| Most common failures | No# failures |
|---|
| Headlamp aim out of alignment | 172 |
| Rear reflector on motorcycle missing |1.4.1| | 59 |
| Registration plate issues | 48 |
| Steering movement excessively `notchy` with the wheel raised |2.2.1b| | 46 |
| Front Roller brake test indicates a binding brake |3.3.A1a| | 41 |
| Rear Wheel spoke excessively loose |4.2.1b| | 37 |
| Exhaust is leaking and excessively noisey |7.1.1b| | 34 |
| Horn not working |1.7.3a| | 33 |
| Headlamp aim beam image kick up to the offside |1.6| | 23 |
| Steering movement excessively `notchy` with the weight on the lower bearing |2.2.1a| | 17 |
| Rear Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 16 |
| 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| | 13 |
| Nearside Handlebar handgrip not secure to handlebars. |2.1.1c| | 13 |
| Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 12 |
| Front Floor brake test indicates a binding brake |3.3.C2c| | 11 |
| Front Roller brake test indicates excessive fluctuation of brake effort |3.3.A1d| | 11 |
| Front Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 10 |
| Steering headbearing has excessive free play |2.2.2| | 10 |
| Nearside Front shock absorber seal failed and leaking oil |2.3.3| | 10 |
| Rear Rear reflector on motorcycle missing |1.4.1| | 10 |
| Rear suspension bush has excessive free play |2.4.A2a|i|| | 10 |
| Headlamp at least one does not illuminate on dipped beam |1.2.2a|i|| | 10 |
| Rear reflector missing (4.8.2 (a) (ii)) | 10 |
| Front wheel bearings have excessive free play |2.3.5b| | 8 |
| Rear suspension bearing has excessive free play |2.4.A2a|i|| | 8 |
| Rear position lamp does not illuminate immediately when it is switched on |1.1.3a| | 8 |
| Offside Front shock absorber seal failed and leaking oil |2.3.3| | 8 |
| Throttle operating incorrectly |6.2.1f| | 8 |
| Exhaust excessively deteriorated |7.1.1a| | 7 |
| Front Steering movement excessively `notchy` with the wheel raised |2.2.1b| | 7 |
| Front Horn not working |1.7.3a| | 7 |
| Offside Rear Direction indicator not working |1.5.1c| | 7 |
| Steering headbearing excessively stiff or notchy (2.2.2 (f) (i)) | 7 |
| Front position lamp does not illuminate immediately when switched on |1.1.3a| | 6 |
| Front Wheel spoke excessively loose |4.2.1b| | 6 |
| Exhaust noise is clearly in excess of that emitted by a similar motorcycle fitted with a standard silencer in average condition |8.1.1 |a|| | 6 |
| Front Brake excessively binding (1.2.1 (f)) | 6 |
| Horn not loud enough to be heard by another road user |1.7.3a| | 5 |
| Rear wheel spindle securing nut locking device missing |2.4.A.2b| | 5 |
| Nearside Rear Direction indicator not working |1.5.1c| | 5 |
| Rear Rear suspension bush has excessive free play |2.4.A2a|i|| | 5 |
| Front Brake excessively binding |1.2.1 |f|| | 5 |
| Front Brake lever has inadequate reserve travel |3.1.3b| | 5 |
| Horn not working (7.7 (a) (ii)) | 5 |
| Riders seat insecure |6.2.1a| | 4 |
| Steering movement excessively stiff with the weight on the lower bearing |2.2.1a| | 4 |
| Front Brake lever cannot be applied smoothly |3.1.3d| | 4 |
| Rear Exhaust excessively deteriorated |7.1.1a| | 4 |
| Rear Wheel spoke cracked. |4.2.1b| | 4 |
| Front Brake fluid reservoir fluid level dangerously low |3.2.B1d| | 4 |
| Rear reflector missing |4.8.2 |a| |ii|| | 4 |
| Offside Front Front shock absorber seal failed and leaking oil |2.3.3| | 4 |
| Front Wheel has an excessively distorted bead rim. |4.2.2| | 4 |
| Roller brake test The less effective brake control does not achieve an efficiency of 25%. |3.3.A2b| | 4 |
| Offside Rear Direction indicator not working (4.4.1 (a) (ii)) | 4 |
| Offside Rear Direction indicator insecure |1.5.3b| | 3 |
| Nearside Handlebar grip insecure to handlebar |2.2.1 |d| |ii|| | 3 |
| Stop lamp remains on when the brake is released |1.3.1e| | 3 |
| Front Steering movement excessively `notchy` with the weight on the lower bearing |2.2.1a| | 3 |
| Steering movement excessively stiff with the wheel raised |2.2.1b| | 3 |
| Front Brake disc|s| has excessive run out |3.2.A1m| | 3 |
| Rear Roller brake test indicates excessive fluctuation of brake effort |3.3.A1d| | 3 |
| Headlamp insecure |1.2.3b| | 3 |
| Horn not working |7.7 |a| |ii|| | 3 |
| Headlamp at least one does not illuminate on main beam |1.2.2a|ii|| | 3 |
| Rear Exhaust is leaking and excessively noisey |7.1.1b| | 3 |
| Front Front wheel bearings are excessively rough |2.3.5b| | 3 |
| Nearside Rear Direction indicator insecure |1.5.3b| | 3 |
| Front Brake component has restricted free movement and operation is likely to be impeded |3.2.A1h| | 3 |
| Nearside Front Direction indicators not working |1.5.1c| | 3 |
| Nearside Front Handlebar handgrip not secure to handlebars. |2.1.1c| | 3 |
| Offside Front Direction indicators not working |1.5.1c| | 3 |
| Rear wheel spindle securing nut|s| loose |2.4.A.2b| | 3 |
| Nearside Rear shock absorber seal failed and leaking oil |2.4.A.1c| | 3 |
| Nearside Front Front shock absorber seal failed and leaking oil |2.3.3| | 3 |
| Horn sounds harsh or grating |1.7.3c| | 3 |
| Front Headlamp aim beam image kick up to the offside |1.6| | 3 |