| Most common failures | No# failures |
|---|
| Headlamp aim out of alignment | 11 |
| Rear reflector on motorcycle missing |1.4.1| | 11 |
| Rear suspension bush has excessive free play |2.4.A2a|i|| | 8 |
| Front Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 8 |
| Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 5 |
| Rear Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 5 |
| Nearside Front shock absorber seal failed and leaking oil |2.3.3| | 4 |
| Drive chain excessively loose |6.2.1d| | 4 |
| Roller brake test The less effective brake control does not achieve an efficiency of 25%. |3.3.A2b| | 4 |
| Front wheel bearings have excessive free play |2.3.5b| | 4 |
| Steering movement excessively `notchy` with the weight on the lower bearing |2.2.1a| | 3 |
| Rear mono-shock pivot excessively worn |2.4.B.4| | 3 |
| Steering movement excessively stiff with the wheel raised |2.2.1b| | 3 |
| Rear Drive chain sprocket worn to excess |6.2.1e| | 3 |
| Drive chain worn to excess |6.2.1e| | 3 |
| Rear suspension bearing has excessive free play |2.4.A2a|i|| | 3 |
| Rear Wheel has an excessively distorted bead rim. |4.2.2| | 3 |
| Brake lever has inadequate reserve travel |3.1.3b| | 3 |
| Headlamp at least one does not illuminate on dipped beam |1.2.2a|i|| | 2 |
| Rear position lamp does not illuminate immediately when it is switched on |1.1.3a| | 2 |
| Registration plate issues | 2 |
| Steering control fouling between components which interferes with the free movement of the steering |2.1.2a| | 2 |
| Front position lamp does not illuminate immediately when switched on |1.1.3a| | 2 |
| Headlamp aim beam image kick-up is to the offside |1.6.1| | 2 |
| Headlamp insecure |1.2.3b| | 2 |
| Front Headlamp at least one does not illuminate on dipped beam |1.2.2a|i|| | 2 |
| Rear Rear position lamp does not illuminate immediately when it is switched on |1.1.3a| | 2 |
| Horn not working |1.7.3a| | 2 |
| Rear Rear reflector on motorcycle missing |1.4.1| | 2 |
| Direction indicators affected by the operation of another lamp |1.5.1c| | 2 |
| Front Drive chain sprocket worn to excess |6.2.1e| | 2 |
| Horn not loud enough to be heard by another road user |1.7.3a| | 2 |
| Handlebar deformed |2.1.1b| | 2 |
| Headlamp main beam affected by the operation of another lamp |1.2.2c| | 2 |
| Rear wheel bearings have excessive free play |2.4.A.2c| | 2 |
| Front Roller brake test indicates a binding brake |3.3.A1a| | 2 |
| Rear Rear suspension bush has excessive free play |2.4.A2a|i|| | 2 |
| 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| | 2 |
| Direction indicator not working |1.5.1c| | 1 |
| Steering movement excessively `notchy` with the wheel raised |2.2.1b| | 1 |
| Steering movement excessively rough with the wheel raised |2.2.1b| | 1 |
| Throttle operating incorrectly |6.2.1f| | 1 |
| Front Roller brake test indicates a severely grabbing brake |3.3.A1b| | 1 |
| Offside Front shock absorber seal failed and leaking oil |2.3.3| | 1 |
| Rear Front position lamp does not illuminate immediately when switched on |1.1.3a| | 1 |
| Nearside Front Direction indicator not working |1.5.1c| | 1 |
| Nearside Rear Direction indicator not working |1.5.1c| | 1 |
| Front Brake lever is so short and the brake cannot be readily applied |3.1.3c| | 1 |
| Rear Brake fluid reservoir fluid level dangerously low |3.2.B1d| | 1 |
| Rear Brake fluid reservoir insecurely mounted |3.2.B1a| | 1 |
| Rear Brake fluid reservoir severely damaged |3.2.B1b| | 1 |
| Rear suspension component loose |2.4.A.1a| | 1 |
| Front Headlamp at least one does not illuminate on main beam |1.2.2a|ii|| | 1 |
| Nearside Direction indicator flashing less than 60 times a minute |1.5.1c| | 1 |
| Offside Direction indicator flashing less than 60 times a minute |1.5.1c| | 1 |
| Rear Rear wheel bearings have excessive free play |2.4.A.2c| | 1 |
| Clutch lever positioned so it cannot be readily operated. |6.2.1g| | 1 |
| Front Headlamp deteriorated and function impaired |1.2.3a| | 1 |
| Front Brake lining|s| less than 1.5 mm thick |3.2.A1f|i|| | 1 |
| Rear Brake lining|s| less than 1.5 mm thick |3.2.A1f|i|| | 1 |
| Rear Stop lamp emits other than a steady red light |1.3.1b| | 1 |
| Rear Rear position lamp incorrect colour |1.1.2b| | 1 |
| Nearside Front Front shock absorber seal failed and leaking oil |2.3.3| | 1 |
| Offside Front Front shock absorber seal failed and leaking oil |2.3.3| | 1 |
| Hydraulic brake control feels spongy |3.1.4a| | 1 |
| Brake lever is so short and the brake cannot be readily applied |3.1.3c| | 1 |
| Horn is not continous or uniform |1.7.3c| | 1 |
| Front Wheel spoke excessively loose |4.2.1b| | 1 |
| Front Headlamp aim beam image kick up to the offside |1.6| | 1 |
| Rear Drive chain excessively loose |6.2.1d| | 1 |
| Nearside Direction indicator not working |1.5.1c| | 1 |
| Offside Direction indicator not working |1.5.1c| | 1 |
| Rear mono-shock insecure |2.4.B.4| | 1 |
| Centre Rear suspension bush excessively deteriorated |2.4.A2a|i|| | 1 |
| Nearside Rear Direction indicators not working |1.5.1c| | 1 |
| Headlamp at least one does not illuminate on main beam |1.2.2a|ii|| | 1 |
| Front Upper Headlamp at least one does not illuminate on dipped beam |1.2.2a|i|| | 1 |
| Nearside Rear Upper Direction indicators not working |1.5.1c| | 1 |
| Rear Footrest missing |6.2.1a| | 1 |
| Centre Rear Rear reflector on motorcycle missing |1.4.1| | 1 |
| Nearside Rear Lower Locking device|s| not correctly fitted which may make the motor bicycle dangerous to ride |6.2.1h| | 1 |
| Centre Rear Lower Rear suspension bush has excessive free play |2.4.A2a|i|| | 1 |
| Floor brake test No brake control achieves an efficiency of 30%. |3.3.C1a| | 1 |
| Floor brake test Neither brake control achieves an efficiency of 25% |3.3.C1b| | 1 |
| Front Exhaust is leaking and excessively noisey |7.1.1b| | 1 |
| Rear Brake master cylinder leaking hydraulic fluid |3.2.B1e| | 1 |
| Front Steering movement excessively stiff with the weight on the lower bearing |2.2.1a| | 1 |
| Front Front mudguard can easily contact any fixed point of the motor bicycle. |2.3.7| | 1 |
| Rear Lower Rear suspension bush has excessive free play |2.4.A2a|i|| | 1 |
| Stop lamp remains on when the brake is released |1.3.1e| | 1 |
| Direction indicators flashing less than 60 times a minute |1.5.1c| | 1 |
| Offside Rear Direction indicator not working |1.5.1c| | 1 |
| Rear Wheel spoke excessively loose |4.2.1b| | 1 |
| Rear shock absorber seal failed and leaking oil |2.4.A.1c| | 1 |
| Headlamp dipped beam affected by the operation of another lamp |1.2.2c| | 1 |
| Brake pedal insecure |3.1.2a| | 1 |
| Front shock absorber seal failed and leaking oil |2.3.3| | 1 |
| Front suspension assembly component excessively misaligned |2.3.1| | 1 |
| Rear reflector missing (4.8.2 (a) (ii)) | 1 |
| Front Wheel has an excessively distorted bead rim. |4.2.2| | 1 |
| Riders seat insecure |6.2.1a| | 1 |
| Rear reflector missing |4.8.2 |a| |ii|| | 1 |
| Front Brake master cylinder fluid level dangerously low |3.2.B1d| | 1 |
| Offside Handlebar handgrip not secure to handlebars. |2.1.1c| | 1 |
| Front Horn not loud enough to be heard by another road user |1.7.3a| | 1 |
| Front Steering headbearing has excessive free play |2.2.2| | 1 |
| Nearside Drive chain excessively loose |6.2.1d| | 1 |
| Rear Lower Rear mono-shock pivot excessively worn |2.4.B.4| | 1 |
| Front Horn is not a constant note |1.7.3c| | 1 |
| Drive chain fouling another component |6.2.1d| | 1 |
| Front Brake disc|s| excessively worn |3.2.A1l| | 1 |
| Rear Brake disc|s| excessively worn |3.2.A1l| | 1 |
| Front Brake pipe likely to be fouled or trapped by moving parts |3.2.B2c| | 1 |
| Lower Rear suspension bush has excessive free play |2.4.A2a|i|| | 1 |
| Front wheel spindle loose |2.3.5a| | 1 |
| Front wheel spindle securing nut|s| loose |2.3.5a| | 1 |
| Roller brake test No brake control achieves an efficiency of 30%. |3.3.A2a| | 1 |
| Horn missing |1.7.1| | 1 |
| Front Roller brake test indicates a sticking brake |3.3.A1a| | 1 |
| Lower Rear mono-shock pivot excessively worn |2.4.B.4| | 1 |
| Rear Brake locking device insecure |3.2.A1e| | 1 |
| Offside Rear Footrest missing |6.2.1a| | 1 |
| Steering headbearing has excessive free play |2.2.2| | 1 |
| Rear Front wheel bearings have excessive free play |2.3.5b| | 1 |
| Rear Drive chain worn to excess |6.2.1e| | 1 |
| Rear Locking device|s| not correctly fitted which may make the motor bicycle dangerous to ride |6.2.1h| | 1 |
| Front Direction indicator not working |1.5.1c| | 1 |
| Rear Direction indicator not working |1.5.1c| | 1 |