front Direction indicator incorrect colour |1.5.1b| | 1 |
| Offside Front Direction indicator incorrect colour |1.5.1b| | 1 |
| Chain guard insecure |6.2.1c| | 1 |
| Offside Footrest insecure |6.2.1a| | 1 |
| Motorcycle structure cracked |6.1.1a| | 1 |
| Rear reflector missing (4.8.2 (a) (ii)) | 1 |
| Rear suspension component loose |2.4.A.1a| | 1 |
| Horn control not functioning. |1.7.2b| | 1 |
| Nearside Direction indicator missing |1.5.1a| | 1 |
| Offside Direction indicator missing |1.5.1a| | 1 |
| Headlamp switch faulty |1.2.4| | 1 |
| Rear Wheel corroded significantly reducing the original strength |4.2.1a| | 1 |
| Rear reflector on sidecar missing |1.4.1| | 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 Rear wheel bearings have excessive free play |2.4.A.2c| | 1 |
| Rear Chain guard insecure |6.2.1c| | 1 |
| Rear Drive chain worn to excess |6.2.1e| | 1 |
| Fuel system component insecure |7.2.1b| | 1 |
| Horn sounds harsh or grating |1.7.3c| | 1 |
| Brake lever insecure |3.1.2a| | 1 |
| Rear reflector on motorcycle obscured |1.4.1| | 1 |
| Rear Rear suspension bearing has excessive free play |2.4.A2a|i|| | 1 |
| Stop lamp remains on when the brake is released bulb maybe in wrong way |1.3.1e| | 1 |
| Drive chain fouling another component |6.2.1d| | 1 |
| Front suspension assembly component excessively bent |2.3.1| | 1 |
| Rear Roller brake test indicates a severely grabbing brake |3.3.A1b| | 1 |
| Direction indicator affected by the operation of another lamp |1.5.1c| | 1 |
| Nearside Front Footrest insecure (6.2.12 (a)) | 1 |
| Front Headlamp aim beam image too far to the right |1.6.4| | 1 |
| Rear Brake locking device missing |3.2.A1e| | 1 |
| Rear Drive chain excessively tight |6.2.1d| | 1 |
| Front wheel spindle securing nut locking device insecure |2.3.5a| | 1 |
| Rear reflector on motorcycle missing (1.4.1) | 1 |
| 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 Front Front shock absorber seal failed and leaking oil (2.3.3) | 1 |
| Rear suspension component excessively corroded. (2.4.A.1a) | 1 |
| Nearside Rear Direction indicator insecure (1.5.3b) | 1 |
| Front Roller brake test indicates brake effort rise disproportional to brake lever or pedal effort (3.3.A1c) | 1 |
| Roller brake test The less effective brake control does not achieve an efficiency of 25%. (3.3.A2b) | 1 |
| Headlamp at least one does not illuminate on dipped beam (1.2.2a(i)) | 1 |
| Centre Front Dipswitch does not deflect the main beam/s, making them into dipped beam/s |1.2.2b|ii|| | 1 |
| Front Wheel spoke cracked. |4.2.1b| | 1 |
| Front Front suspension has excessive stiffness in the suspension movement. |2.3.6b| | 1 |
| Front Brake lever is so short and the brake cannot be readily applied |3.1.3c| | 1 |
| Rear wheel bearings are excessively rough |2.4.A.2c| | 1 |
| Floor brake test The less effective brake control does not achieve an efficiency of 25%. |3.3.C1b| | 1 |
| Headlamp aim headlamp deteriorated and function impaired |1.2.3a| | 1 |
| Stop lamp deteriorated and function impaired |1.3.3a| | 1 |
| Rear Locking devices not correctly fitted which may make the motor bicycle dangerous to ride |6.2.1h| | 1 |
| Rear position lamp damaged and function impaired |1.1.1b| | 1 |
| Front Direction indicators not working |1.5.1c| | 1 |
| Rear Direction indicators not working |1.5.1c| | 1 |
| Brake pedal has inadequate reserve travel |3.1.3b| | 1 |
| Rear Brake reaction bracket securing bolt|s| missing |3.2.A1j| | 1 |
| Offside Front Front wheel spindle securing nut locking device missing |2.3.3a| | 1 |
| Rear All position lamps adversely affected by the operation of another lamp |1.1.3b| | 1 |
| Offside Rear Direction indicator not working (4.4.1 (a) (ii)) | 1 |
| Front Lower Engine mounting/bracket damaged or deteriorated resulting in excessive movement (6.1.8 (a) (i)) | 1 |
| Drive chain worn to excess (6.1.7 (c) (i)) | 1 |
| Stop lamp remains on when the brakes are released | 1 |
| All direction indicators not working All indicators not working (4.4.1 (a) (ii)) | 1 |
| Offside All direction indicators not working Only work sometimes |4.4.1 |a| |ii|| | 1 |
| Rear Rear reflector missing |4.8.2 |a| |ii|| | 1 |
| Rear Brake rod excessively chafed |3.2.A1a| | 1 |
| Horn is not continous or uniform |1.7.3c| | 1 |
| Offside Front Direction indicator flashing less than 60 times a minute |1.5.1c| | 1 |
| Nearside Front shock absorber seal failed and leaking oil |2.3.3| | 1 |
| Brake locking device insecure |3.2.A1e| | 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 |
| Front Horn not working (7.7 (a) (ii)) | 1 |
| Offside Front Direction indicator not working (4.4.1 (a) (ii)) | 1 |
| Rear Brake locking device insecure brake |3.2.A1e| | 1 |
| Rear Brake linkage has abnormal movement due to excessive wear |3.2.A1i| | 1 |
| Offside Front Brake locking device missing |3.2.A1e| | 1 |
| Upper Rear suspension has corrosion which reduces the strength of a load bearing member or its supporting structure. |2.4.A.2d| | 1 |
| Indicator switch insecure |1.5.4| | 1 |
| Direction indicators flashing less than 60 times a minute |1.5.1c| | 1 |
| Headlamp main beam affected by the operation of another lamp |1.2.2c| | 1 |
| Rear position lamp adversely affected by the operation of another lamp |1.1.3b| | 1 |
| Rear Decelerometer brake test indicates a sticking brake |3.3.E1d| | 1 |
| Decelerometer brake test the less effective brake control does not achieve an efficiency of 25%. |3.3.E1b| | 1 |
| Offside Front Front shock absorber seal failed and leaking oil |2.3.3| | 1 |
| Rear Brake linkage excessively damaged |3.2.A1c| | 1 |
| Front suspension assembly component loose |2.3.1| | 1 |
| Stop lamp affected by the operation of the horn |1.3.2| | 1 |
| Front All position lamps do not illuminate immediately when switched on |1.1.3a| | 1 |
| Rear All position lamps do not illuminate immediately when switched on |1.1.3a| | 1 |
| Rear Rear position lamp insecure |1.1.1c| | 1 |
| Front Stop lamp affected by the operation of another lamp |1.3.2| | 1 |
| Front Front mudguard insecure |2.3.7| | 1 |
| Indicator tell tale not functioning |1.5.2| | 1 |
| Brake lever attachment screws loose Lock nut missing. |3.1.2b| | 1 |
| Front Brake lining|s| less than 1.5 mm thick |3.2.A1f|i|| | 1 |
| Rear Brake reaction bracket insecure |3.2.A1j| | 1 |
| Front Stop lamp remains on when the brake is released |1.3.1e| | 1 |
| Offside Rear Direction indicator missing |1.5.1a| | 1 |
| Horn missing |1.7.1| | 1 |
| Nearside Front Direction indicators not working |1.5.1c| | 1 |
| Nearside Direction indicators not working |1.5.1c| | 1 |
| Steering movement excessively `notchy` with the weight on the lower bearing |2.2.1a| | 1 |
| Locking devices not correctly fitted which may make the motor bicycle dangerous to ride |6.2.1h| | 1 |
| Front Brake lever is damaged and the brake cannot be readily applied |3.1.3c| | 1 |
| Rear Brake pedal has inadequate reserve travel |3.1.3b| | 1 |
| Front Steering movement excessively `notchy` with the weight on the lower bearing |2.2.1a| | 1 |
| Brake reaction bracket insecure |3.2.A1j| | 1 |
| Steering control handlebar movement restricted by cables caught on a projection |2.1.2c| | 1 |
| Offside Steering lock stop ineffective |2.1.3| | 1 |
| Front Floor brake test indicates a binding brake |3.3.C2c| | 1 |
| Handlebar mounting clamp loose |2.1.1a| | 1 |
| Rear Wheel has an excessively distorted bead rim. |4.2.2| | 1 |
| Rear Brake lining|s| less than 1.5 mm thick |3.2.A1f|i|| | 1 |
| Front Steering control handlebar movement restricted by cables caught on a projection |2.1.2c| | 1 |
| Rear Locking device|s| not correctly fitted which may make the motor bicycle dangerous to ride |6.2.1h| | 1 |
| Front suspension has inadequate damping effect. |2.3.6c| | 1 |