| Most common failures | No# failures |
|---|
| Headlamp aim out of alignment | 19 |
| Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 10 |
| Headlamp at least one does not illuminate on dipped beam |1.2.2a|i|| | 8 |
| Front wheel spindle securing nut locking device missing |2.3.3a| | 7 |
| Rear Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 6 |
| Registration plate issues | 5 |
| Wheel alignment incorrect which adversely affects the handling |2.5.1| | 5 |
| Stop lamp affected by the operation of another lamp |1.3.2| | 5 |
| Steering headbearing has excessive free play |2.2.2| | 5 |
| Front position lamp does not illuminate immediately when switched on |1.1.3a| | 5 |
| Drive chain excessively tight |6.2.1d| | 4 |
| Headlamp at least one does not illuminate on main beam |1.2.2a|ii|| | 4 |
| Exhaust is leaking and excessively noisey |7.1.1b| | 4 |
| Rear wheel spindle securing nut locking device missing |2.4.A.2b| | 4 |
| Fuel system component leaking |7.2.1a| | 4 |
| Rear shock absorber has inadequate damping effect. |2.4.A.3b| | 4 |
| Drive chain excessively loose |6.2.1d| | 4 |
| Front Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 4 |
| Direction indicators affected by the operation of another lamp |1.5.1c| | 4 |
| Drive chain worn to excess |6.2.1e| | 4 |
| Rear Drive chain sprocket worn to excess |6.2.1e| | 4 |
| Rear Brake pedal has inadequate reserve travel |3.1.3b| | 4 |
| Rear position lamp adversely affected by the operation of another lamp |1.1.3b| | 4 |
| Fuel system component insecure |7.2.1b| | 3 |
| Horn not loud enough to be heard by another road user |1.7.3a| | 3 |
| Headlamp not working on dipped beam |4.1.1 |a| |ii|| | 3 |
| Front Front wheel bearings are excessively rough |2.3.5b| | 3 |
| Horn not working |1.7.3a| | 3 |
| Nearside Handlebar handgrip not secure to handlebars. |2.1.1c| | 3 |
| Headlamp main beam affected by the operation of another lamp |1.2.2c| | 3 |
| Front Brake lever has inadequate reserve travel |3.1.3b| | 3 |
| Front Front wheel bearings have excessive free play |2.3.5b| | 3 |
| Wheel alignment incorrect which adversely affects the steering |2.5.1| | 2 |
| Front Exhaust is leaking and excessively noisey |7.1.1b| | 2 |
| Stop lamp not working (4.3.1 (a) (ii)) | 2 |
| Riders seat insecure |6.2.1a| | 2 |
| Front Footrest insecure |6.2.1a| | 2 |
| Roller brake test The less effective brake control does not achieve an efficiency of 25%. |3.3.A2b| | 2 |
| Nearside Rear Footrest missing |6.2.1a| | 2 |
| Steering control fouling between components which interferes with the free movement of the steering |2.1.2a| | 2 |
| Rear Brake back plate|s| securing bolt|s| loose |3.2.A1j| | 2 |
| Direction indicators not working |1.5.1c| | 2 |
| Rear Direction indicator affected by the operation of another lamp |1.5.1c| | 2 |
| Front Direction indicator affected by the operation of another lamp |1.5.1c| | 2 |
| Front wheel bearings have excessive free play |2.3.5b| | 2 |
| Rear Brake reaction bracket insecure |3.2.A1j| | 2 |
| Headlamp not working on main beam (4.1.1 (a) (ii)) | 2 |
| Offside Direction indicator flashing less than 60 times a minute |1.5.1c| | 2 |
| Rear position lamp does not illuminate immediately when it is switched on |1.1.3a| | 2 |
| Direction indicators flashing more than 120 times per minute |1.5.1c| | 2 |
| Headlamp dipped beam affected by the operation of another lamp |1.2.2c| | 2 |
| Front Drive chain sprocket worn to excess |6.2.1e| | 2 |
| Front Stop lamp not working (4.3.1 (a) (ii)) | 2 |
| Motorcycle structure excessively corroded |6.1.1a| | 2 |
| Front Roller brake test indicates a binding brake |3.3.A1a| | 2 |
| Exhaust excessively deteriorated |7.1.1a| | 1 |
| Locking devices not correctly fitted which may make the motor bicycle dangerous to ride |6.2.1h| | 1 |
| Front Headlamp dipped beam affected by the operation of another lamp |1.2.2c| | 1 |
| Direction indicator affected by the operation of another lamp |1.5.1c| | 1 |
| Nearside Front Direction indicators flashing less than 60 times a minute |1.5.1c| | 1 |
| Offside Front Direction indicators flashing less than 60 times a minute |1.5.1c| | 1 |
| Nearside Rear Direction indicators flashing less than 60 times a minute |1.5.1c| | 1 |
| Offside Rear Direction indicators flashing less than 60 times a minute |1.5.1c| | 1 |
| Rear Brake locking device missing |3.2.A1e| | 1 |
| Rear Rear suspension component excessively corroded. |2.4.A.1a| | 1 |
| Front Front wheel insecure |4.2.3b| | 1 |
| Nearside Front Direction indicators not working |1.5.1c| | 1 |
| Headlamp insecure |1.2.3b| | 1 |
| Direction indicators flashing less than 60 times a minute |1.5.1c| | 1 |
| Front mudguard can easily contact any fixed point of the motor bicycle. |2.3.7| | 1 |
| Front Direction indicator not working |4.4.1 |a| |ii|| | 1 |
| Steering headbearing excessively stiff or notchy |2.2.2 |f| |i|| | 1 |
| Offside Front Direction indicators not working |1.5.1c| | 1 |
| Front Front wheel spindle securing nut locking device missing |2.3.5a| | 1 |
| Offside Front Direction indicator not working |1.5.1c| | 1 |
| Headlamp dipped beam flickers when tapped lightly by hand |1.2.2c| | 1 |
| Nearside Rear Direction indicators not working |1.5.1c| | 1 |
| Front wheel has a loose wheel nut|s| |4.2.3a| | 1 |
| Nearside Direction indicator not working |1.5.1c| | 1 |
| Offside Direction indicator not working |1.5.1c| | 1 |
| Steering movement excessively `notchy` with the weight on the lower bearing |2.2.1a| | 1 |
| Direction indicator flashing more than 120 times per minute |1.5.1c| | 1 |
| Nearside Front Direction indicator not working |4.4.1 |a| |ii|| | 1 |
| Dipswitch does not extinquish main beam/s, leaving at least 1 dipped beam headlamp |1.2.2b|i|| | 1 |
| Front Stop lamp missing |1.3.3a| | 1 |
| Nearside Direction indicator affected by the operation of another lamp |1.5.1c| | 1 |
| Rear Roller brake test indicates a sticking brake |3.3.A1a| | 1 |
| Front wheel spindle securing nut|s| loose |2.3.3a| | 1 |
| Indicator switch defective |1.5.4| | 1 |
| Rear Brake pedal pivots excessively worn |3.1.3a| | 1 |
| Suspension arm insecurely attached |5.3.3 |a| |i|| | 1 |
| Offside Rear Footrest missing |6.2.1a| | 1 |
| Rear Footrest missing |6.2.1a| | 1 |
| Rear wheel rotation likely to be impeded |6.2.1b| | 1 |
| Nearside Handlebar mounting clamp bolt loose |2.1.1a| | 1 |
| Fuel tank leaking |7.2.1a| | 1 |
| Handlebar deformed |2.1.1b| | 1 |
| Front Brake lever cannot be applied smoothly |3.1.3d| | 1 |
| Nearside Front Footrest insecure |6.2.1a| | 1 |
| Front Horn is not continous or uniform |1.7.3c| | 1 |
| Front Headlamp insecure |1.2.3b| | 1 |
| Rear Rear position lamp does not illuminate immediately when it is switched on |1.1.3a| | 1 |
| Fuel pipe union leaking |7.2.1a| | 1 |
| Rear Rear suspension component loose |2.4.A.1a| | 1 |
| Stop lamp remains on when the brake is released |1.3.1e| | 1 |
| Nearside Rear Exhaust is leaking and excessively noisey |7.1.1b| | 1 |
| Offside Rear Exhaust is leaking and excessively noisey |7.1.1b| | 1 |
| Centre Front Front position lamp does not illuminate immediately when switched on |1.1.3a| | 1 |
| Centre Front Headlamp aim not tested |1.6| | 1 |
| Rear Brake pedal is positioned so that the brake cannot be readily applied |3.1.3c| | 1 |
| Rear Brake pedal cannot be applied smoothly |3.1.3d| | 1 |
| Brake reaction bracket insecure |3.2.A1j| | 1 |
| Front Horn not loud enough to be heard by another road user |1.7.3a| | 1 |
| Front Stop lamp remains on when the brake is released |1.3.1e| | 1 |
| Brake pedal is inoperative |3.1.3c| | 1 |
| Rear Motorcycle structure excessively damaged |6.1.1a| | 1 |
| All position lamps adversely affected by the operation of the horn |1.1.3b| | 1 |
| Headlamp aim not tested |1.6| | 1 |
| Rear Rear wheel bearings have excessive free play |2.4.A.2c| | 1 |
| Brake pedal insecure |3.1.2a| | 1 |
| Brake locking device missing |3.2.A1e| | 1 |
| Nearside Front Direction indicator not working (4.4.1 (a) (ii)) | 1 |
| Horn not working (7.7 (a) (ii)) | 1 |
| Headlamp not working on dipped beam (4.1.1 (a) (ii)) | 1 |
| Nearside Front Direction indicator not working |1.5.1c| | 1 |
| Nearside Rear Direction indicator flashing less than 60 times a minute |1.5.1c| | 1 |
| Rear Brake back plate|s| insecure |3.2.A1j| | 1 |
| Fuel cap does not fasten securely maintaining the sealing arrangement |7.2.2b| | 1 |
| Brake pedal cannot be applied smoothly |3.1.3d| | 1 |
| Rear wheel spindle securing nut locking device insecure |2.4.A.2b| | 1 |
| Steering movement excessively stiff with the wheel raised |2.2.1b| | 1 |
| Offside Rear Brake back plate|s| securing bolt|s| loose |3.2.A1j| | 1 |
| Front Rear wheel spindle securing nut locking device missing |2.4.A.2b| | 1 |
| Rear Rear wheel spindle securing nut locking device missing |2.4.A.2b| | 1 |
| Stop lamp not working |4.3.1 |a| |ii|| | 1 |
| Front wheel bearings are excessively rough |2.3.5b| | 1 |
| Front Brake component has restricted free movement and operation is likely to be impeded |3.2.A1h| | 1 |
| Front Brake component has an inadequate repair |3.1.5| | 1 |
| All position lamps do not illuminate immediately when switched on |1.1.3a| | 1 |
| Front Brake lever excessively worn (1.1.15 (b)) | 1 |
| Motorcycle structure joining/attachment plate or fastening insecure Front and rear axle nut split pins missing - replaced (6.1.1 (b) (i)) | 1 |
| Front Wheel spoke excessively loose |4.2.1b| | 1 |
| Nearside Rear Direction indicator not working |1.5.1c| | 1 |
| Rear Brake lining|s| less than 1.5 mm thick |3.2.A1f|i|| | 1 |
| Nearside Direction indicator flashing less than 60 times a minute |1.5.1c| | 1 |
| Rear Wheel alignment incorrect which adversely affects the handling |2.4 |a|| | 1 |
| Front position lamp adversely affected by the operation of another lamp |1.1.3b| | 1 |
| Front shock absorber seal failed and leaking oil |2.3.3| | 1 |
| Front Horn control not functioning. |1.7.2b| | 1 |
| Fuel cap mounting flange/sealing method defective |7.2.2c| | 1 |
| Rear Wheel spoke cracked. |4.2.1b| | 1 |
| Nearside Rear Footrest insecure |6.2.1a| | 1 |
| Rear wheel bearings have excessive free play |2.4.A.2c| | 1 |
| Nearside Rear Rear shock absorber has inadequate damping effect. |2.4.A.3b| | 1 |
| Offside Rear Rear shock absorber has inadequate damping effect. |2.4.A.3b| | 1 |
| Throttle has a significant change in engine speed whilst moving the steering from lock to lock |2.1.4| | 1 |
| Rear Rear wheel rotation likely to be impeded |6.2.1b| | 1 |
| Rear reflector missing |4.8.2 |a| |ii|| | 1 |
| Offside Rear Direction indicators not working |1.5.1c| | 1 |
| Brake pedal pivots excessively worn |3.1.3a| | 1 |
| Front Rear suspension bush has excessive free play |2.4.A2a|i|| | 1 |
| Front Brake excessively binding |1.2.1 |f|| | 1 |
| Stop lamp remains on when the brakes are released | 1 |
| All position lamps not working |4.2.1 |a|| | 1 |
| Front Roller brake test indicates a sticking brake |3.3.A1a| | 1 |
| Front Brake lever mounting insecure |3.1.2a| | 1 |
| Rear Position lamp not working (4.2.1 (a)) | 1 |
| Nearside Front wheel spindle securing nut locking device missing |2.3.5a| | 1 |
| Horn is not continous or uniform |1.7.3c| | 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 |
| Nearside Front shock absorber seal failed and leaking oil |2.3.3| | 1 |
| Nearside Exhaust excessively deteriorated |7.1.1a| | 1 |
| Front Direction indicators not working |1.5.1c| | 1 |
| Rear Direction indicators not working |1.5.1c| | 1 |
| Front Horn not working |1.7.3a| | 1 |
| Throttle operating incorrectly |6.2.1f| | 1 |
| Offside Rear Direction indicator incorrect colour |1.5.1b| | 1 |
| Nearside Rear Direction indicator incorrect colour |1.5.1b| | 1 |
| Rear position lamp insecure |1.1.1c| | 1 |
| Offside Rear Direction indicator not working |1.5.1c| | 1 |