| Most common failures | No# failures |
|---|
| Headlamp aim out of alignment | 54 |
| Registration plate issues | 41 |
| Rear reflector on motorcycle missing |1.4.1| | 27 |
| Headlamp aim beam image kick up to the offside |1.6| | 23 |
| Front Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 13 |
| 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| | 12 |
| Rear Roller brake test indicates a binding brake |3.3.A1a| | 12 |
| Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 8 |
| Front Stop lamp not working (4.3.1 (a) (ii)) | 7 |
| Front Roller brake test indicates a binding brake |3.3.A1a| | 7 |
| Rear Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 7 |
| Registration plate lamp issues | 6 |
| Throttle operating incorrectly |6.2.1f| | 6 |
| Rear Stop lamp remains on when the brake is released |1.3.1e| | 6 |
| Rear reflector missing (4.8.2 (a) (ii)) | 6 |
| Front position lamp does not illuminate immediately when switched on |1.1.3a| | 6 |
| Horn not working |1.7.3a| | 6 |
| Drive chain excessively loose |6.2.1d| | 6 |
| Drive chain worn to excess |6.2.1e| | 5 |
| Rear Rear reflector on motorcycle missing |1.4.1| | 5 |
| Rear position lamp does not illuminate immediately when it is switched on |1.1.3a| | 4 |
| 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|| | 4 |
| Front Stop lamp not working |4.3.1 |a| |ii|| | 3 |
| Rear Brake pedal cannot be released smoothly |3.1.3d| | 3 |
| Rear Stop lamp not working (4.3.1 (a) (ii)) | 3 |
| Front Headlamp aim beam image kick up to the offside |1.6| | 3 |
| Steering control fouling between components which interferes with the free movement of the steering |2.1.2a| | 3 |
| Front Roller brake test indicates excessive fluctuation of brake effort |3.3.A1d| | 3 |
| Rear Floor brake test indicates a binding brake |3.3.C2c| | 3 |
| Roller brake test indicates a binding brake |3.3.A1a| | 3 |
| Rear reflector missing |4.8.2 |a| |ii|| | 3 |
| Rear Floor brake test indicates a sticking brake |3.3.C2c| | 3 |
| Rear Brake excessively binding (1.2.1 (f)) | 3 |
| Nearside Front Direction indicator not working |1.5.1c| | 3 |
| Headlamp at least one does not illuminate on dipped beam |1.2.2a|i|| | 3 |
| Stop lamp not working (4.3.1 (a) (ii)) | 3 |
| Headlamp not working on main beam (4.1.1 (a) (ii)) | 3 |
| Rear wheel bearings have excessive free play |2.4.A.2c| | 3 |
| Headlamp aim projected beam image obviously incorrect (4.1.2 (c)) | 2 |
| Rear wheel spindle securing nut locking device missing |2.4.A.2b| | 2 |
| Rear reflector on motorcycle missing (1.4.1) | 2 |
| Rear Drive chain sprocket worn to excess |6.2.1e| | 2 |
| Rear Drive chain excessively loose |6.2.1d| | 2 |
| Rear shock absorber has inadequate damping effect. |2.4.A.3b| | 2 |
| Offside Front Direction indicator not working |1.5.1c| | 2 |
| Rear Brake disc|s| cracked |3.2.A1g| | 2 |
| Front Brake excessively binding (1.2.1 (f)) | 2 |
| Front wheel bearings have excessive free play |2.3.5b| | 2 |
| Horn missing |1.7.1| | 2 |
| Locking devices not correctly fitted which may make the motor bicycle dangerous to ride |6.2.1h| | 2 |
| Front Brake excessively binding |1.2.1 |f|| | 2 |
| Roller brake test The less effective brake control does not achieve an efficiency of 25% |1.2.2 |a| |i|| | 2 |
| Front Roller brake test indicates a sticking brake |3.3.A1a| | 2 |
| Front Front position lamp does not illuminate immediately when switched on |1.1.3a| | 2 |
| Rear Roller brake test indicates excessive fluctuation of brake effort |3.3.A1d| | 2 |
| Front Headlamp aim beam image kick-up is to the offside |1.6.1| | 2 |
| Offside Front Direction indicators not working |1.5.1c| | 2 |
| Horn not working (7.7 (a)) | 2 |
| Horn not working (7.7 (a) (ii)) | 2 |
| Roller brake test indicates excessive fluctuation of brake effort |3.3.A1d| | 2 |
| Roller brake test The less effective brake control does not achieve an efficiency of 25%. |3.3.A2b| | 2 |
| Front Brake lever cannot be applied smoothly |3.1.3d| | 2 |
| Rear Rear reflector missing |4.8.2 |a| |ii|| | 2 |
| Stop lamp does not illuminate by the operation of both brake controls (4.3.2 (a) (iii)) | 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 |
| Rear Brake excessively binding |1.2.1 |f|| | 2 |
| Rear Rear reflector missing (4.8.2 (a) (ii)) | 2 |
| Rear Roller brake test indicates brake effort fall disproportional to brake lever or pedal effort |3.3.A1c| | 2 |
| Wheel alignment incorrect which adversely affects the steering |2.5.1| | 2 |
| Front Throttle operating incorrectly |6.2.1f| | 2 |