| Most common failures | No# failures |
|---|
| Rear reflector on motorcycle missing |1.4.1| | 93 |
| Registration plate issues | 69 |
| Headlamp aim out of alignment | 49 |
| Rear reflector missing (4.8.2 (a) (ii)) | 20 |
| Drive chain excessively loose |6.2.1d| | 13 |
| Rear reflector missing |4.8.2 |a| |ii|| | 11 |
| Roller brake test The less effective brake control does not achieve an efficiency of 25%. |3.3.A2b| | 10 |
| Rear Rear reflector on motorcycle missing |1.4.1| | 8 |
| Nearside Front shock absorber seal failed and leaking oil |2.3.3| | 6 |
| Registration plate lamp issues | 6 |
| Front Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 5 |
| Horn not working |1.7.3a| | 5 |
| Steering movement excessively `notchy` with the wheel raised |2.2.1b| | 5 |
| Offside Front shock absorber seal failed and leaking oil |2.3.3| | 5 |
| Nearside Front Shock absorber has a serious fluid leak (5.3.2 (b)) | 4 |
| Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 4 |
| Drive chain worn to excess |6.2.1e| | 4 |
| Rear Rear reflector missing (4.8.2 (a) (ii)) | 3 |
| Drive chain excessively loose (6.1.7 (c) (i)) | 3 |
| Roller brake test The less effective brake control does not achieve an efficiency of 25% (1.2.2 (a) (i)) | 3 |
| 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| | 3 |
| Rear wheel bearings have excessive free play |2.4.A.2c| | 3 |
| Front Brake disc|s| insecure |3.2.A1g| | 3 |
| Riders seat insecure |6.2.1a| | 3 |
| Headlamp at least one does not illuminate on dipped beam |1.2.2a|i|| | 3 |
| Horn not loud enough to be heard by another road user |1.7.3a| | 2 |
| Exhaust has part of the system missing |7.1.1a| | 2 |
| Drive chain excessively tight |6.2.1d| | 2 |
| Steering headbearing has excessive free play |2.2.2| | 2 |
| Front Steering movement excessively `notchy` with the weight on the lower bearing |2.2.1a| | 2 |
| Front Wheel bearing has excessive play (5.1.3 (a) (i)) | 2 |
| Front position lamp does not illuminate immediately when switched on |1.1.3a| | 2 |
| Headlamp not working on dipped beam (4.1.1 (a) (ii)) | 2 |
| Riders seat insecure (6.2.5 (a) (ii)) | 2 |
| Centre Rear Rear reflector on motorcycle missing |1.4.1| | 2 |
| Steering movement excessively `notchy` with the weight on the lower bearing |2.2.1a| | 2 |
| Rear Brake pedal has inadequate reserve travel |3.1.3b| | 2 |
| Rear Position lamp not working (4.2.1 (a)) | 2 |
| Rear Hydraulic brake control feels spongy |3.1.4a| | 2 |
| Rear Roller brake test indicates a binding brake |3.3.A1a| | 2 |
| Throttle operating incorrectly |6.2.1f| | 2 |
| Steering movement excessively stiff with the wheel raised |2.2.1b| | 2 |
| Rear Brake master cylinder leaking (1.1.10 (b) (ii)) | 2 |
| Rear Roller brake test indicates brake effort fall disproportional to brake lever or pedal effort |3.3.A1c| | 2 |
| Roller brake test The less effective brake control does not achieve an efficiency of 25% |1.2.2 |a| |i|| | 2 |
| Nearside Front Direction indicators not working |1.5.1c| | 2 |