| Most common failures | No# failures |
|---|
| Rear reflector on motorcycle missing |1.4.1| | 110 |
| Headlamp aim out of alignment | 80 |
| Steering headbearing has excessive free play |2.2.2| | 64 |
| Registration plate issues | 63 |
| Rear Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 56 |
| Rear position lamp does not illuminate immediately when it is switched on |1.1.3a| | 52 |
| Nearside Front shock absorber seal failed and leaking oil |2.3.3| | 45 |
| Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 43 |
| Exhaust is leaking and excessively noisey |7.1.1b| | 39 |
| Fuel cap sealing washer missing |7.2.2c| | 37 |
| Front Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 37 |
| Headlamp at least one does not illuminate on dipped beam |1.2.2a|i|| | 34 |
| Riders seat insecure |6.2.1a| | 34 |
| Offside Front shock absorber seal failed and leaking oil |2.3.3| | 32 |
| Front shock absorber seal failed and leaking oil |2.3.3| | 25 |
| Horn not working |1.7.3a| | 24 |
| Rear shock absorber has inadequate damping effect. |2.4.A.3b| | 23 |
| Exhaust mounting does not fully support the exhaust system |7.1.1.c| | 23 |
| Rear reflector on motorcycle obscured |1.4.1| | 21 |
| Front Brake disc|s| friction surface contaminated by oil or grease |3.2.A1k| | 20 |
| Rear wheel bearings have excessive free play |2.4.A.2c| | 19 |
| Roller brake test The less effective brake control does not achieve an efficiency of 25%. |3.3.A2b| | 18 |
| Steering movement excessively `notchy` with the wheel raised |2.2.1b| | 17 |
| Nearside Front Front shock absorber seal failed and leaking oil |2.3.3| | 16 |
| Horn not loud enough to be heard by another road user |1.7.3a| | 15 |
| Rear Rear reflector on motorcycle missing |1.4.1| | 14 |
| Rear position lamp insecure |1.1.1c| | 13 |
| Direction indicators not working |1.5.1c| | 12 |
| Front Steering headbearing has excessive free play |2.2.2| | 12 |
| Headlamp insecure |1.2.3b| | 12 |
| Offside Front Front shock absorber seal failed and leaking oil |2.3.3| | 11 |
| Headlamp at least one does not illuminate on main beam |1.2.2a|ii|| | 11 |
| Front wheel bearings have excessive free play |2.3.5b| | 11 |
| Nearside Handlebar handgrip not secure to handlebars. |2.1.1c| | 11 |
| Front suspension has inadequate damping effect. |2.3.6c| | 11 |
| Front position lamp does not illuminate immediately when switched on |1.1.3a| | 9 |
| Rear shock absorber seal failed and leaking oil |2.4.A.1c| | 9 |
| Rear Rear position lamp does not illuminate immediately when it is switched on |1.1.3a| | 9 |
| Rear Brake hose is likely to be fouled or trapped by moving parts |3.2.B2c| | 8 |
| Rear Brake lever is so short and the brake cannot be readily applied |3.1.3c| | 8 |
| 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| | 8 |
| Offside Handlebar handgrip not secure to handlebars. |2.1.1c| | 8 |
| Front Front shock absorber seal failed and leaking oil |2.3.3| | 7 |
| Front Brake disc|s| excessively worn |3.2.A1l| | 7 |
| Steering movement excessively `notchy` with the weight on the lower bearing |2.2.1a| | 7 |
| Stop lamp remains on when the brake is released |1.3.1e| | 7 |
| Wheel alignment incorrect which adversely affects the steering |2.5.1| | 6 |
| Fairings insecure and likely to impede the steering |2.1.2e| | 6 |
| Rear position lamp deteriorated and function impaired |1.1.1b| | 6 |
| Handlebar mounting clamp bolt loose |2.1.1a| | 6 |
| Headlamp aim not tested |1.6| | 6 |
| Rear Rear wheel bearings have excessive free play |2.4.A.2c| | 6 |
| Rear wheel rotation likely to be impeded |6.2.1b| | 6 |
| Rear Rear shock absorber has inadequate damping effect. |2.4.A.3b| | 6 |
| Front mudguard insecure |2.3.7| | 6 |
| Exhaust excessively deteriorated |7.1.1a| | 5 |
| Throttle operating incorrectly |6.2.1f| | 5 |
| Rear Brake lever has inadequate reserve travel |3.1.3b| | 5 |
| Rear Brake disc|s| excessively worn |3.2.A1l| | 5 |
| Rear position lamp adversely affected by the operation of another lamp |1.1.3b| | 5 |
| Wheel alignment incorrect which adversely affects the handling |2.5.1| | 5 |
| Rear Brake disc|s| excessively scored |3.2.A1l| | 5 |
| Rear Brake lever is damaged and the brake cannot be readily applied |3.1.3c| | 4 |
| Front Front suspension has inadequate damping effect. |2.3.6c| | 4 |
| Rear position lamp incorrect colour |1.1.2b| | 4 |
| Front Brake lever is so short and the brake cannot be readily applied |3.1.3c| | 4 |
| Indicator tell tale not functioning |1.5.2| | 4 |
| Offside Rear Direction indicator not working |1.5.1c| | 4 |
| Nearside Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 4 |
| Front Steering movement excessively `notchy` with the wheel raised |2.2.1b| | 4 |
| Offside Front Direction indicator not working |1.5.1c| | 4 |
| Offside Direction indicator not working |1.5.1c| | 4 |
| Nearside Rear Direction indicator insecure |1.5.3b| | 4 |
| Nearside Front Direction indicator not working |1.5.1c| | 4 |
| Front wheel bearings are excessively rough |2.3.5b| | 4 |
| Brake hose damaged | 4 |
| Steering movement excessively stiff with the weight on the lower bearing |2.2.1a| | 4 |
| Centre Rear Rear position lamp does not illuminate immediately when it is switched on |1.1.3a| | 3 |
| Offside Front Shock absorber has a serious fluid leak |5.3.2 |b|| | 3 |
| Registration plate lamp issues | 3 |
| Nearside Front Handlebar handgrip not secure to handlebars. |2.1.1c| | 3 |
| Centre Rear Upper Rear reflector on motorcycle missing |1.4.1| | 3 |
| Exhaust mounting missing |7.1.1c| | 3 |
| Nearside Rear Direction indicator not working |1.5.1c| | 3 |
| Front Exhaust is leaking and excessively noisey |7.1.1b| | 3 |
| Rear Brake disc|s| friction surface contaminated by oil or grease |3.2.A1k| | 3 |
| Horn not working (7.7 (a) (ii)) | 3 |
| Rear position lamp missing |1.1.1a| | 3 |
| Nearside Direction indicators not working |1.5.1c| | 3 |
| Rear Roller brake test indicates excessive fluctuation of brake effort |3.3.A1d| | 3 |
| Handlebar deformed |2.1.1b| | 3 |
| Front Fairings insecure and likely to impede the steering |2.1.2e| | 3 |
| Rear Roller brake test indicates a binding brake |3.3.A1a| | 3 |
| Nearside Front Direction indicator insecure |1.5.3b| | 3 |
| Offside Front Direction indicator insecure |1.5.3b| | 3 |
| Rear Brake fluid reservoir fluid level dangerously low |3.2.B1d| | 3 |
| Front Headlamp at least one does not illuminate on dipped beam |1.2.2a|i|| | 3 |