| Most common failures | No# failures |
|---|
| Headlamp aim out of alignment | 23 |
| Horn not working |1.7.3a| | 10 |
| Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 9 |
| Rear position lamp does not illuminate immediately when it is switched on |1.1.3a| | 6 |
| Registration plate issues | 6 |
| Rear Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 5 |
| Horn not loud enough to be heard by another road user |1.7.3a| | 4 |
| Headlamp insecure |1.2.3b| | 4 |
| Nearside Front Direction indicators not working |1.5.1c| | 3 |
| Offside Front Direction indicators not working |1.5.1c| | 3 |
| Nearside Rear Direction indicators not working |1.5.1c| | 3 |
| Offside Rear Direction indicators not working |1.5.1c| | 3 |
| Steering headbearing has excessive free play |2.2.2| | 3 |
| Nearside Rear Direction indicator insecure |1.5.3b| | 3 |
| Front position lamp does not illuminate immediately when switched on |1.1.3a| | 3 |
| Headlamp at least one does not illuminate on main beam |1.2.2a|ii|| | 3 |
| Rear wheel spindle securing nut locking device missing |2.4.A.2b| | 3 |
| Front Horn not working |1.7.3a| | 3 |
| Direction indicators flashing less than 60 times a minute |1.5.1c| | 3 |
| Headlamp dipped beam affected by the operation of another lamp |1.2.2c| | 2 |
| Headlamp main beam affected by the operation of another lamp |1.2.2c| | 2 |
| Front Steering lock stop missing |2.1.3| | 2 |
| Wheel alignment incorrect which adversely affects the steering |2.5.1| | 2 |
| Front Front position lamp does not illuminate immediately when switched on |1.1.3a| | 2 |
| Direction indicator flashing less than 60 times a minute |1.5.1c| | 2 |
| Rear Wheel spoke excessively loose |4.2.1b| | 2 |
| Front Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 2 |
| Offside Rear Direction indicator insecure |1.5.3b| | 2 |
| Rear Brake locking device missing |3.2.A1e| | 2 |
| Rear Footrest missing |6.2.1a| | 2 |
| Front Roller brake test indicates a binding brake |3.3.A1a| | 2 |
| Nearside Front Direction indicator flashing less than 60 times a minute |1.5.1c| | 2 |
| Nearside Rear Direction indicator flashing less than 60 times a minute |1.5.1c| | 2 |
| Brake lever has inadequate reserve travel |3.1.3b| | 2 |
| Front Brake lining|s| less than 1.5 mm thick |3.2.A1f|i|| | 2 |
| Drive chain excessively loose |6.2.1d| | 2 |
| Direction indicators not working |1.5.1c| | 2 |
| Throttle operating incorrectly |6.2.1f| | 2 |
| Locking device|s| not correctly fitted which may make the motor bicycle dangerous to ride |6.2.1h| | 2 |
| Rear Brake pedal has inadequate reserve travel |3.1.3b| | 2 |
| Direction indicator not working |1.5.1c| | 2 |
| Wheel alignment incorrect which adversely affects the handling |2.5.1| | 2 |
| Rear Rear reflector on motorcycle missing |1.4.1| | 2 |
| Rear Rear shock absorber has inadequate damping effect. |2.4.A.3b| | 2 |
| Front Steering movement excessively `notchy` with the wheel raised |2.2.1b| | 2 |
| Rear Rear position lamp does not illuminate immediately when it is switched on |1.1.3a| | 2 |
| Direction indicators affected by the operation of another lamp |1.5.1c| | 2 |
| Nearside Rear Direction indicator affected by the operation of another lamp |1.5.1c| | 1 |
| Offside Rear Direction indicator affected by the operation of another lamp |1.5.1c| | 1 |
| Rear position lamp adversely affected by the operation of another lamp |1.1.3b| | 1 |
| Fuel tank leaking |7.2.1a| | 1 |
| Rear reflector on motorcycle missing |1.4.1| | 1 |
| Offside Motorcycle structure cracked |6.1.1a| | 1 |
| Rear suspension fouling which affects the movement of the rear suspension |2.4.A.3a| | 1 |
| Offside Rear shock absorber insecurely mounted |2.4.A.3b| | 1 |
| Rear Direction indicators not working |1.5.1c| | 1 |
| Rear Stop lamp does not emit a steady light |1.3.1b| | 1 |
| Front Direction indicators not working |1.5.1c| | 1 |
| Front Front wheel spindle securing nut locking device missing |2.3.3a| | 1 |
| Rear Roller brake test indicates a sticking brake |3.3.A1a| | 1 |
| Rear Brake pedal pivots excessively worn |3.1.3a| | 1 |
| Fuel system component leaking |7.2.1a| | 1 |
| Exhaust mounting does not fully support the exhaust system |7.1.1.c| | 1 |
| Headlamp aim headlamp damaged and function impaired |1.2.3a| | 1 |
| Horn replaced by a gong |1.7.3b| | 1 |
| Nearside Handlebar handgrip not secure to handlebars. |2.1.1c| | 1 |
| Front wheel spindle loose |2.3.3a| | 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 |
| Front Roller brake test indicates brake effort rise disproportional to brake lever or pedal effort |3.3.A1c| | 1 |
| Roller brake test No brake control achieves an efficiency of 30%. |3.3.A2a| | 1 |
| Nearside Front Direction indicator not working |1.5.1c| | 1 |
| Front wheel spindle securing nut|s| loose |2.3.5a| | 1 |
| Front wheel spindle securing nut locking device insecure |2.3.5a| | 1 |
| Front wheel spindle loose |2.3.5a| | 1 |
| Steering movement excessively rough with the weight on the lower bearing |2.2.1a| | 1 |
| Rear position lamp insecure |1.1.1c| | 1 |
| Stop lamp obscured |1.3.1c| | 1 |
| Centre Rear Locking devices not correctly fitted which may make the motor bicycle dangerous to ride |6.2.1h| | 1 |
| Offside Rear Rear shock absorber has inadequate damping effect. |2.4.A.3b| | 1 |
| Nearside Rear Rear shock absorber has inadequate damping effect. |2.4.A.3b| | 1 |
| Offside Rear Rear shock absorber insecurely mounted |2.4.A.3b| | 1 |
| Nearside Front suspension assembly excessive wear or free play in a front suspension component |2.3.4| | 1 |
| Front mudguard insecure |2.3.7| | 1 |
| Front wheel bearings have excessive free play |2.3.5b| | 1 |
| Rear wheel rotation likely to be impeded |6.2.1b| | 1 |
| Rear Direction indicator flashing less than 60 times a minute |1.5.1c| | 1 |
| Nearside Rear shock absorber seal failed and leaking oil |2.4.A.1c| | 1 |
| Front Headlamp insecure |1.2.3b| | 1 |
| Front Brake lever cannot be released smoothly |3.1.3d| | 1 |
| Front suspension assembly component cracked |2.3.1| | 1 |
| Rear Direction indicators flashing less than 60 times a minute |1.5.1c| | 1 |
| Front Brake lining(s) less than 1.0 mm thick (1.1.13 (a)) | 1 |
| Inner Rear Lower Exhaust is leaking and excessively noisey |7.1.1b| | 1 |
| Nearside Front Handlebar handgrip not secure to handlebars. |2.1.1c| | 1 |
| Rear Brake lining|s| less than 1.5 mm thick |3.2.A1f|i|| | 1 |
| Steering headbearing excessively stiff or notchy (2.2.2 (f) (i)) | 1 |
| Front Brake lever has insufficient reserve travel (1.1.2 (a)) | 1 |
| Offside Rear Footrest insecure (6.2.12 (a)) | 1 |
| Direction indicators flashing more than 120 times per minute |1.5.1c| | 1 |
| Centre Rear Rear reflector on motorcycle missing |1.4.1| | 1 |
| Offside All direction indicators not working |4.4.1 |a| |ii|| | 1 |
| Rear Riders seat insecure |6.2.5 |a| |ii|| | 1 |
| Front Brake lever has inadequate reserve travel |3.1.3b| | 1 |
| Rear Brake lever has inadequate reserve travel |3.1.3b| | 1 |
| Roller brake test The less effective brake control does not achieve an efficiency of 25%. |3.3.A2b| | 1 |
| Floor brake test The less effective brake control does not achieve an efficiency of 25%. |3.3.C1b| | 1 |
| Outer Direction indicator not working |1.5.1c| | 1 |
| Offside Rear Footrest insecure |6.2.1a| | 1 |
| Front Upper All position lamps adversely affected by the operation of another lamp |1.1.3b| | 1 |
| Rear Upper All position lamps adversely affected by the operation of another lamp |1.1.3b| | 1 |
| Front Upper 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 |
| Fuel cap does not fasten securely maintaining the sealing arrangement |7.2.2b| | 1 |
| Front Roller brake test indicates a sticking brake |3.3.A1a| | 1 |
| Offside Rear Brake locking device missing |3.2.A1e| | 1 |
| Offside Front Direction indicator insecure |1.5.3b| | 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 |
| Nearside Front suspension has inadequate damping effect. |2.3.6c| | 1 |
| Offside Front suspension has inadequate damping effect. |2.3.6c| | 1 |
| Nearside Rear Footrest missing |6.2.1a| | 1 |
| Offside Rear Footrest missing |6.2.1a| | 1 |
| Headlamp at least one does not illuminate on dipped beam |1.2.2a|i|| | 1 |
| All position lamps do not illuminate immediately when switched on |1.1.3a| | 1 |
| Offside Front Horn not loud enough to be heard by another road user |1.7.3a| | 1 |
| Brake locking device insecure |3.2.A1e| | 1 |
| Centre Rear Rear position lamp does not illuminate immediately when it is switched on |1.1.3a| | 1 |
| Nearside Rear Drive chain excessively tight |6.2.1d| | 1 |
| Offside Front Front wheel has a loose wheel nut|s| |4.2.3a| | 1 |
| Rear Brake reaction bracket insecure |3.2.A1j| | 1 |
| Brake pedal has inadequate reserve travel |3.1.3b| | 1 |
| Offside Front Direction indicator flashing less than 60 times a minute |1.5.1c| | 1 |
| Offside Rear Direction indicator flashing less than 60 times a minute |1.5.1c| | 1 |
| Brake pedal pivots excessively worn |3.1.3a| | 1 |
| Locking devices not correctly fitted which may make the motor bicycle dangerous to ride |6.2.1h| | 1 |
| Stop lamp affected by the operation of another lamp |1.3.2| | 1 |
| Footrest insecure |6.2.1a| | 1 |
| Rear Locking devices not correctly fitted which may make the motor bicycle dangerous to ride |6.2.1h| | 1 |
| Front Upper Headlamp at least one does not illuminate on dipped beam |1.2.2a|i|| | 1 |
| Rear Upper Direction indicator not working |1.5.1c| | 1 |
| Front Upper Direction indicator not working |1.5.1c| | 1 |
| Front Horn control defective |1.7.2a| | 1 |
| Front Wheel spoke cracked. |4.2.1b| | 1 |
| Nearside Indicator switch does not operate the direction indicators on the side selected |1.5.4| | 1 |
| Rear Brake locking device insecure |3.2.A1e| | 1 |
| Offside Rear Direction indicator deteriorated and function impaired |1.5.3a| | 1 |
| Rear position lamp deteriorated and function impaired |1.1.1b| | 1 |
| Stop lamp deteriorated and function impaired |1.3.3a| | 1 |
| Motorcycle structure insecure and likely to affect the correct functioning of the steering or braking |6.1.1c| | 1 |
| Horn control not functioning. |1.7.2b| | 1 |