| Most common failures | No# failures |
|---|
| Headlamp aim out of alignment | 195 |
| Rear reflector on motorcycle missing |1.4.1| | 69 |
| Registration plate issues | 48 |
| Rear Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 20 |
| Rear Rear reflector on motorcycle missing |1.4.1| | 19 |
| Registration plate lamp issues | 16 |
| Front Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 14 |
| Throttle operating incorrectly |6.2.1f| | 13 |
| Headlamp at least one does not illuminate on main beam |1.2.2a|ii|| | 10 |
| Nearside Front shock absorber seal failed and leaking oil |2.3.3| | 10 |
| Headlamp at least one does not illuminate on dipped beam |1.2.2a|i|| | 10 |
| Rear reflector missing (4.8.2 (a) (ii)) | 9 |
| Drive chain excessively loose |6.2.1d| | 9 |
| 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| | 9 |
| Front position lamp does not illuminate immediately when switched on |1.1.3a| | 9 |
| Front Roller brake test indicates excessive fluctuation of brake effort |3.3.A1d| | 8 |
| Offside Front shock absorber seal failed and leaking oil |2.3.3| | 8 |
| Nearside Handlebar handgrip not secure to handlebars. |2.1.1c| | 7 |
| Headlamp not working on dipped beam (4.1.1 (a) (ii)) | 6 |
| Nearside Front Shock absorber has a serious fluid leak (5.3.2 (b)) | 6 |
| Steering movement excessively `notchy` with the wheel raised |2.2.1b| | 6 |
| Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 6 |
| Front Stop lamp not working (4.3.1 (a) (ii)) | 5 |
| Nearside Front Front shock absorber seal failed and leaking oil |2.3.3| | 5 |
| Front Brake indicates excessive fluctuation of brake effort (1.2.1 (e)) | 5 |
| Steering movement excessively `notchy` with the weight on the lower bearing |2.2.1a| | 4 |
| Rear Stop lamp not working (4.3.1 (a) (ii)) | 4 |
| Offside Front Shock absorber has a serious fluid leak (5.3.2 (b)) | 4 |
| Headlamp aim beam image kick up to the offside |1.6| | 4 |
| Horn not working |1.7.3a| | 4 |
| Nearside Front Shock absorber has a serious fluid leak |5.3.2 |b|| | 4 |
| Front Position lamp not working (4.2.1 (a)) | 4 |
| Headlamp aim not tested |1.6| | 4 |
| Headlamp not working on main beam (4.1.1 (a) (ii)) | 4 |
| Front Valve stem seriously damaged (5.2.3 (j)) | 4 |
| Rear Brake excessively binding (1.2.1 (f)) | 3 |
| Drive chain excessively tight |6.2.1d| | 3 |
| Rear Stop lamp not working |4.3.1 |a| |ii|| | 3 |
| Rear Valve stem seriously damaged |5.2.3 |j|| | 3 |
| Front Brake lever has insufficient reserve travel (1.1.2 (a)) | 3 |
| Rear Brake disc|s| cracked |3.2.A1g| | 3 |
| Nearside Front Direction indicators not working |1.5.1c| | 3 |
| Exhaust markings indicating not for road use or similar wording |7.1.4| | 3 |
| Throttle has a significant change in engine speed whilst moving the steering from lock to lock |2.1.4| | 3 |
| Offside Front Direction indicator not working (4.4.1 (a) (ii)) | 3 |
| Rear reflector missing |4.8.2 |a| |ii|| | 3 |
| Nearside Rear Direction indicators not working |1.5.1c| | 3 |
| Rear Valve stem seriously damaged (5.2.3 (j)) | 3 |
| Rear Stop lamp remains on when the brake is released |1.3.1e| | 3 |