| Most common failures | No# failures |
|---|
| Registration plate issues | 27 |
| Rear reflector on motorcycle missing |1.4.1| | 19 |
| Headlamp aim out of alignment | 18 |
| Headlamp aim beam image kick up to the offside |1.6| | 7 |
| Rear position lamp does not illuminate immediately when it is switched on |1.1.3a| | 6 |
| Horn not working |1.7.3a| | 6 |
| Rear wheel bearings have excessive free play |2.4.A.2c| | 5 |
| Horn not loud enough to be heard by another road user |1.7.3a| | 4 |
| Rear Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 4 |
| 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 |
| Headlamp not working on dipped beam (4.1.1 (a) (ii)) | 3 |
| Rear reflector missing (4.8.2 (a) (ii)) | 3 |
| Rear Stop lamp not working (4.3.1 (a) (ii)) | 3 |
| Front Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 3 |
| Nearside Handlebar handgrip not secure to handlebars. |2.1.1c| | 3 |
| Rear reflector missing |4.8.2 |a| |ii|| | 3 |
| Offside Front shock absorber seal failed and leaking oil |2.3.3| | 3 |
| Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 3 |
| Rear Rear reflector on motorcycle missing |1.4.1| | 3 |
| Nearside Front Shock absorber has a serious fluid leak (5.3.2 (b)) | 3 |
| Headlamp at least one does not illuminate on main beam |1.2.2a|ii|| | 2 |
| Stop lamp remains on when the brakes are released | 2 |
| Headlamp at least one does not illuminate on dipped beam |1.2.2a|i|| | 2 |
| Rear suspension bush has excessive free play |2.4.A2a|i|| | 2 |
| All direction indicators missing (4.4.1 (a) (ii)) | 2 |
| Horn not working (7.7 (a) (ii)) | 2 |
| Rear Wheel bearing has excessive play (5.1.3 (a) (i)) | 2 |
| Drive chain excessively loose |6.2.1d| | 2 |
| Front Shock absorber has a serious fluid leak (5.3.2 (b)) | 2 |
| Steering movement excessively `notchy` with the wheel raised |2.2.1b| | 2 |
| Registration plate lamp issues | 2 |
| Headlamp aim beam image kick-up is to the offside |1.6.1| | 1 |
| Front Wheel bearing has excessive play |5.1.3 |a| |i|| | 1 |
| Front Roller brake test indicates a severely juddering brake |3.3.A1b| | 1 |
| Front position lamp does not illuminate immediately when switched on |1.1.3a| | 1 |
| Headlamp aim not tested |1.6| | 1 |
| Rear Wheel alignment incorrect which adversely affects the handling |2.5.1| | 1 |
| Brake lever insecure |3.1.2a| | 1 |
| Front Stop lamp not working (4.3.1 (a) (ii)) | 1 |
| Headlamp not working on main beam (4.1.1 (a) (ii)) | 1 |
| Exhaust is leaking and excessively noisey |7.1.1b| | 1 |
| Front Brake hose leaking (1.1.12 (c)) | 1 |
| Front Brake disc|s| has excessive run out |3.2.A1m| | 1 |
| Rear reflector on sidecar missing |1.4.1| | 1 |
| Offside Rear Direction indicators not working |1.5.1c| | 1 |
| Drive chain worn to excess |6.2.1e| | 1 |
| Rear Drive chain sprocket worn to excess |6.2.1e| | 1 |
| Front Drive chain sprocket worn to excess |6.2.1e| | 1 |
| Rear Rear position lamp does not illuminate immediately when it is switched on |1.1.3a| | 1 |
| Rear Stop lamp does not illuminate immediately a brake applies switch wiring on rear brake |1.3.1a| | 1 |
| Roller brake test The less effective brake control does not achieve an efficiency of 25%. |3.3.A2b| | 1 |
| Nearside Front shock absorber seal failed and leaking oil |2.3.3| | 1 |
| Stop lamp light intensity significantly reduced (4.3.3 (a) (ii)) | 1 |
| Rear Position lamp adversely affected by the operation of another lamp (4.2.3 (b)) | 1 |
| Front Wheel bearing play so excessive it is likely to break up (5.1.3 (a) (ii)) | 1 |
| Rear Wheel bearing play so excessive it is likely to break up (5.1.3 (a) (ii)) | 1 |
| Front Wheel bearing rough when rotated (5.1.3 (b) (i)) | 1 |
| Front wheel bearings have excessive free play |2.3.5b| | 1 |
| Drive chain horseshoe locking device incorrectly fitted (6.1.7 (j) (i)) | 1 |
| Rear Rear wheel bearings have excessive free play |2.4.A.2c| | 1 |
| Steering headbearing has excessive free play |2.2.2| | 1 |
| Front wheel bearings are excessively rough |2.3.5b| | 1 |
| Rear Rear reflector missing (4.8.2 (a) (ii)) | 1 |
| Front Brake excessively binding (1.2.1 (f)) | 1 |
| Rear Lower Shock absorber has an excessively worn bush (5.3.2 (c)) | 1 |
| Steering movement excessively stiff with the weight on the lower bearing |2.2.1a| | 1 |
| Horn sound not in accordance with requirements (7.7 (c)) | 1 |
| Throttle operating incorrectly |6.2.1f| | 1 |
| Roller brake test Neither brake control achieves an efficiency of 25% (1.2.2 (a) (i)) | 1 |
| Steering movement excessively `notchy` with the weight on the lower bearing |2.2.1a| | 1 |
| Stop lamp remains on when the brake is released |1.3.1e| | 1 |
| Front Stop lamp remains on when the brake is released |1.3.1e| | 1 |
| Offside Handlebar handgrip not secure to handlebars. |2.1.1c| | 1 |
| Stop lamp not working (4.3.1 (a) (ii)) | 1 |
| Rear Position lamp not working (4.2.1 (a)) | 1 |
| Fuel system component leaking |7.2.1a| | 1 |
| Front Shock absorber has negligible damping effect (5.3.2 (b)) | 1 |
| Brake performance not tested (1.2.1 (g)) | 1 |
| Front Stop lamp not working |4.3.1 |a| |ii|| | 1 |
| Steering movement excessively stiff with the wheel raised |2.2.1b| | 1 |
| Horn missing |1.7.1| | 1 |
| Rear Lower Shock absorber insecurely attached (5.3.2 (a) (i)) | 1 |