| Most common failures | No# failures |
|---|
| Headlamp aim out of alignment | 18 |
| Brake hose excessively deteriorated | 8 |
| Rear suspension bush has excessive free play |2.4.A2a|i|| | 6 |
| Rear reflector on motorcycle missing |1.4.1| | 6 |
| Drive chain excessively loose |6.2.1d| | 5 |
| Rear suspension movement is excessively stiff |2.4.A.3b| | 4 |
| Rear position lamp does not illuminate immediately when it is switched on |1.1.3a| | 4 |
| Headlamp at least one does not illuminate on dipped beam |1.2.2a|i|| | 4 |
| Rear mono-shock pivot excessively worn |2.4.B.4| | 4 |
| Front position lamp does not illuminate immediately when switched on |1.1.3a| | 3 |
| Rear Rear reflector on motorcycle missing |1.4.1| | 3 |
| Front Direction indicator incorrect colour |1.5.1b| | 3 |
| Offside Front Direction indicator incorrect colour |1.5.1b| | 3 |
| Headlamp dipped beam affected by the operation of another lamp |1.2.2c| | 3 |
| Nearside Rear Direction indicators not working |1.5.1c| | 3 |
| Drive chain excessively tight |6.2.1d| | 3 |
| Brake hose damaged | 3 |
| Rear Drive chain worn to excess |6.2.1e| | 2 |
| Steering movement excessively `notchy` with the weight on the lower bearing |2.2.1a| | 2 |
| Throttle operating incorrectly |6.2.1f| | 2 |
| Stop lamp remains on when the brake is released |1.3.1e| | 2 |
| Horn not working |1.7.3a| | 2 |
| Rear Direction indicator incorrect colour |1.5.1b| | 2 |
| Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 2 |
| Registration plate issues | 2 |
| Rear suspension component seized |2.4A2a|ii|| | 2 |
| Exhaust mounting missing |7.1.1c| | 2 |
| Exhaust is leaking and excessively noisey |7.1.1b| | 2 |
| Nearside Front Direction indicator incorrect colour |1.5.1b| | 2 |
| Nearside Rear Direction indicator incorrect colour |1.5.1b| | 2 |
| Front Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 2 |
| Position lamp switch insecure |1.1.4b| | 2 |
| Front Steering lock stop missing |2.1.3| | 2 |
| Headlamp at least one does not illuminate on main beam |1.2.2a|ii|| | 2 |
| Steering movement excessively `notchy` with the wheel raised |2.2.1b| | 2 |
| Front Headlamp at least one does not illuminate on dipped beam |1.2.2a|i|| | 2 |
| Rear shock absorber has inadequate damping effect. |2.4.A.3b| | 2 |
| Drive chain worn to excess |6.2.1e| | 2 |
| Locking device|s| not correctly fitted which may make the motor bicycle dangerous to ride |6.2.1h| | 2 |
| Chain guard insecure |6.2.1c| | 2 |
| Front wheel bearings have excessive free play |2.3.5b| | 2 |
| Footrest insecure |6.2.1a| | 2 |
| Indicator switch defective |1.5.4| | 2 |
| Front Steering headbearing has excessive free play |2.2.2| | 1 |
| Nearside Front Direction indicator flashing less than 60 times a minute |1.5.1c| | 1 |
| Nearside Rear Direction indicator flashing less than 60 times a minute |1.5.1c| | 1 |
| Headlamp aim beam image kick up to the offside |1.6| | 1 |
| Rear Upper Exhaust mounting missing |7.1.1c| | 1 |
| Rear Rear mono-shock pivot seized |2.4.B.4| | 1 |
| Front Wheel spoke excessively loose |4.2.1b| | 1 |
| Lower Rear suspension bush has excessive free play |2.4.A2a|i|| | 1 |
| Front Wheel has an excessively eccentric bead rim. |4.2.2| | 1 |
| Nearside Footrest insecure |6.2.1a| | 1 |
| Wheel alignment incorrect which adversely affects the handling |2.5.1| | 1 |
| Nearside Front Handlebar handgrip not secure to handlebars. |2.1.1c| | 1 |
| Offside Rear Direction indicator incorrect colour |1.5.1b| | 1 |
| Rear Direction indicator not working |1.5.1c| | 1 |
| Offside Rear Direction indicator insecure |1.5.3b| | 1 |
| Rear Stop lamp remains on when the brake is released |1.3.1e| | 1 |
| Offside Rear Direction indicator not working |1.5.1c| | 1 |
| Front Headlamp aim beam image kick up to the offside |1.6| | 1 |
| Horn not loud enough to be heard by another road user |1.7.3a| | 1 |
| Rear Rear suspension movement is excessively stiff |2.4.A.3b| | 1 |
| Lower Fuel system component leaking |7.2.1a| | 1 |
| Headlamp main beam affected by the operation of another lamp |1.2.2c| | 1 |
| Horn is not continous or uniform |1.7.3c| | 1 |
| Nearside Rear Direction indicator not working |1.5.1c| | 1 |
| Riders seat insecure |6.2.1a| | 1 |
| Rear position lamp insecure |1.1.1c| | 1 |
| Front suspension fouling which affects the movement of the front suspension. |2.3.6a| | 1 |
| Upper Rear suspension bush has excessive free play |2.4.A2a|i|| | 1 |
| Headlamp switch insecure |1.2.4| | 1 |
| Nearside Handlebar handgrip not secure to handlebars. |2.1.1c| | 1 |
| Rear Roller brake test indicates brake effort fall disproportional to brake lever or pedal effort |3.3.A1c| | 1 |
| Front Brake hose fouling |3.2.B3b| | 1 |
| Stop lamp affected by the operation of another lamp |1.3.2| | 1 |
| Rear Direction indicator affected by the operation of another lamp |1.5.1c| | 1 |
| Steering headbearing has excessive free play |2.2.2| | 1 |
| Offside Footrest insecure |6.2.1a| | 1 |
| Front wheel spindle securing nut|s| loose |2.3.3a| | 1 |
| Centre Exhaust mounting does not fully support the exhaust system |7.1.1.c| | 1 |
| Rear Brake pedal is bent and the brake cannot be readily applied |3.1.3c| | 1 |
| Lower Rear mono-shock pivot excessively worn |2.4.B.4| | 1 |
| Rear wheel bearings have excessive free play |2.4.A.2c| | 1 |
| Rear Wheel has an excessively distorted bead rim. |4.2.2| | 1 |
| Motorcycle structure cracked |6.1.1a| | 1 |
| Headlamp aim not tested |1.6| | 1 |
| Centre Motorcycle structure insecure and likely to affect the correct functioning of the steering or braking |6.1.1c| | 1 |
| Direction indicator missing |1.5.1a| | 1 |
| Rear Roller brake test indicates brake effort rise disproportional to brake lever or pedal effort |3.3.A1c| | 1 |
| Roller brake test The less effective brake control does not achieve an efficiency of 25%. |3.3.A2b| | 1 |
| Front Wheel has an excessively distorted bead rim. |4.2.2| | 1 |
| Handlebar handgrip not secure to handlebars. |2.1.1c| | 1 |
| Brake pedal is bent and the brake cannot be readily applied |3.1.3c| | 1 |
| Exhaust mounting does not fully support the exhaust system |7.1.1.c| | 1 |
| Motorcycle structure insecure and likely to affect the correct functioning of the steering or braking |6.1.1c| | 1 |
| Direction indicators flashing more than 120 times per minute |1.5.1c| | 1 |
| Horn control defective |1.7.2a| | 1 |
| Rear Drive chain sprocket worn to excess |6.2.1e| | 1 |
| Rear Floor brake test indicates a binding brake |3.3.C2c| | 1 |
| Rear Floor brake test indicates a sticking brake |3.3.C2c| | 1 |
| Rear Floor brake test indicates a severely grabbing brake |3.3.C2d| | 1 |
| Rear mono-shock pivot seized |2.4.B.4| | 1 |
| Decelerometer brake test the less effective brake control does not achieve an efficiency of 25%. |3.3.E1b| | 1 |
| Rear Brake pedal has inadequate reserve travel |3.1.3b| | 1 |
| Rear suspension bearing has excessive free play |2.4.A2a|i|| | 1 |
| Floor brake test The less effective brake control does not achieve an efficiency of 25%. |3.3.C1b| | 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 |
| Front Headlamp at least one does not illuminate on main beam |1.2.2a|ii|| | 1 |
| Nearside Front Direction indicators not working |1.5.1c| | 1 |
| Offside Front Direction indicators not working |1.5.1c| | 1 |
| Offside Rear Direction indicators not working |1.5.1c| | 1 |
| Rear Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 1 |
| Rear Rear wheel bearings have excessive free play |2.4.A.2c| | 1 |
| Rear Rear suspension bush has excessive free play |2.4.A2a|i|| | 1 |