| Most common failures | No# failures |
|---|
| Headlamp aim out of alignment | 16 |
| Rear reflector on motorcycle missing |1.4.1| | 15 |
| Front Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 13 |
| Registration plate issues | 10 |
| Headlamp at least one does not illuminate on dipped beam |1.2.2a|i|| | 6 |
| Rear reflector missing (4.8.2 (a) (ii)) | 6 |
| Nearside Rear Footrest missing |6.2.1a| | 4 |
| Offside Rear Footrest missing |6.2.1a| | 4 |
| Front wheel bearings have excessive free play |2.3.5b| | 4 |
| Front wheel bearings are excessively rough |2.3.5b| | 4 |
| Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 4 |
| Steering movement excessively `notchy` with the wheel raised |2.2.1b| | 3 |
| Headlamp not working on main beam (4.1.1 (a) (ii)) | 3 |
| Offside Rear Direction indicators not working |1.5.1c| | 2 |
| Rear Footrest missing |6.2.1a| | 2 |
| Offside Direction indicator flashing more than 120 times per minute |1.5.1c| | 2 |
| Throttle operating incorrectly |6.2.1f| | 2 |
| Stop lamp not working (4.3.1 (a) (ii)) | 1 |
| Throttle control functioning such that safe operation of the motorcycle is adversely affected (6.2.7 (a) (ii)) | 1 |
| Front Headlamp not working on dipped beam (4.1.1 (a) (ii)) | 1 |
| Rear reflector on motorcycle incorrectly positioned |1.4.2d| | 1 |
| Stop lamp switch with a delay in operation Control 1 (4.3.2 (a) (ii)) | 1 |
| Horn not working (7.7 (a) (ii)) | 1 |
| Offside Front Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 1 |
| Nearside Front Direction indicators not working |1.5.1c| | 1 |
| Offside 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| | 1 |
| Nearside Rear Wheel alignment incorrect which adversely affects the steering |2.5.1| | 1 |
| Rear Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 1 |
| Rear position lamp does not illuminate immediately when it is switched on |1.1.3a| | 1 |
| Stop lamp does not illuminate immediately a brake applies foot brake |1.3.1a| | 1 |
| Rear reflector missing |4.8.2 |a| |ii|| | 1 |
| Front Roller brake test indicates a severely juddering brake |3.3.A1b| | 1 |
| Front Front wheel bearings are excessively rough |2.3.5b| | 1 |
| Rear wheel spindle securing nut locking device missing |2.4.A.2b| | 1 |
| Front Wheel bearing rough when rotated (5.1.3 (b) (i)) | 1 |
| Headlamp aim not tested (4.1.2 (b)) | 1 |
| Front Stop lamp not working |4.3.1 |a| |ii|| | 1 |
| Headlamp not working on dipped beam (4.1.1 (a) (ii)) | 1 |
| Rear Position lamp not working |4.2.1 |a|| | 1 |
| Stop lamp not working |4.3.1 |a| |ii|| | 1 |
| Front Brake lever cannot be applied smoothly |3.1.3d| | 1 |
| Registration plate lamp issues | 1 |
| Nearside Rear Direction indicator not working (4.4.1 (a) (ii)) | 1 |
| Front Brake indicates excessive fluctuation of brake effort (1.2.1 (e)) | 1 |
| Stop lamp does not illuminate by the operation of both brake controls Rear stop light not working from front brake lever (4.3.2 (a) (iii)) | 1 |
| Nearside Direction indicator flashing more than 120 times per minute |1.5.1c| | 1 |
| Front Brake disc|s| has excessive run out |3.2.A1m| | 1 |
| Front Roller brake test indicates excessive fluctuation of brake effort |3.3.A1d| | 1 |
| Rear Roller brake test indicates a binding brake |3.3.A1a| | 1 |
| Front Front position lamp does not illuminate immediately when switched on |1.1.3a| | 1 |
| Front Front wheel bearings have excessive free play |2.3.5b| | 1 |
| Steering movement excessively stiff with the wheel raised |2.2.1b| | 1 |
| Nearside Direction indicator not working |1.5.1c| | 1 |
| Rear wheel bearings have excessive free play |2.4.A.2c| | 1 |
| Steering movement excessively `notchy` with the weight on the lower bearing |2.2.1a| | 1 |
| Front Front shock absorber seal failed and leaking oil |2.3.3| | 1 |
| Indicator switch insecure |1.5.4| | 1 |
| Nearside Rear Direction indicator insecure |1.5.3b| | 1 |
| Front Brake disc|s| is excessively distorted |3.2.A1m| | 1 |
| Wheel alignment incorrect which adversely affects the steering |2.5.1| | 1 |
| Rear Wheel bearing play so excessive it is likely to break up (5.1.3 (a) (ii)) | 1 |