| Most common failures | No# failures |
|---|
| Headlamp aim out of alignment | 47 |
| Rear reflector on motorcycle missing |1.4.1| | 43 |
| Registration plate issues | 32 |
| Front Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 28 |
| Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 17 |
| Rear Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 14 |
| Drive chain excessively loose |6.2.1d| | 13 |
| Rear Rear reflector on motorcycle missing |1.4.1| | 11 |
| Rear position lamp does not illuminate immediately when it is switched on |1.1.3a| | 11 |
| Registration plate lamp issues | 10 |
| Steering headbearing has excessive free play |2.2.2| | 9 |
| Indicator switch insecure |1.5.4| | 7 |
| Rear wheel bearings have excessive free play |2.4.A.2c| | 7 |
| Horn not working |1.7.3a| | 7 |
| Stop lamp remains on when the brake is released |1.3.1e| | 7 |
| Rear Brake excessively binding (1.2.1 (f)) | 6 |
| Rear Roller brake test indicates a binding brake |3.3.A1a| | 6 |
| Front wheel bearings are excessively rough |2.3.5b| | 6 |
| Rear reflector missing (4.8.2 (a) (ii)) | 5 |
| Front Roller brake test indicates excessive fluctuation of brake effort |3.3.A1d| | 5 |
| Front wheel bearings have excessive free play |2.3.5b| | 5 |
| Rear shock absorber has inadequate damping effect. |2.4.A.3b| | 5 |
| Front Wheel bearing rough when rotated (5.1.3 (b) (i)) | 4 |
| Stop lamp remains on when the brakes are released | 4 |
| Front position lamp does not illuminate immediately when switched on |1.1.3a| | 4 |
| Drive chain worn to excess |6.2.1e| | 4 |
| Rear Stop lamp remains on when the brake is released |1.3.1e| | 4 |
| Rear Position lamp not working (4.2.1 (a)) | 4 |
| Rear reflector on motorcycle missing (1.4.1) | 3 |
| Rear Rear reflector missing (4.8.2 (a) (ii)) | 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 |
| Handlebar mounting clamp loose |2.1.1a| | 3 |
| Steering movement excessively `notchy` with the wheel raised |2.2.1b| | 3 |
| Front Brake disc|s| has excessive run out |3.2.A1m| | 3 |
| Roller brake test The less effective brake control does not achieve an efficiency of 25%. |3.3.A2b| | 3 |
| Headlamp aim beam image kick up to the offside |1.6| | 3 |
| Throttle has a significant change in engine speed whilst moving the steering from lock to lock |2.1.4| | 3 |
| Drive chain excessively tight |6.2.1d| | 3 |
| Offside Steering lock stop ineffective |2.1.3| | 3 |
| Rear Brake disc|s| excessively worn |3.2.A1l| | 3 |
| Offside Rear Direction indicators not working |1.5.1c| | 3 |
| Steering headbearing has excessive free play (2.2.2) | 2 |
| Nearside Front Direction indicator not working (4.4.1 (a) (ii)) | 2 |
| Rear position lamp adversely affected by the operation of another lamp |1.1.3b| | 2 |
| Handlebar deformed |2.1.1b| | 2 |
| Rear Stop lamp not working (4.3.1 (a) (ii)) | 2 |
| Rear reflector missing |4.8.2 |a| |ii|| | 2 |
| Wheel alignment incorrect which adversely affects the steering |2.5.1| | 2 |
| Rear Brake pedal has inadequate reserve travel |3.1.3b| | 2 |
| Front Wheel bearing so rough it is likely to overheat or break up (5.1.3 (b) (ii)) | 2 |
| Riders seat insecure |6.2.1a| | 2 |
| Rear Roller brake test indicates a sticking brake |3.3.A1a| | 2 |
| Front Roller brake test indicates a binding brake |3.3.A1a| | 2 |
| Rear Footrest missing |6.2.1a| | 2 |
| Nearside Steering lock stop ineffective |2.1.3| | 2 |
| Exhaust is leaking and excessively noisey |7.1.1b| | 2 |
| Front Brake indicates excessive fluctuation of brake effort (1.2.1 (e)) | 2 |
| Direction indicator not working |1.5.1c| | 2 |
| Direction indicator insecure |1.5.3b| | 2 |
| Nearside Rear All direction indicators not working (4.4.1 (a) (ii)) | 2 |
| Offside Front Direction indicator not working (4.4.1 (a) (ii)) | 2 |
| Nearside Handlebar handgrip not secure to handlebars. |2.1.1c| | 2 |
| Headlamp at least one does not illuminate on dipped beam |1.2.2a|i|| | 2 |
| Nearside Rear Direction indicator not working |1.5.1c| | 2 |
| Offside Rear Direction indicator not working |1.5.1c| | 2 |
| Rear Stop lamp not working |4.3.1 |a| |ii|| | 2 |
| Rear Rear shock absorber seal failed and leaking oil |2.4.A.1c| | 2 |
| Upper Rear suspension bush has excessive free play |2.4.A2a|i|| | 2 |
| Rear Roller brake test indicates excessive fluctuation of brake effort |3.3.A1d| | 2 |
| An item not tested |Manual| | 2 |