| Most common failures | No# failures |
|---|
| Headlamp aim out of alignment | 74 |
| Drive chain excessively loose |6.2.1d| | 46 |
| Front Roller brake test indicates a binding brake |3.3.A1a| | 37 |
| Rear reflector on motorcycle missing |1.4.1| | 33 |
| Rear Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 21 |
| Registration plate issues | 19 |
| Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 19 |
| Rear reflector on motorcycle obscured |1.4.1| | 18 |
| Rear Roller brake test indicates a binding brake |3.3.A1a| | 14 |
| Front Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 14 |
| Drive chain worn to excess |6.2.1e| | 13 |
| Roller brake test The less effective brake control does not achieve an efficiency of 25%. |3.3.A2b| | 12 |
| Rear Roller brake test indicates a sticking brake |3.3.A1a| | 11 |
| Exhaust is leaking and excessively noisey |7.1.1b| | 9 |
| Headlamp aim beam image kick up to the offside |1.6| | 9 |
| Nearside Front shock absorber seal failed and leaking oil |2.3.3| | 9 |
| Front Floor brake test indicates a binding brake |3.3.C2c| | 9 |
| Rear position lamp does not illuminate immediately when it is switched on |1.1.3a| | 8 |
| Front position lamp does not illuminate immediately when switched on |1.1.3a| | 8 |
| Throttle operating incorrectly |6.2.1f| | 7 |
| Riders seat insecure |6.2.1a| | 7 |
| Steering movement excessively `notchy` with the wheel raised |2.2.1b| | 7 |
| Handlebar deformed |2.1.1b| | 7 |
| Front Brake disc|s| excessively worn |3.2.A1l| | 7 |
| Wheel alignment incorrect which adversely affects the handling |2.5.1| | 6 |
| Rear Drive chain sprocket worn to excess |6.2.1e| | 6 |
| Front Brake excessively binding (1.2.1 (f)) | 6 |
| Locking device|s| not correctly fitted which may make the motor bicycle dangerous to ride |6.2.1h| | 5 |
| Throttle has a significant change in engine speed whilst moving the steering from lock to lock |2.1.4| | 5 |
| Rear Drive chain excessively loose |6.2.1d| | 5 |
| Nearside Handlebar handgrip not secure to handlebars. |2.1.1c| | 5 |
| Front Floor brake test indicates a sticking brake |3.3.C2c| | 5 |
| Rear Brake excessively binding (1.2.1 (f)) | 5 |
| Drive chain excessively tight |6.2.1d| | 4 |
| Brake locking device missing |3.2.A1e| | 4 |
| Front Roller brake test indicates a sticking brake |3.3.A1a| | 4 |
| Rear Roller brake test indicates brake effort rise disproportional to brake lever or pedal effort |3.3.A1c| | 4 |
| Rear reflector missing (4.8.2 (a) (ii)) | 4 |
| Roller brake test The less effective brake control does not achieve an efficiency of 25% (1.2.2 (a) (i)) | 4 |
| Rear Stop lamp not working (4.3.1 (a) (ii)) | 4 |
| Front Brake disc|s| cracked |3.2.A1g| | 3 |
| Locking devices not correctly fitted which may make the motor bicycle dangerous to ride |6.2.1h| | 3 |
| Seat insecure |6.2.1a| | 3 |
| Front wheel bearings have excessive free play |2.3.5b| | 3 |
| Steering headbearing has excessive free play |2.2.2| | 3 |
| Rear reflector missing |4.8.2 |a| |ii|| | 3 |
| Offside Front shock absorber seal failed and leaking oil |2.3.3| | 3 |
| Front shock absorber seal failed and leaking oil |2.3.3| | 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| | 3 |
| Headlamp aim beam image kick-up is to the offside |1.6.1| | 3 |
| Drive chain sprocket worn to excess |6.2.1e| | 3 |
| Rear Brake locking device missing |3.2.A1e| | 3 |
| All direction indicators not working (4.4.1 (a) (ii)) | 3 |
| Drive chain excessively tight, so that it is likely to fail (6.1.7 (k) (ii)) | 3 |
| Rear Position lamp not working (4.2.1 (a)) | 3 |
| Front Front shock absorber seal failed and leaking oil |2.3.3| | 2 |
| Rear Floor brake test indicates a binding brake |3.3.C2c| | 2 |
| Brake pedal is bent and the brake cannot be readily applied |3.1.3c| | 2 |
| Drive chain worn to excess |6.1.7 |c| |i|| | 2 |
| Rear Rear reflector on motorcycle missing |1.4.1| | 2 |
| Front Roller brake test indicates brake effort rise disproportional to brake lever or pedal effort |3.3.A1c| | 2 |
| Rear Seat insecure |6.2.1a| | 2 |
| Rear Roller brake test indicates brake effort fall disproportional to brake lever or pedal effort |3.3.A1c| | 2 |
| Front Exhaust is leaking and excessively noisey |7.1.1b| | 2 |
| Headlamp at least one does not illuminate on dipped beam |1.2.2a|i|| | 2 |
| Exhaust noise is clearly in excess of that emitted by a similar motorcycle fitted with a standard silencer in average condition |8.1.1 |a|| | 2 |
| Riders seat insecure |6.2.5 |a| |ii|| | 2 |
| Indicator switch defective |1.5.4| | 2 |
| Front Front position lamp does not illuminate immediately when switched on |1.1.3a| | 2 |
| Front Brake lever cannot be applied smoothly |3.1.3d| | 2 |
| Rear reflector on motorcycle obscured |1.4.2b| | 2 |
| Rear wheel spindle securing nut locking device missing |2.4.A.2b| | 2 |
| Rear Roller brake test indicates excessive fluctuation of brake effort |3.3.A1d| | 2 |
| Horn not working |1.7.3a| | 2 |
| Headlamp at least one does not illuminate on main beam |1.2.2a|ii|| | 2 |
| Exhaust excessively deteriorated |7.1.1a| | 2 |
| Rear Rear reflector on motorcycle obscured |1.4.1| | 2 |
| Front Stop lamp remains on when the brake is released |1.3.1e| | 2 |
| Offside Rear Roller brake test indicates a sticking brake |3.3.A1a| | 2 |
| Rear Wheel alignment incorrect which adversely affects the handling |2.5.1| | 2 |
| Front Exhaust has a major leak of exhaust gases (6.1.2 (a)) | 2 |
| Rear Wheel alignment incorrect which adversely affects the handling (2.4 (a)) | 2 |
| Front Wheel bearing rough when rotated (5.1.3 (b) (i)) | 2 |
| Stop lamp remains on when the brakes are released | 2 |
| Registration plate lamp issues | 2 |
| Rear Brake pedal not releasing correctly and functionality of brakes affected (1.1.2 (b) (ii)) | 2 |
| Stop lamp not working (4.3.1 (a) (ii)) | 2 |
| Front Stop lamp not working (4.3.1 (a) (ii)) | 2 |
| Drive chain so loose it is likely to fail (6.1.7 (c) (ii)) | 2 |