| Most common failures | No# failures |
|---|
| Headlamp aim out of alignment | 21 |
| Rear position lamp does not illuminate immediately when it is switched on |1.1.3a| | 13 |
| Registration plate issues | 12 |
| Direction indicators not working |1.5.1c| | 9 |
| Headlamp at least one does not illuminate on dipped beam |1.2.2a|i|| | 8 |
| Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 7 |
| Stop lamp affected by the operation of another lamp |1.3.2| | 6 |
| Horn not working |1.7.3a| | 6 |
| Front position lamp does not illuminate immediately when switched on |1.1.3a| | 5 |
| Front Headlamp at least one does not illuminate on dipped beam |1.2.2a|i|| | 5 |
| Horn not loud enough to be heard by another road user |1.7.3a| | 5 |
| Front suspension assembly excessive wear or free play in a front suspension component |2.3.4| | 5 |
| Rear Rear position lamp does not illuminate immediately when it is switched on |1.1.3a| | 4 |
| Rear wheel spindle securing nut locking device missing |2.4.A.2b| | 4 |
| Rear Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 4 |
| Roller brake test The less effective brake control does not achieve an efficiency of 25%. |3.3.A2b| | 4 |
| Headlamp at least one does not illuminate on main beam |1.2.2a|ii|| | 4 |
| Front wheel spindle securing nut locking device missing |2.3.3a| | 3 |
| Drive chain worn to excess |6.2.1e| | 3 |
| Front Roller brake test indicates brake effort fall disproportional to brake lever or pedal effort |3.3.A1c| | 3 |
| Front Headlamp at least one does not illuminate on main beam |1.2.2a|ii|| | 3 |
| Fuel system component leaking |7.2.1a| | 3 |
| Rear Drive chain sprocket worn to excess |6.2.1e| | 2 |
| Nearside Rear Motorcycle structure excessively corroded |6.1.1a| | 2 |
| Nearside Rear Direction indicator not working |1.5.1c| | 2 |
| Rear suspension bush has excessive free play |2.4.A2a|i|| | 2 |
| Front Front suspension assembly has excessive free play in the pivot bearings. |2.3.2| | 2 |
| Rear reflector missing (4.8.2 (a) (ii)) | 2 |
| Offside Front suspension assembly excessive wear or free play in a front suspension component |2.3.4| | 2 |
| Rear position lamp adversely affected by the operation of another lamp |1.1.3b| | 2 |
| Headlamp dipped beam affected by the operation of another lamp |1.2.2c| | 2 |
| Direction indicator affected by the operation of another lamp |1.5.1c| | 2 |
| Offside Rear Direction indicator not working |1.5.1c| | 2 |
| Rear Brake locking device insecure |3.2.A1e| | 2 |
| Exhaust is leaking and excessively noisey |7.1.1b| | 2 |
| Front Roller brake test indicates a binding brake |3.3.A1a| | 2 |
| Wheel alignment incorrect which adversely affects the handling |2.5.1| | 2 |
| Direction indicators flashing less than 60 times a minute |1.5.1c| | 2 |
| Locking devices not correctly fitted which may make the motor bicycle dangerous to ride |6.2.1h| | 2 |
| Front Roller brake test indicates a sticking brake |3.3.A1a| | 2 |
| Front Brake lever has inadequate reserve travel |3.1.3b| | 2 |
| Rear Brake pedal has inadequate reserve travel |3.1.3b| | 2 |
| Headlamp aim not tested |1.6| | 2 |
| Front Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 2 |
| Rear Wheel spoke excessively loose |4.2.1b| | 2 |
| Rear Position lamp not working (4.2.1 (a)) | 2 |
| Motorcycle structure cracked |6.1.1a| | 1 |
| Rear Brake back plate|s| securing bolt|s| loose |3.2.A1j| | 1 |
| Offside Rear Direction indicators not working |1.5.1c| | 1 |
| Front Drive chain sprocket worn to excess |6.2.1e| | 1 |
| Drive chain sprocket carrier worn to excess |6.2.1e| | 1 |
| Offside Front Front suspension assembly excessive wear or free play in a front suspension component |2.3.4| | 1 |
| Rear Brake pedal cannot be applied smoothly |3.1.3d| | 1 |
| Front Wheel alignment incorrect which adversely affects the handling |2.5.1| | 1 |
| Rear Wheel alignment incorrect which adversely affects the steering |2.5.1| | 1 |
| Lower Front suspension assembly has excessive free play in the pivot bearings. |2.3.2| | 1 |
| Nearside Rear Drive chain excessively loose |6.2.1d| | 1 |
| Front Headlamp dipped beam affected by the operation of another lamp |1.2.2c| | 1 |
| Motorcycle structure excessively corroded |6.1.1a| | 1 |
| Locking device|s| not correctly fitted which may make the motor bicycle dangerous to ride |6.2.1h| | 1 |
| Rear Wheel has an excessively eccentric bead rim. |4.2.2| | 1 |
| Front Wheel has an excessively distorted bead rim. |4.2.2| | 1 |
| Rear Wheel has an excessively distorted bead rim. |4.2.2| | 1 |
| Front position lamp adversely affected by the operation of the horn |1.1.3b| | 1 |
| Front position lamp adversely affected by the operation of another lamp |1.1.3b| | 1 |
| Rear position lamp adversely affected by the operation of the horn |1.1.3b| | 1 |
| Headlamp dipped beam affected by the operation of the horn |1.2.2c| | 1 |
| Headlamp main beam affected by the operation of another lamp |1.2.2c| | 1 |
| Headlamp main beam affected by the operation of the horn |1.2.2c| | 1 |
| Stop lamp affected by the operation of the horn |1.3.2| | 1 |
| Direction indicator flashing less than 60 times a minute |1.5.1c| | 1 |
| Horn is not continous or uniform |1.7.3c| | 1 |
| Front Wheel spindle locking device missing (5.2.1 (d)) | 1 |
| Rear Wheel spindle locking device missing (5.2.1 (d)) | 1 |
| Nearside Front Brake cable excessively corroded |3.2.A1b| | 1 |
| Nearside Upper Direction indicators not working |1.5.1c| | 1 |
| Offside Upper Direction indicators not working |1.5.1c| | 1 |
| Centre Rear Stop lamp remains on when the brake is released |1.3.1e| | 1 |
| Front Front wheel spindle securing nut locking device missing |2.3.3a| | 1 |
| Fuel cap sealing washer deteriorated |7.2.2c| | 1 |
| Nearside Front Direction indicators not working |1.5.1c| | 1 |
| Offside Rear Brake pedal has inadequate reserve travel |3.1.3b| | 1 |
| Offside Rear Locking devices not correctly fitted which may make the motor bicycle dangerous to ride |6.2.1h| | 1 |
| Nearside Rear Wheel alignment incorrect which adversely affects the handling |2.5.1| | 1 |
| Centre Front Dipswitch does not deflect the main beam/s, making them into dipped beam/s |1.2.2b|ii|| | 1 |
| Outer Front Direction indicators flashing more than 120 times per minute |1.5.1c| | 1 |
| Centre Front Front suspension assembly excessive wear or free play in a front suspension component |2.3.4| | 1 |
| Inner Front Horn not working |1.7.3a| | 1 |
| Centre Front Wheel alignment incorrect which adversely affects the handling |2.5.1| | 1 |
| Centre Front Front suspension assembly component loose |2.3.1| | 1 |
| Inner Front Wheel spoke excessively loose |4.2.1b| | 1 |
| Outer Front Locking devices not correctly fitted which may make the motor bicycle dangerous to ride |6.2.1h| | 1 |
| Central Front Lower Steering headbearing has excessive wear or free play (2.2.2 (f) (i)) | 1 |
| Stop lamp remains on when the brake is released |1.3.1e| | 1 |
| Front suspension assembly has excessive free play in the pivot bearings. |2.3.2| | 1 |
| Throttle has a significant change in engine speed whilst moving the steering from lock to lock |2.1.4| | 1 |
| Nearside Footrest insecure |6.2.1a| | 1 |
| Drive chain excessively tight |6.2.1d| | 1 |
| Direction indicators affected by the operation of another lamp |1.5.1c| | 1 |
| Rear Brake reaction bracket insecure |3.2.A1j| | 1 |
| Rear Rear reflector missing (4.8.2 (a) (ii)) | 1 |
| Offside Horn sound not in accordance with requirements barley audible (7.7 (c)) | 1 |
| Front Horn is not continous or uniform |1.7.3c| | 1 |
| Rear Rear wheel spindle securing nut locking device missing |2.4.A.2b| | 1 |
| Headlamp not working on dipped beam (4.1.1 (a) (ii)) | 1 |
| Rear Wheel fixing missing (single fixing) rear wheel spindle split pin missing (5.2.1 (a) (ii)) | 1 |
| Direction indicator not working |1.5.1c| | 1 |
| Rear Roller brake test indicates a binding brake |3.3.A1a| | 1 |
| Rear Brake pedal is positioned so that the brake cannot be readily applied |3.1.3c| | 1 |
| Front Brake pedal has inadequate reserve travel |3.1.3b| | 1 |
| Rear Rear wheel bearings have excessive free play |2.4.A.2c| | 1 |
| Fuel cap does not fasten securely maintaining the sealing arrangement |7.2.2b| | 1 |
| Wheel alignment incorrect which adversely affects the steering |2.5.1| | 1 |
| Front Steering linkage has excessive free play |2.2.2| | 1 |
| Rear Roller brake test indicates a sticking brake |3.3.A1a| | 1 |
| Rear Front wheel spindle securing nut locking device missing |2.3.3a| | 1 |
| Throttle operating incorrectly |6.2.1f| | 1 |
| Front Upper Steering movement excessively stiff with the wheel raised |2.2.1b| | 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 |
| Rear Brake component has restricted free movement and operation is likely to be impeded |3.2.A1h| | 1 |
| Front Locking devices not correctly fitted which may make the motor bicycle dangerous to ride |6.2.1h| | 1 |
| Rear Locking devices not correctly fitted which may make the motor bicycle dangerous to ride |6.2.1h| | 1 |
| Front position lamp missing |1.1.1a| | 1 |
| Nearside Rear suspension has corrosion which reduces the strength of a load bearing member or its supporting structure. |2.4.A.2d| | 1 |
| Offside Rear suspension has corrosion which reduces the strength of a load bearing member or its supporting structure. |2.4.A.2d| | 1 |
| Rear wheel spindle securing nut locking device insecure |2.4.A.2b| | 1 |
| Direction indicators not working all |1.5.1c| | 1 |
| Stop lamp not working (4.3.1 (a) (ii)) | 1 |
| Nearside Handlebar grip insecure to handlebar (2.2.1 (d) (ii)) | 1 |
| Offside Front Brake lever has insufficient reserve travel (1.1.2 (a)) | 1 |
| Brake pedal has insufficient reserve travel (1.1.2 (a)) | 1 |
| Riders seat insecure |6.2.1a| | 1 |
| Front suspension has inadequate damping effect. |2.3.6c| | 1 |
| Front Leg shield insecure and likely to impede the steering |2.1.2e| | 1 |
| Rear Motorcycle structure cracked |6.1.1a| | 1 |
| Nearside Front Front suspension has excessive corrosion which reduces the strength of a load bearing member or its supporting structure. |2.3.8| | 1 |
| Offside Rear Front suspension has excessive corrosion which reduces the strength of a load bearing member or its supporting structure. |2.3.8| | 1 |
| Horn missing |1.7.1| | 1 |
| Front Headlamp not working on dipped beam |4.1.1 |a| |ii|| | 1 |
| Nearside Rear Rear shock absorber insecurely mounted |2.4.A.3b| | 1 |
| Front wheel bearings have excessive free play |2.3.5b| | 1 |
| Offside Front Brake lever has inadequate reserve travel |3.1.3b| | 1 |
| Riders seat insecure (6.2.5 (a) (ii)) | 1 |
| Nearside Direction indicator flashing less than 60 times a minute |1.5.1c| | 1 |
| Nearside Rear Rear suspension has corrosion which reduces the strength of a load bearing member or its supporting structure. |2.4.A.2d| | 1 |
| All position lamps adversely affected by the operation of another lamp |1.1.3b| | 1 |
| Front Front position lamp does not illuminate immediately when switched on |1.1.3a| | 1 |
| Rear Front position lamp does not illuminate immediately when switched on |1.1.3a| | 1 |
| Centre Front Upper Front position lamp does not illuminate immediately when switched on |1.1.3a| | 1 |
| Rear reflector on motorcycle missing |1.4.1| | 1 |
| Nearside Rear suspension component excessively corroded. |2.4.A.1a| | 1 |
| Nearside Front suspension assembly excessive wear or free play in a front suspension component |2.3.4| | 1 |
| Rear Suspension arm corroded and seriously weakened (5.3.3 (b) (i)) | 1 |
| Footrest insecure |6.2.1a| | 1 |
| Front Steering control handlebar movement restricted by trapped cables |2.1.2c| | 1 |
| Front Footrest insecure |6.2.1a| | 1 |
| Front Motorcycle structure excessively distorted |6.1.1a| | 1 |
| Front suspension assembly component excessively misaligned |2.3.1| | 1 |
| Drive chain excessively loose |6.2.1d| | 1 |
| Steering headbearing has excessive free play |2.2.2| | 1 |
| Rear Direction indicator obscured |1.5.1a| | 1 |
| Steering headbearing has excessive wear or free play (2.2.2 (f) (i)) | 1 |
| Rear Brake pedal pivot has excessive free play (1.1.1 (b)) | 1 |
| Nearside Rear Drive chain horseshoe locking device incorrectly fitted (6.1.7 (j) (i)) | 1 |
| Nearside Rear Suspension attachment bracket/mounting insecure swingarm not tight and no locking device on spindle (5.3.3 (a) (i)) | 1 |
| Rear Drive chain sprocket carrier worn to excess excess play in cush drive |6.2.1e| | 1 |
| Front Front position lamp flickers when tapped lightly by hand |1.1.3c| | 1 |
| Steering control handlebar movement restricted by trapped cables |2.1.2c| | 1 |
| Rear Brake locking device missing |3.2.A1e| | 1 |
| Headlamp switch faulty |1.2.4| | 1 |
| Nearside Direction indicators not working |1.5.1c| | 1 |
| Offside Front Direction indicators not working |1.5.1c| | 1 |
| Offside Front Upper Front suspension assembly has excessive free play in the pivot bearings. |2.3.2| | 1 |
| Front Wheel spoke excessively corroded |4.2.1b| | 1 |
| Rear Wheel spoke excessively corroded |4.2.1b| | 1 |
| Nearside Front Brake lever mounting insecure |3.1.2a| | 1 |
| Offside Front Brake lever mounting insecure |3.1.2a| | 1 |
| Nearside Front suspension has excessive corrosion which reduces the strength of a load bearing member or its supporting structure. |2.3.8| | 1 |
| Front suspension assembly component loose |2.3.1| | 1 |