| Most common failures | No# failures |
|---|
| Rear reflector on motorcycle missing |1.4.1| | 263 |
| Registration plate issues | 240 |
| Headlamp aim out of alignment | 155 |
| Registration plate lamp issues | 62 |
| Rear reflector missing (4.8.2 (a) (ii)) | 53 |
| 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| | 37 |
| Horn not working |1.7.3a| | 32 |
| Front Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 27 |
| Rear Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 26 |
| Rear Rear reflector on motorcycle missing |1.4.1| | 22 |
| Rear reflector missing |4.8.2 |a| |ii|| | 19 |
| Nearside Front shock absorber seal failed and leaking oil |2.3.3| | 18 |
| Front wheel bearings have excessive free play |2.3.5b| | 17 |
| Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 16 |
| Headlamp at least one does not illuminate on dipped beam |1.2.2a|i|| | 15 |
| Headlamp at least one does not illuminate on main beam |1.2.2a|ii|| | 14 |
| Offside Front shock absorber seal failed and leaking oil |2.3.3| | 11 |
| Drive chain excessively loose |6.2.1d| | 10 |
| Rear Stop lamp not working (4.3.1 (a) (ii)) | 10 |
| Horn not working (7.7 (a)) | 9 |
| Drive chain excessively tight |6.2.1d| | 9 |
| Rear Rear reflector missing (4.8.2 (a) (ii)) | 8 |
| Roller brake test The less effective brake control does not achieve an efficiency of 25% (1.2.2 (a) (i)) | 8 |
| Steering movement excessively `notchy` with the wheel raised |2.2.1b| | 8 |
| Offside Front Shock absorber has a serious fluid leak (5.3.2 (b)) | 8 |
| Front Front wheel bearings are excessively rough |2.3.5b| | 7 |
| Front shock absorber seal failed and leaking oil |2.3.3| | 7 |
| Headlamp not working on main beam (4.1.1 (a) (ii)) | 7 |
| Front Wheel bearing rough when rotated (5.1.3 (b) (i)) | 7 |
| Front Roller brake test indicates excessive fluctuation of brake effort |3.3.A1d| | 7 |
| Stop lamp remains on when the brakes are released | 7 |
| Horn not working (7.7 (a) (ii)) | 7 |
| Nearside Handlebar handgrip not secure to handlebars. |2.1.1c| | 6 |
| Horn not working |7.7 |a| |ii|| | 6 |
| Front Front wheel bearings have excessive free play |2.3.5b| | 6 |
| Headlamp not working on dipped beam (4.1.1 (a) (ii)) | 6 |
| Throttle operating incorrectly |6.2.1f| | 6 |
| Rear Stop lamp not working |4.3.1 |a| |ii|| | 6 |
| Front Stop lamp not working (4.3.1 (a) (ii)) | 5 |
| Front Valve stem seriously damaged (5.2.3 (j)) | 5 |
| Offside Front Front shock absorber seal failed and leaking oil |2.3.3| | 5 |
| Front wheel bearings are excessively rough |2.3.5b| | 5 |
| Nearside Front Front shock absorber seal failed and leaking oil |2.3.3| | 5 |
| Exhaust markings indicating not for road use or similar wording |7.1.4| | 5 |
| Steering movement excessively `notchy` with the weight on the lower bearing |2.2.1a| | 5 |
| Rear position lamp does not illuminate immediately when it is switched on |1.1.3a| | 5 |
| Centre Rear reflector on motorcycle missing |1.4.1| | 4 |
| Offside Front Shock absorber has a serious fluid leak |5.3.2 |b|| | 4 |
| Nearside Front Shock absorber has a serious fluid leak (5.3.2 (b)) | 4 |
| 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)) | 4 |
| Front Roller brake test indicates a binding brake |3.3.A1a| | 4 |
| Steering headbearing has excessive free play |2.2.2| | 4 |
| Riders seat insecure |6.2.1a| | 4 |
| Rear Valve stem seriously damaged (5.2.3 (j)) | 4 |