| Most common failures | No# failures |
|---|
| Headlamp aim out of alignment | 239 |
| Rear reflector on motorcycle missing |1.4.1| | 123 |
| Registration plate issues | 114 |
| Front Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 38 |
| Front Roller brake test indicates a binding brake |3.3.A1a| | 22 |
| Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 18 |
| Rear Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 18 |
| Drive chain excessively loose |6.2.1d| | 18 |
| Headlamp aim beam image kick up to the offside |1.6| | 17 |
| Horn not working |1.7.3a| | 17 |
| Nearside Handlebar handgrip not secure to handlebars. |2.1.1c| | 17 |
| Rear Rear reflector on motorcycle missing |1.4.1| | 16 |
| Exhaust is leaking and excessively noisey |7.1.1b| | 15 |
| Rear reflector missing (4.8.2 (a) (ii)) | 13 |
| Nearside Rear Direction indicator not working |1.5.1c| | 11 |
| 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| | 10 |
| Front position lamp does not illuminate immediately when switched on |1.1.3a| | 9 |
| Nearside Front shock absorber seal failed and leaking oil |2.3.3| | 9 |
| Headlamp at least one does not illuminate on dipped beam |1.2.2a|i|| | 7 |
| Rear Roller brake test indicates excessive fluctuation of brake effort |3.3.A1d| | 7 |
| Rear position lamp does not illuminate immediately when it is switched on |1.1.3a| | 7 |
| Nearside Front Footrest insecure |6.2.1a| | 7 |
| Nearside Rear Direction indicators not working |1.5.1c| | 7 |
| Rear reflector missing |4.8.2 |a| |ii|| | 6 |
| Throttle operating incorrectly |6.2.1f| | 5 |
| Exhaust markings indicating not for road use or similar wording |7.1.4| | 5 |
| Offside Front Footrest insecure |6.2.1a| | 5 |
| Drive chain excessively tight |6.2.1d| | 5 |
| Steering headbearing has excessive free play |2.2.2| | 4 |
| Exhaust excessively deteriorated |7.1.1a| | 4 |
| Steering movement excessively `notchy` with the wheel raised |2.2.1b| | 4 |
| Offside Handlebar handgrip not secure to handlebars. |2.1.1c| | 4 |
| Nearside Front Direction indicators not working |1.5.1c| | 4 |
| Direction indicator flashing more than 120 times per minute |1.5.1c| | 4 |
| Front Front shock absorber seal failed and leaking oil |2.3.3| | 4 |
| Centre Rear Rear reflector on motorcycle missing |1.4.1| | 4 |
| Rear Stop lamp not working |4.3.1 |a| |ii|| | 4 |
| Wheel alignment incorrect which adversely affects the steering |2.5.1| | 4 |
| Brake lever has inadequate reserve travel |3.1.3b| | 4 |
| Front Headlamp at least one does not illuminate on dipped beam |1.2.2a|i|| | 4 |
| Nearside Front Direction indicator not working |1.5.1c| | 4 |
| Rear reflector on motorcycle missing (1.4.1) | 4 |
| Front Headlamp aim beam image kick up to the offside |1.6| | 3 |
| Stop lamp affected by the operation of another lamp |1.3.2| | 3 |
| Front wheel bearings have excessive free play |2.3.5b| | 3 |
| Drive chain worn to excess |6.2.1e| | 3 |
| Front Roller brake test indicates a sticking brake |3.3.A1a| | 3 |
| Front Roller brake test indicates excessive fluctuation of brake effort |3.3.A1d| | 3 |
| Steering movement excessively `notchy` with the weight on the lower bearing |2.2.1a| | 3 |
| Stop lamp remains on when the brake is released |1.3.1e| | 3 |
| Horn not working |7.7 |a| |ii|| | 3 |
| Offside Rear Direction indicator not working |1.5.1c| | 3 |
| Front position lamp missing |1.1.1a| | 3 |
| Nearside Footrest insecure |6.2.1a| | 3 |
| Rear position lamp adversely affected by the operation of another lamp |1.1.3b| | 3 |
| Rear Roller brake test indicates a binding brake |3.3.A1a| | 3 |
| Locking devices not correctly fitted which may make the motor bicycle dangerous to ride |6.2.1h| | 3 |
| Rear reflector on motorcycle incorrectly positioned |1.4.2d| | 3 |
| Horn not loud enough to be heard by another road user |1.7.3a| | 3 |
| Offside Front Direction indicator not working |1.5.1c| | 3 |
| Rear Drive chain excessively loose |6.2.1d| | 3 |
| Headlamp not working on dipped beam (4.1.1 (a) (ii)) | 3 |
| Offside Rear Direction indicator not working (4.4.1 (a) (ii)) | 3 |
| Front Stop lamp not working (4.3.1 (a) (ii)) | 3 |
| Offside Front Shock absorber has a serious fluid leak (5.3.2 (b)) | 3 |