| Most common failures | No# failures |
|---|
| Headlamp aim out of alignment | 1019 |
| Rear reflector on motorcycle missing |1.4.1| | 545 |
| Steering headbearing has excessive free play |2.2.2| | 494 |
| Rear shock absorber has inadequate damping effect. |2.4.A.3b| | 403 |
| Rear Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 247 |
| Roller brake test The less effective brake control does not achieve an efficiency of 25%. |3.3.A2b| | 245 |
| Front Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 244 |
| Front suspension has inadequate damping effect. |2.3.6c| | 242 |
| Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 216 |
| Rear Brake lever has inadequate reserve travel |3.1.3b| | 215 |
| Registration plate issues | 192 |
| Headlamp at least one does not illuminate on dipped beam |1.2.2a|i|| | 173 |
| Rear position lamp does not illuminate immediately when it is switched on |1.1.3a| | 157 |
| Rear Rear reflector on motorcycle missing |1.4.1| | 151 |
| Exhaust is leaking and excessively noisey |7.1.1b| | 151 |
| Rear Rear shock absorber has inadequate damping effect. |2.4.A.3b| | 149 |
| Front shock absorber seal failed and leaking oil |2.3.3| | 131 |
| Front Steering headbearing has excessive free play |2.2.2| | 123 |
| Front Front suspension has inadequate damping effect. |2.3.6c| | 122 |
| Front suspension assembly excessive wear or free play in a front suspension component |2.3.4| | 107 |
| Front wheel bearings are excessively rough |2.3.5b| | 91 |
| Front wheel bearings have excessive free play |2.3.5b| | 90 |
| Horn not working |1.7.3a| | 89 |
| Riders seat insecure |6.2.1a| | 85 |
| Headlamp at least one does not illuminate on main beam |1.2.2a|ii|| | 79 |
| Rear shock absorber seal failed and leaking oil |2.4.A.1c| | 65 |
| Front Front shock absorber seal failed and leaking oil |2.3.3| | 65 |
| Headlamp insecure |1.2.3b| | 63 |
| Nearside Front Direction indicator not working |1.5.1c| | 62 |
| Fuel cap sealing washer missing |7.2.2c| | 60 |
| Offside Rear Direction indicator incorrect colour |1.5.1b| | 59 |
| Offside Front Direction indicator not working |1.5.1c| | 58 |
| Roller brake test No brake control achieves an efficiency of 30%. |3.3.A2a| | 58 |
| 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| | 57 |
| Front Brake lever has inadequate reserve travel |3.1.3b| | 54 |
| Rear position lamp insecure |1.1.1c| | 52 |
| Rear reflector on motorcycle obscured |1.4.1| | 51 |
| Front position lamp does not illuminate immediately when switched on |1.1.3a| | 49 |
| Steering movement excessively stiff with the wheel raised |2.2.1b| | 47 |
| Front Headlamp at least one does not illuminate on dipped beam |1.2.2a|i|| | 46 |
| Exhaust mounting does not fully support the exhaust system |7.1.1.c| | 45 |
| Offside Steering lock stop ineffective |2.1.3| | 45 |
| Floor brake test The less effective brake control does not achieve an efficiency of 25%. |3.3.C1b| | 43 |
| Front Brake disc|s| excessively worn |3.2.A1l| | 41 |
| Wheel alignment incorrect which adversely affects the handling |2.5.1| | 39 |
| Horn not loud enough to be heard by another road user |1.7.3a| | 39 |
| Rear Roller brake test indicates excessive fluctuation of brake effort |3.3.A1d| | 37 |
| Wheel alignment incorrect which adversely affects the steering |2.5.1| | 36 |
| Offside Front Direction indicators not working |1.5.1c| | 35 |
| Roller brake test Neither brake control achieves an efficiency of 25% |3.3.A2b| | 34 |
| Headlamp aim not tested |1.6| | 34 |
| Stop lamp affected by the operation of another lamp |1.3.2| | 33 |
| Rear Brake disc|s| excessively scored |3.2.A1l| | 33 |
| Steering control fouling between components which interferes with the free movement of the steering |2.1.2a| | 33 |
| Front suspension has excessive stiffness in the suspension movement. |2.3.6b| | 32 |
| Throttle has a significant change in engine speed whilst moving the steering from lock to lock |2.1.4| | 32 |
| Nearside Front Direction indicators not working |1.5.1c| | 31 |
| Steering movement excessively `notchy` with the wheel raised |2.2.1b| | 30 |
| Rear wheel rotation likely to be impeded |6.2.1b| | 30 |
| Indicator tell tale not functioning |1.5.2| | 30 |
| Headlamp aim beam image kick up to the offside |1.6| | 30 |
| Direction indicators not working |1.5.1c| | 29 |
| Steering movement excessively `notchy` with the weight on the lower bearing |2.2.1a| | 28 |
| Offside Front Direction indicator incorrect colour |1.5.1b| | 28 |
| Fairings insecure and likely to impede the steering |2.1.2e| | 28 |
| Steering movement excessively stiff with the weight on the lower bearing |2.2.1a| | 27 |
| Offside Rear Direction indicator not working |1.5.1c| | 27 |
| Nearside Rear Direction indicator not working |1.5.1c| | 26 |
| Rear Brake disc|s| excessively worn |3.2.A1l| | 25 |
| Direction indicators affected by the operation of another lamp |1.5.1c| | 25 |
| Rear Hydraulic brake control feels spongy |3.1.4a| | 25 |
| Nearside Rear Direction indicator incorrect colour |1.5.1b| | 25 |
| Nearside Handlebar handgrip not secure to handlebars. |2.1.1c| | 24 |
| Rear Brake lining|s| less than 1.5 mm thick |3.2.A1f|i|| | 24 |
| Rear position lamp incorrect colour |1.1.2b| | 24 |
| Front suspension assembly component loose |2.3.1| | 24 |
| Front Headlamp at least one does not illuminate on main beam |1.2.2a|ii|| | 23 |
| Rear Rear position lamp does not illuminate immediately when it is switched on |1.1.3a| | 23 |
| Brake lever has inadequate reserve travel |3.1.3b| | 23 |
| Rear Roller brake test indicates brake effort rise disproportional to brake lever or pedal effort |3.3.A1c| | 22 |
| Nearside Brake lever has inadequate reserve travel |3.1.3b| | 22 |
| Front Hydraulic brake control feels spongy |3.1.4a| | 22 |
| Rear Roller brake test indicates a binding brake |3.3.A1a| | 22 |
| Rear Rear shock absorber seal failed and leaking oil |2.4.A.1c| | 21 |
| Front Front position lamp does not illuminate immediately when switched on |1.1.3a| | 21 |
| Front Roller brake test indicates excessive fluctuation of brake effort |3.3.A1d| | 20 |
| Rear wheel bearings have excessive free play |2.4.A.2c| | 20 |
| Rear position lamp adversely affected by the operation of another lamp |1.1.3b| | 20 |
| Headlamp aim headlamp deteriorated and function impaired |1.2.3a| | 19 |
| Front Brake disc|s| excessively scored |3.2.A1l| | 19 |
| Exhaust mounting missing |7.1.1c| | 19 |
| Rear Front suspension has inadequate damping effect. |2.3.6c| | 19 |
| Front Fairings insecure and likely to impede the steering |2.1.2e| | 18 |
| Front Front wheel bearings have excessive free play |2.3.5b| | 18 |
| Nearside Front Direction indicator incorrect colour |1.5.1b| | 18 |
| Front Front suspension assembly excessive wear or free play in a front suspension component |2.3.4| | 18 |
| Front Wheel alignment incorrect which adversely affects the steering |2.5.1| | 18 |
| Rear Roller brake test indicates brake effort fall disproportional to brake lever or pedal effort |3.3.A1c| | 18 |
| Stop lamp emits other than a steady red light |1.3.1b| | 18 |
| Rear Brake hose is likely to be fouled or trapped by moving parts |3.2.B2c| | 18 |
| Lower Steering headbearing has excessive free play |2.2.2| | 18 |
| Front suspension assembly has excessive free play in the pivot bearings. |2.3.2| | 17 |
| Front Front wheel bearings are excessively rough |2.3.5b| | 17 |
| An item not tested |Manual| | 17 |
| Rear reflector missing (4.8.2 (a) (ii)) | 17 |
| Front suspension assembly component excessively bent |2.3.1| | 16 |
| Handlebar mounting clamp bolt loose |2.1.1a| | 16 |
| Headlamp dipped beam affected by the operation of another lamp |1.2.2c| | 15 |
| Rear Exhaust is leaking and excessively noisey |7.1.1b| | 15 |
| Front Steering linkage has excessive free play |2.2.2| | 15 |
| Centre Front Steering headbearing has excessive free play |2.2.2| | 15 |
| Front Wheel alignment incorrect which adversely affects the handling |2.5.1| | 15 |