| Most common failures | No# failures |
|---|
| Headlamp aim out of alignment | 11 |
| Headlamp aim beam image kick up to the offside |1.6| | 8 |
| Direction indicators not working |1.5.1c| | 5 |
| Horn not working |1.7.3a| | 4 |
| Exhaust is leaking and excessively noisey |7.1.1b| | 4 |
| Registration plate issues | 3 |
| Front Headlamp aim beam image kick-up is to the offside |1.6.1| | 3 |
| Rear reflector on motorcycle obscured |1.4.1| | 3 |
| Horn not loud enough to be heard by another road user |1.7.3a| | 3 |
| Rear Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 3 |
| Rear Stop lamp not working (4.3.1 (a) (ii)) | 2 |
| Rear Brake lever has inadequate reserve travel |3.1.3b| | 2 |
| Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 2 |
| Rear reflector on motorcycle missing |1.4.1| | 2 |
| Front Fairings insecure and likely to impede the steering |2.1.2e| | 2 |
| Direction indicators affected by the operation of another lamp |1.5.1c| | 2 |
| Rear position lamp does not illuminate immediately when it is switched on |1.1.3a| | 2 |
| Steering headbearing has excessive free play |2.2.2| | 2 |
| Rear Roller brake test indicates excessive fluctuation of brake effort |3.3.A1d| | 2 |
| Offside Front Direction indicator not working |1.5.1c| | 2 |
| Rear Brake lever pivots excessively worn |3.1.3a| | 1 |
| Front Front position lamp insecure |1.1.1c| | 1 |
| Centre Motorcycle structure excessively damaged |6.1.1a| | 1 |
| Front Front mudguard insecure |2.3.7| | 1 |
| Nearside Front Brake hose leaking fluid |3.2.B4| | 1 |
| Rear Rear shock absorber has inadequate damping effect. |2.4.A.3b| | 1 |
| Stop lamp affected by the operation of another lamp |1.3.2| | 1 |
| Front Headlamp aim beam image kick up to the offside |1.6| | 1 |
| Headlamp at least one does not illuminate on dipped beam |1.2.2a|i|| | 1 |
| Front Steering movement excessively stiff with the wheel raised |2.2.1b| | 1 |
| Front Stop lamp remains on when the brake is released |1.3.1e| | 1 |
| Exhaust excessively deteriorated |7.1.1a| | 1 |
| Headlamp insecure |1.2.3b| | 1 |
| Offside Front Handlebar handgrip missing |2.1.1c| | 1 |
| Direction indicator not working |1.5.1c| | 1 |
| Throttle operating incorrectly |6.2.1f| | 1 |
| Steering movement excessively `notchy` with the wheel raised |2.2.1b| | 1 |
| Front Front suspension assembly component excessively bent |2.3.1| | 1 |
| Front Wheel alignment incorrect which adversely affects the handling |2.5.1| | 1 |
| Front position lamp adversely affected by the operation of another lamp |1.1.3b| | 1 |
| Front Floor brake test indicates a binding brake |3.3.C2c| | 1 |
| Front Brake disc|s| excessively scored |3.2.A1l| | 1 |
| Front Roller brake test indicates a binding brake |3.3.A1a| | 1 |
| Front Brake performance not tested |3.3| | 1 |
| Roller brake test The less effective brake control does not achieve an efficiency of 25%. |3.3.A2b| | 1 |
| Rear Wheel bearing has excessive play (5.1.3 (a) (i)) | 1 |
| Offside Front Direction indicators not working |1.5.1c| | 1 |
| Front wheel bearings are excessively rough |2.3.5b| | 1 |
| Front wheel bearings have excessive free play |2.3.5b| | 1 |
| Front Horn not working |1.7.3a| | 1 |
| Riders seat insecure |6.2.1a| | 1 |
| Front Brake lever is bent and the brake cannot be readily applied |3.1.3c| | 1 |
| Centre Rear Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 1 |
| Front Roller brake test indicates a sticking brake |3.3.A1a| | 1 |
| Headlamp at least one does not illuminate on main beam |1.2.2a|ii|| | 1 |
| Nearside Front Direction indicator not working |4.4.1 |a| |ii|| | 1 |
| Dipswitch does not operate immediately when selected on dipped beam (4.1.3 (b)) | 1 |
| Front Brake lever pivots excessively worn |3.1.3a| | 1 |
| Rear Brake lever insecure |3.1.2a| | 1 |
| Offside Rear Direction indicator not working |1.5.1c| | 1 |
| Rear Roller brake test indicates a severely grabbing brake |3.3.A1b| | 1 |