| Most common failures | No# failures |
|---|
| Headlamp aim out of alignment | 20 |
| Rear reflector on motorcycle missing |1.4.1| | 8 |
| Rear position lamp does not illuminate immediately when it is switched on |1.1.3a| | 7 |
| Headlamp at least one does not illuminate on dipped beam |1.2.2a|i|| | 6 |
| Drive chain worn to excess |6.2.1e| | 6 |
| Rear Drive chain sprocket worn to excess |6.2.1e| | 6 |
| Drive chain sprocket carrier worn to excess |6.2.1e| | 5 |
| Headlamp insecure |1.2.3b| | 5 |
| Rear Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 4 |
| Nearside Front shock absorber seal failed and leaking oil |2.3.3| | 4 |
| Exhaust is leaking and excessively noisey |7.1.1b| | 4 |
| Nearside Handlebar handgrip not secure to handlebars. |2.1.1c| | 4 |
| Horn not working |1.7.3a| | 4 |
| Registration plate issues | 4 |
| Throttle operating incorrectly |6.2.1f| | 4 |
| Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 4 |
| Nearside Front Front shock absorber seal failed and leaking oil |2.3.3| | 4 |
| Headlamp aim beam image kick up to the offside |1.6| | 4 |
| Rear Drive chain worn to excess |6.2.1e| | 3 |
| Wheel alignment incorrect which adversely affects the handling |2.5.1| | 3 |
| Offside Front Front shock absorber seal failed and leaking oil |2.3.3| | 3 |
| Steering headbearing has excessive free play |2.2.2| | 3 |
| Rear Roller brake test indicates a severely grabbing brake |3.3.A1b| | 3 |
| Front Headlamp at least one does not illuminate on dipped beam |1.2.2a|i|| | 3 |
| Front Brake lever has inadequate reserve travel |3.1.3b| | 3 |
| Offside Front shock absorber seal failed and leaking oil |2.3.3| | 3 |
| Headlamp aim headlamp damaged and function impaired |1.2.3a| | 3 |
| Front wheel bearings have excessive free play |2.3.5b| | 3 |
| Drive chain excessively tight |6.2.1d| | 2 |
| Rear suspension movement is excessively stiff |2.4.A.3b| | 2 |
| Front Motorcycle structure excessively damaged |6.1.1a| | 2 |
| Nearside Rear Footrest missing |6.2.1a| | 2 |
| Rear Roller brake test indicates a sticking brake |3.3.A1a| | 2 |
| Indicator switch insecure |1.5.4| | 2 |
| Horn not loud enough to be heard by another road user |1.7.3a| | 2 |
| Drive chain fouling another component |6.2.1d| | 2 |
| Direction indicators not working |1.5.1c| | 2 |
| Offside Rear Direction indicator insecure |1.5.3b| | 2 |
| Wheel alignment incorrect which adversely affects the steering |2.5.1| | 2 |
| Front Headlamp deteriorated and function impaired |1.2.3a| | 2 |
| Front Steering headbearing has excessive free play |2.2.2| | 2 |
| Drive chain excessively loose |6.2.1d| | 2 |
| Direction indicators affected by the operation of another lamp |1.5.1c| | 2 |
| Rear Drive chain excessively tight |6.2.1d| | 2 |
| Horn is not continous or uniform |1.7.3c| | 2 |
| Locking device|s| not correctly fitted which may make the motor bicycle dangerous to ride |6.2.1h| | 2 |
| Indicator tell tale not functioning |1.5.2| | 2 |
| Offside Front Direction indicators not working |1.5.1c| | 2 |
| Steering movement excessively `notchy` with the wheel raised |2.2.1b| | 2 |
| Front Footrest insecure |6.2.1a| | 2 |
| Front Fairing insecure and likely to impede the steering |2.1.2e| | 1 |
| Offside Front Steering control fouling between components which interferes with the free movement of the steering |2.1.2a| | 1 |
| Steering control handlebar movement restricted by taut cables |2.1.2c| | 1 |
| Locking device|s| not correctly fitted which may make the motor bicycle dangerous to ride drive sprocket |6.2.1h| | 1 |
| Nearside Direction indicator flashing more than 120 times per minute |1.5.1c| | 1 |
| Offside Direction indicator flashing more than 120 times per minute |1.5.1c| | 1 |
| Brake pedal has inadequate reserve travel |3.1.3b| | 1 |
| Nearside Rear Direction indicator insecure |1.5.3b| | 1 |
| Rear Stop lamp remains on when the brake is released |1.3.1e| | 1 |
| Rear suspension fouling which affects the movement of the rear suspension
centre stand is secured to swinging arm |2.4.A.3a| | 1 |
| Exhaust mounting does not fully support the exhaust system |7.1.1.c| | 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 |
| Offside Rear Direction indicator not working |1.5.1c| | 1 |
| Offside Rear suspension fouling which affects the movement of the rear suspension |2.4.A.3a| | 1 |
| Clutch lever bent so it cannot be readily operated. |6.2.1g| | 1 |
| Rear wheel bearings have excessive free play |2.4.A.2c| | 1 |
| Front Front position lamp does not illuminate immediately when switched on |1.1.3a| | 1 |
| Front Exhaust is leaking and excessively noisey |7.1.1b| | 1 |
| Front Brake component is severely distorted |3.1.5| | 1 |
| Offside Front Steering lock stop missing |2.1.3| | 1 |
| Nearside Rear Chain guard insecure |6.2.1c| | 1 |
| Nearside Rear Drive chain excessively loose |6.2.1d| | 1 |
| Steering movement excessively stiff with the weight on the lower bearing |2.2.1a| | 1 |
| Nearside Front Direction indicator affected by the operation of another lamp |1.5.1c| | 1 |
| Nearside Rear Direction indicator affected by the operation of another lamp |1.5.1c| | 1 |
| Offside Front 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 Brake hose is likely to be fouled or trapped by moving parts |3.2.B2c| | 1 |
| Brake hose excessively deteriorated | 1 |
| Front All position lamps do not illuminate immediately when switched on |1.1.3a| | 1 |
| Rear All position lamps do not illuminate immediately when switched on |1.1.3a| | 1 |
| Front All position lamps adversely affected by the operation of another lamp |1.1.3b| | 1 |
| Rear All position lamps 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 suspension assembly component excessively corroded. |2.3.1| | 1 |
| Floor brake test The less effective brake control does not achieve an efficiency of 25%. |3.3.C1b| | 1 |
| Nearside Front suspension assembly component excessively corroded. |2.3.1| | 1 |
| Offside Front suspension assembly component excessively corroded. |2.3.1| | 1 |
| Front Headlamp insecure |1.2.3b| | 1 |
| Front Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 1 |
| Headlamp aim headlamp deteriorated and function impaired |1.2.3a| | 1 |
| Nearside Front Footrest insecure |6.2.1a| | 1 |
| Front Headlamp aim beam image kick-up is to the offside |1.6.1| | 1 |
| Front Steering control handlebar movement restricted by taut cables |2.1.2c| | 1 |
| Headlamp main beam affected by the operation of another lamp |1.2.2c| | 1 |
| Rear position lamp adversely affected by the operation of another lamp |1.1.3b| | 1 |
| Front Brake lever is damaged and the brake cannot be readily applied |3.1.3c| | 1 |
| Front Brake lever is so short and the brake cannot be readily applied |3.1.3c| | 1 |
| Rear Rear reflector on motorcycle missing |1.4.1| | 1 |
| Rear Rear wheel bearings have excessive free play |2.4.A.2c| | 1 |
| Rear Brake pedal is inoperative |3.1.3c| | 1 |
| Rear Plate brake test indicates a binding brake |3.3.B1a| | 1 |
| Front Drive chain sprocket worn to excess |6.2.1e| | 1 |
| Rear reflector on motorcycle obscured |1.4.1| | 1 |
| Front Direction indicators flashing more than 120 times per minute |1.5.1c| | 1 |
| Rear Direction indicators flashing more than 120 times per minute |1.5.1c| | 1 |
| Rear Rear shock absorber has inadequate damping effect. |2.4.A.3b| | 1 |
| Rear Exhaust is leaking and excessively noisey |7.1.1b| | 1 |
| Front mudguard insecure |2.3.7| | 1 |
| Rear Drive chain sprocket carrier worn to excess |6.2.1e| | 1 |
| Offside Rear Direction indicator damaged and function impaired |1.5.3a| | 1 |
| Nearside Position lamp switch insecure |1.1.4b| | 1 |
| Seat insecure |6.2.1a| | 1 |
| Front Motorcycle structure insecure and likely to affect the correct functioning of the steering or braking |6.1.1c| | 1 |
| Front Fairing so located that it is likely to impede the steering |2.1.2e| | 1 |
| All direction indicators adversely affected by the operation of another lamp (4.4.3 (b)) | 1 |
| Brake performance not tested |3.3| | 1 |
| Rear Wheel damaged significantly reducing the original strength |4.2.1a| | 1 |
| Rear wheel insecure |4.2.3b| | 1 |
| Front Steering movement excessively `notchy` with the weight on the lower bearing |2.2.1a| | 1 |
| Nearside Front Direction indicators not working |1.5.1c| | 1 |
| Handlebar deformed |2.1.1b| | 1 |
| All position lamps adversely affected by the operation of another lamp |1.1.3b| | 1 |
| All position lamps adversely affected by the operation of the horn |1.1.3b| | 1 |
| Stop lamp affected by the operation of the horn |1.3.2| | 1 |
| Stop lamp affected by the operation of another lamp |1.3.2| | 1 |
| Centre Front Headlamp at least one does not illuminate on dipped beam |1.2.2a|i|| | 1 |
| Centre Front Horn not working |1.7.3a| | 1 |
| Nearside Inner Direction indicators not working |1.5.1c| | 1 |
| Brake pedal insecure |3.1.2a| | 1 |
| Rear wheel rotation likely to be impeded |6.2.1b| | 1 |
| Front Brake back plate|s| insecure |3.2.A1j| | 1 |
| Steering movement excessively stiff with the wheel raised |2.2.1b| | 1 |
| Front wheel bearings are excessively tight |2.3.5b| | 1 |
| Front Motorcycle structure excessively distorted |6.1.1a| | 1 |
| Headlamp at least one does not illuminate on main beam |1.2.2a|ii|| | 1 |
| Front Horn control not functioning. |1.7.2b| | 1 |
| Rear Wheel alignment incorrect which adversely affects the handling |2.5.1| | 1 |
| Front Brake fluid reservoir fluid level dangerously low |3.2.B1d| | 1 |
| Nearside Front Fairings so located that it is likely to impede the steering |2.1.2e| | 1 |
| Rear position lamp damaged and function impaired |1.1.1b| | 1 |
| Brake back plate|s| insecure |3.2.A1j| | 1 |