| Most common failures | No# failures |
|---|
| Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 6 |
| Registration plate issues | 5 |
| Exhaust is leaking and excessively noisey |7.1.1b| | 4 |
| Rear position lamp does not illuminate immediately when it is switched on |1.1.3a| | 3 |
| Direction indicators not working |1.5.1c| | 3 |
| Headlamp at least one does not illuminate on dipped beam |1.2.2a|i|| | 3 |
| Drive chain excessively loose |6.2.1d| | 3 |
| Steering headbearing has excessive free play |2.2.2| | 3 |
| Rear position lamp adversely affected by the operation of another lamp |1.1.3b| | 2 |
| Headlamp aim out of alignment | 2 |
| Front wheel spindle securing nut locking device missing |2.3.3a| | 2 |
| 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 |
| Front Handlebar mounting clamp bolt loose |2.1.1a| | 2 |
| Front Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 2 |
| Handlebar deformed |2.1.1b| | 2 |
| Front Wheel spoke excessively loose |4.2.1b| | 2 |
| Offside Lower Rear suspension bush has excessive free play |2.4.A2a|i|| | 1 |
| Brake pedal cannot be applied smoothly |3.1.3d| | 1 |
| Drive chain worn to excess |6.2.1e| | 1 |
| Exhaust excessively deteriorated |7.1.1a| | 1 |
| Wheel alignment incorrect which adversely affects the handling |2.5.1| | 1 |
| Rear suspension fouling which affects the movement of the rear suspension |2.4.A.3a| | 1 |
| Handlebar mounting clamp loose |2.1.1a| | 1 |
| Nearside Handlebar mounting clamp bolt loose |2.1.1a| | 1 |
| Front Brake back plate|s| securing bolt|s| missing |3.2.A1j| | 1 |
| Front Stop lamp not working (4.3.1 (a) (ii)) | 1 |
| All direction indicators adversely affected by the operation of another lamp when lights are switched on (4.4.3 (b)) | 1 |
| Stop lamp not working when lights switched on (4.3.1 (a) (ii)) | 1 |
| Horn not working when lights switched on (7.7 (a)) | 1 |
| Rear Position lamp not working (4.2.1 (a)) | 1 |
| Stop lamp not working (4.3.1 (a) (ii)) | 1 |
| Front suspension assembly component loose |2.3.1| | 1 |
| Front Roller brake test indicates a sticking brake |3.3.A1a| | 1 |
| Steering movement excessively `notchy` with the weight on the lower bearing |2.2.1a| | 1 |
| Direction indicators affected by the operation of another lamp |1.5.1c| | 1 |
| Horn is not continous or uniform |1.7.3c| | 1 |
| Roller brake test The less effective brake control does not achieve an efficiency of 25%. |3.3.A2b| | 1 |
| Front Steering movement excessively stiff with the weight on the lower bearing |2.2.1a| | 1 |
| Headlamp main beam affected by the operation of the horn |1.2.2c| | 1 |
| Direction indicator not working |1.5.1c| | 1 |
| Stop lamp affected by the operation of the horn |1.3.2| | 1 |
| Headlamp at least one does not illuminate on main beam |1.2.2a|ii|| | 1 |
| Direction indicator flashing more than 120 times per minute |1.5.1c| | 1 |
| Offside Front suspension assembly excessive wear or free play in a front suspension component |2.3.4| | 1 |
| Front Front suspension has inadequate damping effect. |2.3.6c| | 1 |
| Handlebar mounting excessively deteriorated |flexible type| |2.1.1d| | 1 |
| Rear suspension movement is excessively stiff |2.4.A.3b| | 1 |
| Rear Rear shock absorber has inadequate damping effect. |2.4.A.3b| | 1 |
| Front Front position lamp does not illuminate immediately when switched on |1.1.3a| | 1 |
| Rear Rear position lamp does not illuminate immediately when it is switched on |1.1.3a| | 1 |
| Locking devices not correctly fitted which may make the motor bicycle dangerous to ride rear brake arm |6.2.1h| | 1 |
| Rear Wheel has an excessively distorted bead rim. |4.2.2| | 1 |
| Rear Wheel has an excessively eccentric bead rim. |4.2.2| | 1 |
| Nearside Front Direction indicator not working |1.5.1c| | 1 |
| Front wheel spindle loose |2.3.5a| | 1 |
| Horn not working |1.7.3a| | 1 |
| Brake lever has inadequate reserve travel |3.1.3b| | 1 |
| Rear Brake lining|s| less than 1.5 mm thick |3.2.A1f|i|| | 1 |
| Front Floor brake test indicates a severely grabbing brake |3.3.C2d| | 1 |
| Offside Front Throttle has a significant change in engine speed whilst moving the steering from lock to lock |2.1.4| | 1 |
| Front wheel bearings have excessive free play |2.3.5b| | 1 |
| Nearside Front Front wheel spindle securing nut locking device missing |2.3.3a| | 1 |
| Shock absorber has negligible damping effect |5.3.2 |b|| | 1 |
| Horn not loud enough to be heard by another road user |1.7.3a| | 1 |
| Front position lamp adversely affected by the operation of another lamp |1.1.3b| | 1 |
| Brake locking device missing |3.2.A1e| | 1 |
| Handlebar mounting clamp bolt loose |2.1.1a| | 1 |
| Headlamp aim not tested |1.6| | 1 |
| Throttle operating incorrectly |6.2.1f| | 1 |
| Front Headlamp at least one does not illuminate on dipped beam |1.2.2a|i|| | 1 |
| Front Headlamp at least one does not illuminate on main beam |1.2.2a|ii|| | 1 |
| Front Front shock absorber seal failed and leaking oil |2.3.3| | 1 |
| Front Floor brake test indicates a sticking brake |3.3.C2c| | 1 |
| Offside Upper Rear suspension bush has excessive free play |2.4.A2a|i|| | 1 |
| Rear Brake rod excessively chafed |3.2.A1a| | 1 |
| Nearside Direction indicators affected by the operation of another lamp |1.5.1c| | 1 |
| Offside Direction indicators affected by the operation of another lamp |1.5.1c| | 1 |
| Floor brake test The less effective brake control does not achieve an efficiency of 25%. |3.3.C1b| | 1 |
| Front Steering headbearing has excessive free play |2.2.2| | 1 |
| Offside Front Footrest insecure |6.2.1a| | 1 |
| Offside Front Locking devices not correctly fitted which may make the motor bicycle dangerous to ride |6.2.1h| | 1 |
| Rear wheel spindle securing nut locking device missing |2.4.A.2b| | 1 |
| Rear Wheel spoke excessively loose |4.2.1b| | 1 |
| Rear Brake locking device missing |3.2.A1e| | 1 |
| Front Brake lever has inadequate reserve travel |3.1.3b| | 1 |
| Direction indicator affected by the operation of another lamp also hardly visible when flashing |1.5.1c| | 1 |
| Front mudguard insecure stay coroded off |2.3.7| | 1 |
| Horn control defective |1.7.2a| | 1 |
| Direction indicators flashing less than 60 times a minute |1.5.1c| | 1 |
| Steering headbearing excessively stiff or notchy (2.2.2 (f) (i)) | 1 |
| Nearside Rear Direction indicator adversely affected by the operation of another lamp not working with lights on (4.4.3 (b)) | 1 |
| Offside Rear Direction indicator adversely affected by the operation of another lamp not working with lights on (4.4.3 (b)) | 1 |
| Front Direction indicator not working |1.5.1c| | 1 |
| Rear Direction indicator not working |1.5.1c| | 1 |
| Headlamp main beam affected by the operation of another lamp |1.2.2c| | 1 |