| Most common failures | No# failures |
|---|
| Registration plate issues | 112 |
| Headlamp aim out of alignment | 97 |
| Rear reflector on motorcycle missing |1.4.1| | 73 |
| Rear reflector missing (4.8.2 (a) (ii)) | 29 |
| Registration plate lamp issues | 28 |
| Front Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 20 |
| Horn not working |1.7.3a| | 18 |
| Exhaust markings indicating not for road use or similar wording |7.1.4| | 17 |
| Rear Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 17 |
| Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 14 |
| Drive chain excessively loose |6.2.1d| | 10 |
| Headlamp at least one does not illuminate on dipped beam |1.2.2a|i|| | 10 |
| Headlamp not working on dipped beam (4.1.1 (a) (ii)) | 10 |
| Horn not working (7.7 (a) (ii)) | 10 |
| Nearside Front Shock absorber has a serious fluid leak (5.3.2 (b)) | 9 |
| Front Stop lamp not working (4.3.1 (a) (ii)) | 8 |
| Rear reflector missing |4.8.2 |a| |ii|| | 8 |
| Nearside Front Direction indicator not working (4.4.1 (a) (ii)) | 7 |
| Rear Rear reflector on motorcycle missing |1.4.1| | 7 |
| Front Brake lever has inadequate reserve travel |3.1.3b| | 6 |
| Rear position lamp does not illuminate immediately when it is switched on |1.1.3a| | 6 |
| Horn not working (7.7 (a)) | 6 |
| Rear Rear reflector missing (4.8.2 (a) (ii)) | 6 |
| Rear Brake excessively binding (1.2.1 (f)) | 5 |
| 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| | 5 |
| Offside Front Direction indicator not working |1.5.1c| | 5 |
| Stop lamp affected by the operation of another lamp |1.3.2| | 5 |
| Rear Exhaust markings indicating not for road use or similar wording |7.1.4| | 5 |
| Nearside Front Direction indicators not working |1.5.1c| | 5 |
| Offside Front Shock absorber has a serious fluid leak (5.3.2 (b)) | 4 |
| Rear Direction indicator obviously incorrectly positioned (4.4.3 (a)) | 4 |
| Drive chain excessively loose (6.1.7 (c) (i)) | 4 |
| Rear reflector on motorcycle missing (1.4.1) | 4 |
| Drive chain excessively tight (6.1.7 (k) (i)) | 4 |
| Rear position lamp adversely affected by the operation of another lamp |1.1.3b| | 4 |
| Roller brake test The less effective brake control does not achieve an efficiency of 25%. |3.3.A2b| | 4 |
| Front Stop lamp does not illuminate by the operation of both brake controls (4.3.2 (a) (iii)) | 4 |
| Wheel alignment incorrect which adversely affects the handling |2.5.1| | 4 |
| Rear Footrest missing |6.2.1a| | 4 |
| Horn not working |7.7 |a| |ii|| | 3 |
| All direction indicators not working (4.4.1 (a) (ii)) | 3 |
| Offside Front Front shock absorber seal failed and leaking oil |2.3.3| | 3 |
| Rear Footrest missing (6.2.12 (a)) | 3 |
| Headlamp aim beam image kick up to the offside |1.6| | 3 |
| Riders seat insecure |6.2.1a| | 3 |
| Nearside Rear Footrest missing (6.2.12 (a)) | 3 |
| Offside Rear Footrest missing (6.2.12 (a)) | 3 |
| Rear Brake has no recorded effort at a wheel (1.2.1 (a) (ii)) | 3 |
| Roller brake test The less effective brake control does not achieve an efficiency of 25% (1.2.2 (a) (i)) | 3 |
| Direction indicator flashing more than 120 times per minute |1.5.1c| | 3 |
| Nearside Front Headlamp at least one does not illuminate on dipped beam |1.2.2a|i|| | 3 |
| Front Headlamp at least one does not illuminate on dipped beam |1.2.2a|i|| | 3 |
| Steering damper ineffective |2.1.2d| | 3 |
| Offside Front Direction indicator not working (4.4.1 (a) (ii)) | 3 |
| Nearside Rear Footrest missing |6.2.1a| | 3 |
| Offside Rear Footrest missing |6.2.1a| | 3 |
| Rear Stop lamp not working (4.3.1 (a) (ii)) | 3 |
| 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)) | 3 |
| Drive chain excessively tight |6.2.1d| | 3 |