| Most common failures | No# failures |
|---|
| Rear reflector on motorcycle missing |1.4.1| | 9 |
| Headlamp aim out of alignment | 6 |
| Rear wheel bearings have excessive free play |2.4.A.2c| | 5 |
| Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 4 |
| Registration plate issues | 3 |
| Rear Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 3 |
| Horn not working |1.7.3a| | 2 |
| Drive chain excessively loose |6.2.1d| | 2 |
| Offside Front shock absorber seal failed and leaking oil |2.3.3| | 2 |
| Headlamp at least one does not illuminate on dipped beam |1.2.2a|i|| | 2 |
| Rear position lamp does not illuminate immediately when it is switched on |1.1.3a| | 2 |
| Front wheel bearings have excessive free play |2.3.5b| | 2 |
| Rear wheel spindle securing nut locking device missing |2.4.A.2b| | 2 |
| Rear Roller brake test indicates a binding brake |3.3.A1a| | 2 |
| Front Wheel spoke excessively loose |4.2.1b| | 1 |
| Rear reflector missing |4.8.2 |a| |ii|| | 1 |
| Headlamp at least one does not illuminate on main beam |1.2.2a|ii|| | 1 |
| Front Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 1 |
| Throttle has a significant change in engine speed whilst moving the steering from lock to lock |2.1.4| | 1 |
| Front position lamp does not illuminate immediately when switched on |1.1.3a| | 1 |
| Rear reflector missing (4.8.2 (a) (ii)) | 1 |
| Centre Rear Rear reflector on motorcycle missing |1.4.1| | 1 |
| Nearside Front shock absorber seal failed and leaking oil |2.3.3| | 1 |
| Drive chain so loose it is likely to fail (6.1.7 (c) (ii)) | 1 |
| Chain guard insecure |6.2.1c| | 1 |
| Headlamp aim not tested both elements of bulb on at same time |4.1.2 |b|| | 1 |
| Headlamp light intensity severely reduced both elements on at same time |4.1.4 |a|| | 1 |
| Registration plate lamp issues | 1 |
| Drive chain excessively tight |6.2.1d| | 1 |
| Rear Rear wheel bearings have excessive free play |2.4.A.2c| | 1 |
| Front Front position lamp incorrect colour |1.1.2a| | 1 |
| Locking device|s| not correctly fitted which may make the motor bicycle dangerous to ride |6.2.1h| | 1 |
| 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| | 1 |
| Offside Rear All direction indicators incorrect colour (4.4.3 (a)) | 1 |
| Brake master cylinder insecurely mounted |3.2.B1a| | 1 |
| Front Headlamp at least one does not illuminate on dipped beam |1.2.2a|i|| | 1 |
| Front Headlamp at least one does not illuminate on main beam |1.2.2a|ii|| | 1 |
| Front Brake fluid reservoir fluid level dangerously low |3.2.B1d| | 1 |
| Front Direction indicator affected by the operation of another lamp |1.5.1c| | 1 |
| Front Front mudguard can easily contact any fixed point of the motor bicycle. |2.3.7| | 1 |
| Exhaust mounting missing |7.1.1c| | 1 |
| Direction indicator not working |1.5.1c| | 1 |
| Riders seat insecure |6.2.1a| | 1 |
| Direction indicator affected by the operation of another lamp |1.5.1c| | 1 |
| Front Brake disc|s| excessively worn |3.2.A1l| | 1 |
| Front Brake caliper|s| securing bolt|s| loose |3.2.A1j| | 1 |
| Rear Brake disc|s| excessively worn |3.2.A1l| | 1 |
| Headlamp aim beam image kick up to the offside |1.6| | 1 |
| Nearside Handlebar handgrip not secure to handlebars. |2.1.1c| | 1 |
| Steering headbearing has excessive free play |2.2.2| | 1 |
| Wheel alignment incorrect which adversely affects the steering (2.4 (a)) | 1 |
| Rear Rear reflector on motorcycle missing |1.4.1| | 1 |
| Front Direction indicator flashing more than 120 times per minute |1.5.1c| | 1 |
| Rear Direction indicator flashing more than 120 times per minute |1.5.1c| | 1 |
| Front Steering headbearing has excessive free play |2.2.2| | 1 |
| Steering movement excessively `notchy` with the wheel raised |2.2.1b| | 1 |
| Offside Handlebar handgrip not secure to handlebars. |2.1.1c| | 1 |