| Most common failures | No# failures |
|---|
| Headlamp aim out of alignment | 5 |
| Registration plate lamp issues | 5 |
| Exhaust has a major leak of exhaust gases |7.1.2| | 2 |
| Rear parking brake recording little or no effort | 2 |
| Rear reflector on motorcycle missing |1.4.1| | 2 |
| Nearside Front shock absorber seal failed and leaking oil |2.3.3| | 2 |
| Nearside Rear reflector missing |1.5.1a| | 2 |
| Offside Rear reflector missing |1.5.1a| | 2 |
| Service brake: efficiency below requirements |3.7.B.7| | 2 |
| Parking brake: efficiency below requirements |3.7.C.1b| | 1 |
| Nearside Rear brake drum contaminated by oil |3.5.1h| | 1 |
| Parking brake efficiency below requirements |3.7.C.1b| | 1 |
| Nearside Rear Trikes, quads or pre-68 vehicles, service brake efficiency below requirements |3.7.C.1a| | 1 |
| Hazard warning lamps inoperative |1.4.B.1b| | 1 |
| Registration plate issues | 1 |
| Nearside Obligatory mirror missing |8.1.1| | 1 |
| Offside Obligatory mirror missing |8.1.1| | 1 |
| Offside Stop lamp not working |1.2.1b| | 1 |
| Nearside Rear Brake pipe inadequately clipped |3.6.B.1| | 1 |
| Nearside Rear Brake pipe inadequately supported |3.6.B.1| | 1 |
| Fuel pipe leaking |7.2.3| | 1 |
| Mechanical brake component securing device loose |3.5.1i| | 1 |
| Axle swivel joint insecure in a suspension arm |2.5.A.3b| | 1 |
| Steering movement excessively rough with the wheel raised |2.2.1b| | 1 |
| Roller brake test The less effective brake control does not achieve an efficiency of 25%. |3.3.A2b| | 1 |
| Front wheel bearings are excessively rough |2.3.5b| | 1 |
| Front wheel bearings have excessive free play |2.3.5b| | 1 |
| Locking devices not correctly fitted which may make the motor bicycle dangerous to ride |6.2.1h| | 1 |
| Fuel system component leaking |7.2.1a| | 1 |
| Steering headbearing has excessive free play |2.2.2| | 1 |
| Front position lamp does not illuminate immediately when switched on |1.1.3a| | 1 |
| Front Brake lever has inadequate reserve travel |3.1.3b| | 1 |
| Steering system excessively rough |2.2.D.1| | 1 |
| Offside Rear Parking brake inoperative on one side (1.4.1 (a)) | 1 |
| Parking brake efficiency less than 50% of the required value (1.4.2 (a) (ii)) | 1 |
| Centre Headlamp insecure |1.7.3| | 1 |
| Centre Headlamp aim aimed so that it dazzles other road users |1.8.A.1a| | 1 |
| Rear brake binding | 1 |
| Stop lamp not working |1.2.1b| | 1 |
| rear brake recording little or no effort |3.7.B.5a| | 1 |
| Rear Passenger`s seat insecure |6.2.A.1| | 1 |
| Parking brake: efficiency below requirements |3.7.B.7| | 1 |
| Nearside Rear Stop lamp not working |1.2.1b| | 1 |
| Offside Rear Stop lamp not working |1.2.1b| | 1 |
| Rear Brake pipe inadequately supported |3.6.B.1| | 1 |
| Nearside Front position lamp|s| not working |1.1.A.3b| | 1 |
| Parking brake lever has no reserve travel |3.1.6b| | 1 |
| Rear Brake pedal has insufficient reserve movement |3.3.A.5| | 1 |
| Offside Headlamp aim projected beam image is obviously incorrect (4.1.2 (c)) | 1 |
| Front Position lamp not working (4.2.1 (a) (ii)) | 1 |
| Nearside Front Direction indicator not working (4.4.1 (a) (ii)) | 1 |
| Rear reflector missing |1.5.1a| | 1 |
| Front brake disc contaminated by grease |3.5.1h| | 1 |
| Front Steering locking device missing |2.2.C.1g| | 1 |
| Offside Front Direction indicator not working |1.4.A.2c| | 1 |
| Stop lamp missing |1.2.1a| | 1 |