| Most common failures | No# failures |
|---|
| Registration plate issues | 56 |
| Headlamp aim out of alignment | 44 |
| Rear position lamp does not illuminate immediately when it is switched on |1.1.3a| | 30 |
| Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 24 |
| Rear Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 20 |
| Front Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 18 |
| Horn not working |1.7.3a| | 15 |
| Drive chain excessively loose |6.2.1d| | 13 |
| Headlamp at least one does not illuminate on dipped beam |1.2.2a|i|| | 12 |
| Front Brake excessively binding (1.2.1 (f)) | 11 |
| Front Roller brake test indicates excessive fluctuation of brake effort |3.3.A1d| | 10 |
| Rear reflector on motorcycle missing |1.4.1| | 9 |
| Stop lamp not working (4.3.1 (a) (ii)) | 9 |
| Rear Position lamp not working (4.2.1 (a)) | 8 |
| Rear Position lamp not working |4.2.1 |a|| | 6 |
| Front Brake lever has inadequate reserve travel |3.1.3b| | 6 |
| Front Roller brake test indicates a binding brake |3.3.A1a| | 6 |
| Stop lamp remains on when the brakes are released | 6 |
| Rear reflector missing (4.8.2 (a) (ii)) | 6 |
| Rear Stop lamp not working (4.3.1 (a) (ii)) | 6 |
| Stop lamp does not illuminate by the operation of both brake controls (4.3.2 (a) (iii)) | 6 |
| Nearside Handlebar handgrip not secure to handlebars. |2.1.1c| | 5 |
| Wheel alignment incorrect which adversely affects the handling |2.5.1| | 5 |
| Drive chain worn to excess |6.2.1e| | 5 |
| Stop lamp not working |4.3.1 |a| |ii|| | 5 |
| Drive chain excessively loose |6.1.7 |c| |i|| | 5 |
| Front Position lamp not working (4.2.1 (a)) | 5 |
| Rear position lamp insecure |1.1.1c| | 4 |
| Rear Drive chain sprocket worn to excess |6.2.1e| | 4 |
| Direction indicators not working |1.5.1c| | 4 |
| Wheel alignment incorrect which adversely affects the steering |2.5.1| | 4 |
| Nearside Front Footrest insecure |6.2.1a| | 4 |
| Stop lamp remains on when the brake is released |1.3.1e| | 4 |
| Front Stop lamp remains on when the brake is released |1.3.1e| | 4 |
| Rear position lamp adversely affected by the operation of another lamp |1.1.3b| | 4 |
| Rear Rear position lamp does not illuminate immediately when it is switched on |1.1.3a| | 4 |
| Horn not working (7.7 (a)) | 4 |
| Nearside Rear Footrest missing |6.2.1a| | 3 |
| Front Roller brake test indicates a severely grabbing brake |3.3.A1b| | 3 |
| Headlamp aim beam image kick up to the offside |1.6| | 3 |
| Headlamp at least one does not illuminate on main beam |1.2.2a|ii|| | 3 |
| Front Brake excessively binding |1.2.1 |f|| | 3 |
| Front position lamp does not illuminate immediately when switched on |1.1.3a| | 3 |
| Front Stop lamp not working (4.3.1 (a) (ii)) | 3 |
| Offside Rear Direction indicator not working (4.4.1 (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| | 2 |
| Offside Front Direction indicator not working |1.5.1c| | 2 |
| Rear Roller brake test indicates a severely grabbing brake |3.3.A1b| | 2 |
| Stop lamp affected by the operation of another lamp |1.3.2| | 2 |
| Brake pedal has inadequate reserve travel |3.1.3b| | 2 |
| Nearside Front Front shock absorber seal failed and leaking oil |2.3.3| | 2 |
| Fuel hose leaking |7.2.1a| | 2 |
| Front Sidecar direction indicator not working |1.5.1c| | 2 |
| Sidecar front position lamp does not illuminate immediately when it is switched on |1.1.3a| | 2 |
| Sidecar rear position lamp does not illuminate immediately when it is switched on |1.1.3a| | 2 |
| Throttle operating incorrectly |6.2.1f| | 2 |
| Offside Front Direction indicators not working |1.5.1c| | 2 |
| Chain guard insecure |6.2.1c| | 2 |
| Offside Footrest insecure |6.2.1a| | 2 |
| Nearside Rear Direction indicator not working |1.5.1c| | 2 |
| Offside Front Footrest insecure |6.2.1a| | 2 |
| Fuel cap sealing washer deteriorated |7.2.2c| | 2 |
| Rear wheel spindle securing nut locking device missing |2.4.A.2b| | 2 |
| All direction indicators not working |4.4.1 |a| |ii|| | 2 |
| Offside Rear Footrest missing |6.2.1a| | 2 |
| Rear position lamp damaged and function impaired |1.1.1b| | 2 |
| Direction indicator flashing more than 120 times per minute |1.5.1c| | 2 |
| Throttle has a significant change in engine speed whilst moving the steering from lock to lock |2.1.4| | 2 |
| Headlamp not working on dipped beam |4.1.1 |a| |ii|| | 2 |
| Headlamp not working on main beam |4.1.1 |a| |ii|| | 2 |
| Front position lamp incorrect colour |1.1.2a| | 2 |
| Horn not loud enough to be heard by another road user |1.7.3a| | 2 |
| Steering headbearing has excessive free play |2.2.2| | 2 |
| Direction indicator missing |1.5.1a| | 2 |
| Nearside Front position lamp does not illuminate immediately when switched on |1.1.3a| | 2 |
| Indicator switch insecure |1.5.4| | 2 |
| Front Footrest insecure |6.2.12 |a|| | 2 |
| Stop lamp deteriorated and function impaired |1.3.3a| | 2 |
| Rear Roller brake test indicates a sticking brake |3.3.A1a| | 2 |
| Nearside Footrest insecure |6.2.1a| | 2 |
| Nearside Front Direction indicators not working |1.5.1c| | 2 |
| Horn not working |7.7 |a| |ii|| | 2 |
| Registration plate lamp issues | 2 |
| Rear suspension bush has excessive free play |2.4.A2a|i|| | 2 |
| Sidecar wheel bearings have excessive free play |5.2.3c| | 2 |
| All direction indicators missing (4.4.1 (a) (ii)) | 2 |
| Horn not working (7.7 (a) (ii)) | 2 |
| Nearside Rear Direction indicator not working (4.4.1 (a) (ii)) | 2 |
| Roller brake test The less effective brake control does not achieve an efficiency of 25% (1.2.2 (a) (i)) | 2 |
| Front Headlamp not working on main beam (4.1.1 (a) (ii)) | 2 |
| Throttle operating incorrectly (6.2.7 (a) (i)) | 2 |