| Most common failures | No# failures |
|---|
| Rear reflector on motorcycle missing |1.4.1| | 84 |
| Registration plate issues | 72 |
| Headlamp aim out of alignment | 55 |
| Front Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 28 |
| Rear position lamp does not illuminate immediately when it is switched on |1.1.3a| | 23 |
| Rear Rear reflector on motorcycle missing |1.4.1| | 19 |
| Front position lamp does not illuminate immediately when switched on |1.1.3a| | 15 |
| Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 14 |
| Registration plate lamp issues | 11 |
| Throttle has a significant change in engine speed whilst moving the steering from lock to lock |2.1.4| | 10 |
| Drive chain excessively loose |6.2.1d| | 10 |
| Nearside Front Direction indicator not working |1.5.1c| | 7 |
| Nearside Rear Direction indicators not working |1.5.1c| | 7 |
| 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| | 7 |
| Offside Front Direction indicator not working |1.5.1c| | 6 |
| Rear Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 6 |
| Rear reflector missing (4.8.2 (a) (ii)) | 6 |
| Rear Footrest missing |6.2.1a| | 6 |
| Rear Roller brake test indicates excessive fluctuation of brake effort |3.3.A1d| | 5 |
| Nearside Handlebar handgrip not secure to handlebars. |2.1.1c| | 5 |
| Stop lamp remains on when the brakes are released | 5 |
| Exhaust markings indicating not for road use or similar wording |7.1.4| | 5 |
| Roller brake test The less effective brake control does not achieve an efficiency of 25%. |3.3.A2b| | 4 |
| Rear Rear position lamp does not illuminate immediately when it is switched on |1.1.3a| | 4 |
| Headlamp aim beam image kick up to the offside |1.6| | 4 |
| Rear reflector missing |4.8.2 |a| |ii|| | 4 |
| Nearside Rear Direction indicator not working |1.5.1c| | 4 |
| Offside Rear Direction indicator not working |1.5.1c| | 4 |
| Front Headlamp aim beam image kick up to the offside |1.6| | 3 |
| Rear Position lamp not working (4.2.1 (a)) | 3 |
| Front Position lamp not working (4.2.1 (a)) | 3 |
| Steering movement excessively `notchy` with the wheel raised |2.2.1b| | 3 |
| Centre Rear reflector on motorcycle missing |1.4.1| | 3 |
| Rear reflector on motorcycle incorrectly positioned |1.4.2d| | 3 |
| Stop lamp affected by the operation of another lamp |1.3.2| | 3 |
| Rear Drive chain sprocket worn to excess |6.2.1e| | 3 |
| Headlamp at least one does not illuminate on dipped beam |1.2.2a|i|| | 3 |
| Front Roller brake test indicates a binding brake |3.3.A1a| | 3 |
| Nearside Front Direction indicator not working (4.4.1 (a) (ii)) | 2 |
| Exhaust mounting does not fully support the exhaust system |7.1.1.c| | 2 |
| Steering headbearing has excessive free play |2.2.2| | 2 |
| Nearside Rear Footrest missing |6.2.1a| | 2 |
| Front Stop lamp remains on when the brake is released |1.3.1e| | 2 |
| Rear Exhaust markings indicating not for road use or similar wording |7.1.4| | 2 |
| Offside Front shock absorber seal failed and leaking oil |2.3.3| | 2 |
| Rear suspension bush has excessive free play |2.4.A2a|i|| | 2 |
| Horn not working |1.7.3a| | 2 |
| Rear position lamp missing |1.1.1a| | 2 |
| Drive chain worn to excess |6.2.1e| | 2 |
| Front Stop lamp missing |1.3.3a| | 2 |
| Nearside Front Direction indicators not working |1.5.1c| | 2 |
| Stop lamp remains on when the brake is released |1.3.1e| | 2 |
| Rear position lamp adversely affected by the operation of another lamp |1.1.3b| | 2 |
| Rear Position lamp not working |4.2.1 |a|| | 2 |
| Front Floor brake test indicates a binding brake |3.3.C2c| | 2 |
| Nearside Front shock absorber seal failed and leaking oil |2.3.3| | 2 |
| Rear Hydraulic brake control feels spongy |3.1.4a| | 2 |
| Rear Rear reflector missing (4.8.2 (a) (ii)) | 2 |
| Rear Direction indicators affected by the operation of another lamp |1.5.1c| | 2 |
| Rear Rear position lamp adversely affected by the operation of another lamp |1.1.3b| | 2 |
| Headlamp not working on dipped beam (4.1.1 (a) (ii)) | 2 |
| Front Roller brake test indicates excessive fluctuation of brake effort |3.3.A1d| | 2 |