| Most common failures | No# failures |
|---|
| Headlamp aim out of alignment | 159 |
| Rear reflector on motorcycle missing |1.4.1| | 141 |
| Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 67 |
| Registration plate issues | 65 |
| Headlamp at least one does not illuminate on dipped beam |1.2.2a|i|| | 64 |
| Rear position lamp does not illuminate immediately when it is switched on |1.1.3a| | 63 |
| Steering headbearing has excessive free play |2.2.2| | 63 |
| Rear Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 52 |
| Front Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 46 |
| Horn not working |1.7.3a| | 45 |
| Rear reflector on motorcycle obscured |1.4.1| | 40 |
| Rear suspension bush has excessive free play |2.4.A2a|i|| | 39 |
| Headlamp at least one does not illuminate on main beam |1.2.2a|ii|| | 38 |
| Exhaust is leaking and excessively noisey |7.1.1b| | 33 |
| Offside Front shock absorber seal failed and leaking oil |2.3.3| | 28 |
| Stop lamp remains on when the brake is released |1.3.1e| | 28 |
| Riders seat insecure |6.2.1a| | 25 |
| Steering movement excessively `notchy` with the wheel raised |2.2.1b| | 24 |
| Front suspension has excessive stiffness in the suspension movement. |2.3.6b| | 24 |
| Nearside Front Direction indicator incorrect colour |1.5.1b| | 24 |
| Rear shock absorber has inadequate damping effect. |2.4.A.3b| | 24 |
| Nearside Front shock absorber seal failed and leaking oil |2.3.3| | 23 |
| Rear wheel bearings have excessive free play |2.4.A.2c| | 22 |
| 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| | 20 |
| Exhaust mounting does not fully support the exhaust system |7.1.1.c| | 19 |
| Headlamp aim headlamp deteriorated and function impaired |1.2.3a| | 18 |
| Offside Front Direction indicator not working |1.5.1c| | 18 |
| Nearside Lower Rear suspension bearing has excessive free play |2.4.A2a|i|| | 17 |
| Offside Lower Rear suspension bearing has excessive free play |2.4.A2a|i|| | 17 |
| Front shock absorber seal failed and leaking oil |2.3.3| | 16 |
| Throttle operating incorrectly |6.2.1f| | 16 |
| Front suspension has inadequate damping effect. |2.3.6c| | 15 |
| Front position lamp does not illuminate immediately when switched on |1.1.3a| | 14 |
| Nearside Front Direction indicator not working |1.5.1c| | 14 |
| Fuel cap sealing washer missing |7.2.2c| | 13 |
| Steering movement excessively `notchy` with the weight on the lower bearing |2.2.1a| | 13 |
| Offside Front Direction indicator incorrect colour |1.5.1b| | 13 |
| Rear Stop lamp remains on when the brake is released |1.3.1e| | 13 |
| Offside Rear Direction indicator not working |1.5.1c| | 13 |
| Front Roller brake test indicates a binding brake |3.3.A1a| | 13 |
| Headlamp aim not tested |1.6| | 12 |
| Front suspension assembly excessive wear or free play in a front suspension component |2.3.4| | 12 |
| Stop lamp emits other than a steady red light |1.3.1b| | 12 |
| Roller brake test The less effective brake control does not achieve an efficiency of 25%. |3.3.A2b| | 12 |
| Headlamp switch faulty |1.2.4| | 11 |
| Front Stop lamp remains on when the brake is released |1.3.1e| | 11 |
| Rear position lamp incorrect colour |1.1.2b| | 10 |
| Indicator switch defective |1.5.4| | 10 |
| Wheel alignment incorrect which adversely affects the handling |2.5.1| | 10 |
| Nearside Handlebar handgrip not secure to handlebars. |2.1.1c| | 10 |
| Rear Rear reflector on motorcycle missing |1.4.1| | 10 |
| Direction indicators not working |1.5.1c| | 10 |
| Rear Rear position lamp does not illuminate immediately when it is switched on |1.1.3a| | 9 |
| Front Headlamp at least one does not illuminate on dipped beam |1.2.2a|i|| | 9 |
| Offside Rear Footrest missing |6.2.1a| | 9 |
| Rear Brake disc|s| excessively scored |3.2.A1l| | 9 |
| Rear suspension bearing has excessive free play |2.4.A2a|i|| | 9 |
| Offside Front Direction indicator insecure |1.5.3b| | 9 |
| Rear Brake lever is so short and the brake cannot be readily applied |3.1.3c| | 8 |
| Exhaust excessively deteriorated |7.1.1a| | 8 |
| Rear shock absorber seal failed and leaking oil |2.4.A.1c| | 8 |
| Front Front suspension has inadequate damping effect. |2.3.6c| | 8 |
| Rear Brake lever is bent and the brake cannot be readily applied |3.1.3c| | 8 |
| Front Brake lever has inadequate reserve travel |3.1.3b| | 7 |
| Front wheel bearings have excessive free play |2.3.5b| | 7 |
| Headlamp aim beam image kick up to the offside |1.6| | 7 |
| Front Headlamp at least one does not illuminate on main beam |1.2.2a|ii|| | 7 |
| Wheel alignment incorrect which adversely affects the steering |2.5.1| | 7 |
| Rear Brake lever has inadequate reserve travel |3.1.3b| | 7 |
| Front Exhaust is leaking and excessively noisey |7.1.1b| | 7 |
| Offside Front Direction indicators not working |1.5.1c| | 6 |
| Front Steering movement excessively `notchy` with the wheel raised |2.2.1b| | 6 |
| Front Steering headbearing has excessive free play |2.2.2| | 6 |
| Rear Brake lever cannot be applied smoothly |3.1.3d| | 6 |
| Horn not loud enough to be heard by another road user |1.7.3a| | 6 |
| Rear Rear shock absorber has inadequate damping effect. |2.4.A.3b| | 6 |
| Nearside Direction indicator not working |1.5.1c| | 6 |
| Horn control defective |1.7.2a| | 6 |
| Nearside Front Direction indicators not working |1.5.1c| | 5 |
| Handlebar mounting clamp bolt loose |2.1.1a| | 5 |
| Rear Roller brake test indicates a binding brake |3.3.A1a| | 5 |
| Rear reflector on motorcycle obscured |1.4.2b| | 5 |
| Rear Position lamp not working (4.2.1 (a)) | 5 |
| Rear suspension bush excessively deteriorated |2.4.A2a|i|| | 5 |
| Rear wheel rotation likely to be impeded |6.2.1b| | 5 |
| Headlamp insecure |1.2.3b| | 5 |
| Front Brake disc|s| excessively worn |3.2.A1l| | 5 |
| Rear Rear suspension bush has excessive free play |2.4.A2a|i|| | 5 |
| Nearside Rear Direction indicator not working |1.5.1c| | 5 |
| Steering movement excessively stiff with the wheel raised |2.2.1b| | 5 |
| Nearside Rear Direction indicator incorrect colour |1.5.1b| | 5 |
| Rear Exhaust is leaking and excessively noisey |7.1.1b| | 5 |
| Rear position lamp damaged and function impaired |1.1.1b| | 5 |
| Front Brake lever insecure |3.1.2a| | 5 |
| Nearside Rear Footrest missing |6.2.1a| | 5 |
| Front suspension assembly component excessively bent |2.3.1| | 5 |
| Nearside Rear Direction indicators not working |1.5.1c| | 4 |
| Throttle has a significant change in engine speed whilst moving the steering from lock to lock |2.1.4| | 4 |
| Rear reflector missing |4.8.2 |a| |ii|| | 4 |
| Offside Direction indicator flashing more than 120 times per minute |1.5.1c| | 4 |
| Front Brake hose is likely to be fouled or trapped by moving parts |3.2.B2c| | 4 |
| Headlamp incorrect colour |1.2.1| | 4 |
| Front wheel bearings are excessively rough |2.3.5b| | 4 |
| Nearside Front Direction indicator missing |1.5.1a| | 4 |
| Dipswitch does not extinquish main beam/s, leaving at least 1 dipped beam headlamp |1.2.2b|i|| | 4 |
| Rear Direction indicator not working |1.5.1c| | 4 |
| Rear wheel spindle securing nut locking device missing |2.4.A.2b| | 4 |
| Nearside Front Direction indicator insecure |1.5.3b| | 4 |
| Rear Stop lamp not working (4.3.1 (a) (ii)) | 4 |
| Front Brake lever is bent and the brake cannot be readily applied |3.1.3c| | 4 |
| Nearside Rear shock absorber seal failed and leaking oil |2.4.A.1c| | 4 |
| Nearside Indicator tell tale not functioning |1.5.2| | 4 |
| Offside Indicator tell tale not functioning |1.5.2| | 4 |
| Rear 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| | 4 |
| Front Direction indicators not working |1.5.1c| | 4 |
| Rear Direction indicators not working |1.5.1c| | 4 |
| Rear Rear reflector on motorcycle obscured |1.4.1| | 4 |
| Rear suspension component loose |2.4.A.1a| | 4 |
| Offside Front Direction indicator missing |1.5.1a| | 4 |
| Rear reflector missing (4.8.2 (a) (ii)) | 4 |
| Direction indicators flashing more than 120 times per minute |1.5.1c| | 4 |
| Headlamp aim headlamp damaged and function impaired |1.2.3a| | 4 |
| Rear Brake pipe inadequately supported |3.2.B2b| | 4 |
| Fuel system component leaking |7.2.1a| | 4 |
| Front Brake lever is so short and the brake cannot be readily applied |3.1.3c| | 4 |