| Most common failures | No# failures |
|---|
| Rear reflector on motorcycle missing |1.4.1| | 207 |
| Headlamp aim out of alignment | 118 |
| Steering headbearing has excessive free play |2.2.2| | 91 |
| Front Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 88 |
| Rear Brake lever has inadequate reserve travel |3.1.3b| | 61 |
| Registration plate issues | 60 |
| Exhaust is leaking and excessively noisey |7.1.1b| | 57 |
| Horn not working |1.7.3a| | 53 |
| Headlamp at least one does not illuminate on dipped beam |1.2.2a|i|| | 50 |
| Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 45 |
| Rear Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 43 |
| Rear shock absorber has inadequate damping effect. |2.4.A.3b| | 40 |
| Front suspension has excessive stiffness in the suspension movement. |2.3.6b| | 37 |
| Front suspension assembly excessive wear or free play in a front suspension component |2.3.4| | 35 |
| Front Roller brake test indicates a binding brake |3.3.A1a| | 29 |
| Riders seat insecure |6.2.1a| | 28 |
| Direction indicators flashing more than 120 times per minute |1.5.1c| | 26 |
| Roller brake test The less effective brake control does not achieve an efficiency of 25%. |3.3.A2b| | 25 |
| Rear position lamp does not illuminate immediately when it is switched on |1.1.3a| | 25 |
| Horn not loud enough to be heard by another road user |1.7.3a| | 24 |
| Rear Rear reflector on motorcycle missing |1.4.1| | 23 |
| Throttle operating incorrectly |6.2.1f| | 21 |
| Direction indicators not working |1.5.1c| | 21 |
| 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 |
| Rear wheel bearings have excessive free play |2.4.A.2c| | 20 |
| Front Steering headbearing has excessive free play |2.2.2| | 19 |
| Headlamp insecure |1.2.3b| | 18 |
| Exhaust mounting does not fully support the exhaust system |7.1.1.c| | 18 |
| Front suspension has inadequate damping effect. |2.3.6c| | 16 |
| Front position lamp incorrect colour |1.1.2a| | 13 |
| Rear reflector missing (4.8.2 (a) (ii)) | 12 |
| Front Headlamp at least one does not illuminate on dipped beam |1.2.2a|i|| | 11 |
| Front Front suspension has excessive stiffness in the suspension movement. |2.3.6b| | 11 |
| Steering movement excessively `notchy` with the weight on the lower bearing |2.2.1a| | 10 |
| Nearside Front Front suspension assembly excessive wear or free play in a front suspension component |2.3.4| | 10 |
| Rear position lamp adversely affected by the operation of another lamp |1.1.3b| | 10 |
| Nearside Rear Direction indicator not working |1.5.1c| | 10 |
| Indicator switch defective |1.5.4| | 9 |
| Nearside Brake lever has inadequate reserve travel |3.1.3b| | 9 |
| Front Front suspension assembly excessive wear or free play in a front suspension component |2.3.4| | 9 |
| Steering movement excessively `notchy` with the wheel raised |2.2.1b| | 9 |
| Offside Front Front suspension assembly excessive wear or free play in a front suspension component |2.3.4| | 9 |
| Rear Rear shock absorber has inadequate damping effect. |2.4.A.3b| | 9 |
| Rear Stop lamp remains on when the brake is released |1.3.1e| | 9 |
| Front position lamp does not illuminate immediately when switched on |1.1.3a| | 9 |
| Headlamp aim not tested |1.6| | 9 |
| Front Stop lamp remains on when the brake is released |1.3.1e| | 9 |
| Nearside Handlebar handgrip not secure to handlebars. |2.1.1c| | 9 |
| Nearside Rear Direction indicator insecure |1.5.3b| | 9 |
| Headlamp at least one does not illuminate on main beam |1.2.2a|ii|| | 8 |
| Offside Front Front shock absorber seal failed and leaking oil |2.3.3| | 8 |
| Front Direction indicator flashing more than 120 times per minute |1.5.1c| | 8 |
| Direction indicator flashing more than 120 times per minute |1.5.1c| | 8 |
| Wheel alignment incorrect which adversely affects the steering |2.5.1| | 8 |
| Direction indicator not working |1.5.1c| | 8 |
| Offside Rear Direction indicator not working |1.5.1c| | 8 |
| Direction indicators affected by the operation of another lamp |1.5.1c| | 8 |
| Nearside Front Front shock absorber seal failed and leaking oil |2.3.3| | 7 |
| Rear shock absorber seal failed and leaking oil |2.4.A.1c| | 7 |
| Exhaust mounting missing |7.1.1c| | 7 |
| Nearside Direction indicators not working |1.5.1c| | 7 |
| Offside Front Direction indicators flashing more than 120 times per minute |1.5.1c| | 7 |
| Rear wheel insecure |4.2.3b| | 7 |
| Stop lamp affected by the operation of another lamp |1.3.2| | 7 |
| Fairings insecure and likely to impede the steering |2.1.2e| | 7 |
| Rear wheel rotation likely to be impeded |6.2.1b| | 7 |
| Front shock absorber seal failed and leaking oil |2.3.3| | 7 |
| Stop lamp remains on when the brake is released |1.3.1e| | 7 |
| Front Horn not working |1.7.3a| | 6 |
| Nearside Front Direction indicators flashing more than 120 times per minute |1.5.1c| | 6 |
| Brake lever has inadequate reserve travel |3.1.3b| | 6 |
| Rear Direction indicator flashing more than 120 times per minute |1.5.1c| | 6 |
| Front Stop lamp does not emit a steady light |1.3.1b| | 6 |
| Handlebar mounting clamp bolt loose |2.1.1a| | 6 |
| Front Front shock absorber seal failed and leaking oil |2.3.3| | 6 |
| Rear position lamp deteriorated and function impaired |1.1.1b| | 6 |
| Nearside Front shock absorber seal failed and leaking oil |2.3.3| | 6 |
| Rear Stop lamp does not emit a steady light |1.3.1b| | 6 |
| Front suspension assembly component excessively bent |2.3.1| | 6 |
| Front position lamp insecure |1.1.1c| | 6 |
| Front Front position lamp does not illuminate immediately when switched on |1.1.3a| | 5 |
| Wheel alignment incorrect which adversely affects the handling |2.5.1| | 5 |
| Stop lamp does not emit a steady light |1.3.1b| | 5 |
| Nearside Front Direction indicator not working |1.5.1c| | 5 |
| Offside Front Direction indicator not working |1.5.1c| | 5 |
| Nearside Front Direction indicator damaged and function impaired |1.5.3a| | 5 |
| Nearside Rear Brake lever has inadequate reserve travel |3.1.3b| | 5 |
| Horn is not a constant note |1.7.3c| | 5 |
| Centre Rear Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 5 |
| Offside Front shock absorber seal failed and leaking oil |2.3.3| | 5 |
| Front position lamp adversely affected by the operation of another lamp |1.1.3b| | 5 |
| Rear Direction indicator not working |1.5.1c| | 5 |
| Rear Direction indicators flashing more than 120 times per minute |1.5.1c| | 5 |
| Offside Front Direction indicator damaged and function impaired |1.5.3a| | 5 |
| Front mudguard insecure |2.3.7| | 5 |
| Rear Roller brake test indicates a binding brake |3.3.A1a| | 4 |
| Nearside Direction indicator not working |1.5.1c| | 4 |
| Front Fairings insecure and likely to impede the steering |2.1.2e| | 4 |
| Nearside Front Direction indicators not working |1.5.1c| | 4 |
| Leg shield insecure and likely to impede the steering |2.1.2e| | 4 |
| Offside Direction indicators not working |1.5.1c| | 4 |
| Offside Rear Direction indicators flashing more than 120 times per minute |1.5.1c| | 4 |
| Nearside Front Brake lever has inadequate reserve travel |3.1.3b| | 4 |
| Nearside Rear Direction indicators not working |1.5.1c| | 4 |
| Rear shock absorber insecurely mounted |2.4.A.3b| | 4 |
| Front Motorcycle structure insecure and likely to affect the correct functioning of the steering or braking |6.1.1c| | 4 |
| All position lamps adversely affected by the operation of another lamp |1.1.3b| | 4 |
| Rear Wheel bearing has excessive play (5.1.3 (a) (i)) | 4 |
| Rear Brake lever insecure |3.1.2a| | 4 |
| Offside Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 4 |
| Rear Brake lever attachment screws loose |3.1.2b| | 4 |
| Rear Rear wheel bearings have excessive free play |2.4.A.2c| | 4 |
| Offside Rear Footrest missing |6.2.1a| | 4 |
| Offside Direction indicators flashing more than 120 times per minute |1.5.1c| | 4 |
| Front Floor brake test indicates a binding brake |3.3.C2c| | 4 |
| Exhaust excessively deteriorated |7.1.1a| | 4 |
| Offside Handlebar handgrip not secure to handlebars. |2.1.1c| | 4 |
| Front Direction indicator not working |1.5.1c| | 4 |
| Front Direction indicators flashing more than 120 times per minute |1.5.1c| | 4 |
| Registration plate lamp issues | 4 |
| Steering movement excessively stiff with the weight on the lower bearing |2.2.1a| | 4 |
| Offside Rear Direction indicator insecure |1.5.3b| | 4 |
| Nearside Rear Footrest missing |6.2.1a| | 4 |
| Rear Brake locking device insecure |3.2.A1e| | 4 |
| Front Brake disc|s| excessively scored |3.2.A1l| | 4 |