| Most common failures | No# failures |
|---|
| Registration plate issues | 223 |
| Rear reflector on motorcycle missing |1.4.1| | 180 |
| Headlamp aim out of alignment | 126 |
| Rear Roller brake test indicates a binding brake |3.3.A1a| | 51 |
| Rear position lamp does not illuminate immediately when it is switched on |1.1.3a| | 39 |
| Front wheel bearings have excessive free play |2.3.5b| | 38 |
| Horn not working |1.7.3a| | 35 |
| Rear Rear reflector on motorcycle missing |1.4.1| | 33 |
| Front Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 33 |
| Rear wheel bearings have excessive free play |2.4.A.2c| | 31 |
| Rear Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 31 |
| Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 28 |
| Drive chain excessively loose |6.2.1d| | 25 |
| Rear reflector missing (4.8.2 (a) (ii)) | 24 |
| Front Roller brake test indicates a binding brake |3.3.A1a| | 21 |
| Headlamp at least one does not illuminate on main beam |1.2.2a|ii|| | 20 |
| 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| | 19 |
| Headlamp at least one does not illuminate on dipped beam |1.2.2a|i|| | 18 |
| Rear Wheel spoke excessively loose |4.2.1b| | 18 |
| Nearside Handlebar handgrip not secure to handlebars. |2.1.1c| | 15 |
| Roller brake test The less effective brake control does not achieve an efficiency of 25%. |3.3.A2b| | 13 |
| Drive chain worn to excess |6.2.1e| | 13 |
| Front Wheel spoke excessively loose |4.2.1b| | 12 |
| Registration plate lamp issues | 12 |
| Exhaust is leaking and excessively noisey |7.1.1b| | 11 |
| Headlamp aim beam image kick up to the offside |1.6| | 11 |
| Rear Drive chain sprocket worn to excess |6.2.1e| | 11 |
| Steering movement excessively `notchy` with the weight on the lower bearing |2.2.1a| | 11 |
| Rear Position lamp not working (4.2.1 (a)) | 10 |
| Rear reflector missing |4.8.2 |a| |ii|| | 10 |
| Direction indicators flashing more than 120 times per minute |1.5.1c| | 10 |
| Front Front wheel bearings have excessive free play |2.3.5b| | 10 |
| Rear Rear wheel bearings have excessive free play |2.4.A.2c| | 10 |
| Steering headbearing has excessive free play |2.2.2| | 10 |
| Locking device|s| not correctly fitted which may make the motor bicycle dangerous to ride |6.2.1h| | 9 |
| Front Wheel bearing has excessive play (5.1.3 (a) (i)) | 9 |
| Wheel alignment incorrect which adversely affects the handling |2.5.1| | 9 |
| Nearside Rear Footrest missing |6.2.1a| | 9 |
| Steering movement excessively `notchy` with the wheel raised |2.2.1b| | 9 |
| Front wheel bearings are excessively rough |2.3.5b| | 8 |
| Stop lamp remains on when the brake is released |1.3.1e| | 8 |
| Centre Rear Rear reflector on motorcycle missing |1.4.1| | 8 |
| Front Floor brake test indicates a binding brake |3.3.C2c| | 8 |
| Front position lamp does not illuminate immediately when switched on |1.1.3a| | 8 |
| Rear Wheel bearing has excessive play (5.1.3 (a) (i)) | 8 |
| Rear reflector on motorcycle missing (1.4.1) | 7 |
| Front Stop lamp remains on when the brake is released |1.3.1e| | 7 |
| Rear suspension bush has excessive free play |2.4.A2a|i|| | 7 |
| Throttle operating incorrectly |6.2.1f| | 7 |
| Drive chain excessively tight |6.2.1d| | 7 |
| Rear Stop lamp remains on when the brake is released |1.3.1e| | 7 |
| Offside Rear Direction indicator not working |1.5.1c| | 6 |
| Rear suspension bearing has excessive free play |2.4.A2a|i|| | 6 |
| Horn missing |1.7.1| | 6 |
| Rear Floor brake test indicates a binding brake |3.3.C2c| | 6 |
| Front Brake disc|s| excessively worn |3.2.A1l| | 6 |
| Indicator switch insecure |1.5.4| | 5 |
| Front Direction indicator missing |1.5.1a| | 5 |
| Rear Roller brake test indicates a sticking brake |3.3.A1a| | 5 |
| Exhaust markings indicating not for road use or similar wording |7.1.4| | 5 |
| Rear Drive chain worn to excess |6.2.1e| | 5 |
| Offside Rear Footrest missing |6.2.1a| | 5 |
| Nearside Rear Direction indicator missing |1.5.1a| | 5 |
| Nearside Rear Direction indicators not working |1.5.1c| | 5 |
| Horn not working (7.7 (a) (ii)) | 5 |
| Front Brake disc|s| cracked |3.2.A1g| | 4 |
| Nearside Rear Direction indicator not working |4.4.1 |a| |ii|| | 4 |
| Stop lamp does not illuminate immediately a brake applies (1.3.1a) | 4 |
| Offside Rear Direction indicators not working |1.5.1c| | 4 |
| Direction indicator flashing more than 120 times per minute |1.5.1c| | 4 |
| Front Roller brake test indicates a sticking brake |3.3.A1a| | 4 |
| Rear Direction indicator missing |1.5.1a| | 4 |
| Stop lamp missing |1.3.3a| | 4 |
| Headlamp aim not tested |1.6| | 4 |
| Rear Stop lamp missing |1.3.3a| | 4 |
| Drive chain horseshoe locking device incorrectly fitted (6.1.7 (j) (i)) | 4 |
| Front Brake excessively binding |1.2.1 |f|| | 4 |
| Nearside Rear Direction indicator not working |1.5.1c| | 4 |
| Brake lever has inadequate reserve travel |3.1.3b| | 4 |
| Horn not working (1.7.3a) | 4 |
| Offside Handlebar handgrip not secure to handlebars. |2.1.1c| | 4 |
| Nearside Front Direction indicator missing |1.5.1a| | 4 |
| Offside Front Direction indicator missing |1.5.1a| | 4 |
| Offside Rear Direction indicator missing |1.5.1a| | 4 |
| Front Brake excessively binding (1.2.1 (f)) | 4 |
| Front Stop lamp missing |1.3.3a| | 4 |