| Most common failures | No# failures |
|---|
| Headlamp aim out of alignment | 60 |
| Registration plate issues | 52 |
| Rear reflector on motorcycle missing |1.4.1| | 27 |
| Registration plate lamp issues | 23 |
| Rear Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 17 |
| Drive chain excessively loose |6.2.1d| | 15 |
| Headlamp at least one does not illuminate on dipped beam |1.2.2a|i|| | 10 |
| Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 9 |
| Parking brake: efficiency below requirements |3.7.C.1b| | 9 |
| Front Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 8 |
| Horn not working |1.7.3a| | 7 |
| Windscreen wiper does not clear the windscreen effectively | 7 |
| Front position lamp does not illuminate immediately when switched on |1.1.3a| | 7 |
| Parking brake: efficiency below requirements |3.7.B.7| | 6 |
| Front Roller brake test indicates a binding brake |3.3.A1a| | 6 |
| Headlamp aim beam image kick up to the offside |1.6| | 5 |
| Rear Roller brake test indicates a sticking brake |3.3.A1a| | 5 |
| Rear Brake pedal has inadequate reserve travel |3.1.3b| | 5 |
| Rear Rear reflector on motorcycle missing |1.4.1| | 5 |
| Front Floor brake test indicates a binding brake |3.3.C2c| | 5 |
| Rear position lamp does not illuminate immediately when it is switched on |1.1.3a| | 4 |
| Front wheel bearings have excessive free play |2.3.5b| | 4 |
| Direction indicators flashing more than 120 times per minute |1.5.1c| | 4 |
| Direction indicators not working |1.4.A.2c| | 4 |
| Hazard warning lamps not flashing in phase, with ignition on |1.4.B.1f| | 4 |
| Headlamp not working on dipped beam |1.7.5a| | 4 |
| Rear Roller brake test indicates a binding brake |3.3.A1a| | 4 |
| Roller brake test The less effective brake control does not achieve an efficiency of 25%. |3.3.A2b| | 4 |
| Stop lamp remains on when the brakes are released | 4 |
| Drive chain worn to excess |6.2.1e| | 4 |
| Parking brake lever has no reserve travel |3.1.6b| | 4 |
| Rear reflector missing (4.8.2 (a) (ii)) | 4 |
| Headlamp not working on dipped beam (4.1.1 (a) (ii)) | 4 |
| Horn not working (7.7 (a) (ii)) | 4 |
| 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 at least one does not illuminate on main beam |1.2.2a|ii|| | 3 |
| Rear Position lamp not working |4.2.1 |a|| | 3 |
| Front position lamp|s| not working |1.1.A.3b| | 3 |
| Hazard warning lamps not flashing in phase, with ignition off |1.4.B.1f| | 3 |
| Headlamp insecure |1.2.3b| | 3 |
| Horn not working |1.6.2a| | 3 |
| Steering movement excessively `notchy` with the wheel raised |2.2.1b| | 3 |
| Offside Front shock absorber seal failed and leaking oil |2.3.3| | 3 |
| Rear Stop lamp not working |4.3.1 |a| |ii|| | 3 |
| Front Front wheel bearings have excessive free play |2.3.5b| | 3 |
| Locking device|s| not correctly fitted which may make the motor bicycle dangerous to ride |6.2.1h| | 3 |
| Nearside Obligatory mirror missing |8.1.1| | 3 |
| Offside Obligatory mirror missing |8.1.1| | 3 |
| Rear Stop lamp remains on when the brake is released |1.3.1e| | 3 |
| Riders seat insecure |6.2.1a| | 3 |
| Drive chain excessively tight |6.2.1d| | 3 |
| Rear wheel bearings have excessive free play |2.4.A.2c| | 3 |
| Rear position lamp adversely affected by the operation of another lamp |1.1.3b| | 3 |
| Nearside Rear Direction indicators not working |1.5.1c| | 3 |
| Drive chain excessively loose |6.1.7 |c| |i|| | 3 |
| Front Brake lever has inadequate reserve travel |3.1.3b| | 3 |
| Brake pipe excessively corroded | 3 |
| Rear Stop lamp not working (4.3.1 (a) (ii)) | 3 |
| Drive chain excessively loose (6.1.7 (c) (i)) | 3 |
| Headlamp not working on main beam (4.1.1 (a) (ii)) | 3 |
| Front Horn not working |1.7.3a| | 2 |
| Front Steering movement excessively `notchy` with the wheel raised |2.2.1b| | 2 |
| Wheel alignment incorrect which adversely affects the handling |2.5.1| | 2 |
| Rear position lamp|s| not working |1.1.A.3b| | 2 |
| Hazard warning lamps inoperative |1.4.B.1b| | 2 |
| Headlamp not working on main beam |1.7.5a| | 2 |
| Rear Brake lining|s| less than 1.5 mm thick |3.2.A1f|i|| | 2 |
| Rear Floor brake test indicates a sticking brake |3.3.C2c| | 2 |
| Front Headlamp at least one does not illuminate on dipped beam |1.2.2a|i|| | 2 |
| Brake pedal has inadequate reserve travel |3.1.3b| | 2 |
| Front position lamp|s| missing |1.1.A.3a| | 2 |
| Nearside Rear Rear reflector missing |1.5.1a| | 2 |
| Stop lamp remains on when the brake is released |1.3.1e| | 2 |
| Nearside Rear Stop lamp not working |1.2.1b| | 2 |
| Rear Wheel alignment incorrect which adversely affects the handling |2.5.1| | 2 |
| Rear Chain guard insecure |6.2.1c| | 2 |
| Offside Rear Footrest insecure |6.2.1a| | 2 |
| Offside Rear Rear wheel bearing has excessive play |2.6.2| | 2 |
| Centre Front position lamp|s| not working |1.1.A.3b| | 2 |
| Offside Front Direction indicators not working |1.5.1c| | 2 |
| Offside Steering control has Insufficient clearance at full lock affecting the riders grasp of handlebars |2.1.2b| | 2 |
| Wheel alignment incorrect which adversely affects the steering |2.5.1| | 2 |
| Offside Front Direction indicator insecure |1.5.3b| | 2 |
| Stop lamp not working |4.3.1 |a| |ii|| | 2 |
| Offside Front Direction indicator incorrect colour |1.5.1b| | 2 |
| Nearside Handlebar handgrip not secure to handlebars. |2.1.1c| | 2 |
| Steering headbearing has excessive free play |2.2.2| | 2 |
| Rear Roller brake test indicates brake effort rise disproportional to brake lever or pedal effort |3.3.A1c| | 2 |
| Rear Drive chain sprocket worn to excess |6.2.1e| | 2 |
| Horn control missing |1.6.1| | 2 |
| Rear Brake excessively binding |1.2.1 |f|| | 2 |
| Offside Front Front shock absorber seal failed and leaking oil |2.3.3| | 2 |
| Front Front position lamp|s| not working |1.1.A.3b| | 2 |
| Front Roller brake test indicates excessive fluctuation of brake effort |3.3.A1d| | 2 |
| Front Headlamp at least one does not illuminate on main beam |1.2.2a|ii|| | 2 |
| Parking brake is not capable of being maintained in operation by direct mechanical action only |3.1.2| | 2 |
| Rear reflector missing |1.5.1a| | 2 |
| Front brake disc in such a condition that it is seriously weakened | 2 |
| Nearside Stop lamp(s) not working (4.3.1 (a) (ii)) | 2 |
| Nearside Front Suspension arm ball joint excessively worn (5.3.4 (a) (i)) | 2 |
| Offside Front Suspension arm ball joint excessively worn (5.3.4 (a) (i)) | 2 |
| Offside Rear Direction indicator not working (4.4.1 (a) (ii)) | 2 |
| Rear Rear reflector missing (4.8.2 (a) (ii)) | 2 |
| Brake performance not tested (1.2.1 (g)) | 2 |
| Nearside Handlebar grip insecure to handlebar (2.2.1 (d) (ii)) | 2 |
| Front Position lamp not working (4.2.1 (a)) | 2 |
| Parking brake efficiency less than 50% of the required value (1.4.2 (a) (ii)) | 2 |
| Engine MIL inoperative or indicates a malfunction (8.2.1.2 (h)) | 2 |
| Rear Wheel bearing has excessive play (5.1.3 (a) (i)) | 2 |
| Nearside Front Brake disc significantly and obviously worn (1.1.14 (a) (i)) | 2 |
| Offside Front Brake disc significantly and obviously worn (1.1.14 (a) (i)) | 2 |