| Most common failures | No# failures |
|---|
| Registration plate issues | 135 |
| Rear reflector on motorcycle missing |1.4.1| | 117 |
| Headlamp aim out of alignment | 85 |
| Horn not working |1.7.3a| | 47 |
| Front wheel bearings have excessive free play |2.3.5b| | 34 |
| Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 33 |
| Rear position lamp does not illuminate immediately when it is switched on |1.1.3a| | 32 |
| Rear wheel bearings have excessive free play |2.4.A.2c| | 26 |
| Rear Rear reflector on motorcycle missing |1.4.1| | 23 |
| Front Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 22 |
| Rear Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 19 |
| Headlamp aim beam image kick up to the offside |1.6| | 18 |
| Nearside Front shock absorber seal failed and leaking oil |2.3.3| | 14 |
| Front wheel bearings are excessively rough |2.3.5b| | 12 |
| Headlamp at least one does not illuminate on dipped beam |1.2.2a|i|| | 11 |
| Rear reflector missing (4.8.2 (a) (ii)) | 11 |
| Steering headbearing has excessive free play |2.2.2| | 10 |
| Rear Wheel spoke excessively loose |4.2.1b| | 10 |
| 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| | 10 |
| Offside Front shock absorber seal failed and leaking oil |2.3.3| | 9 |
| Rear Rear wheel bearings have excessive free play |2.4.A.2c| | 9 |
| Drive chain excessively loose |6.2.1d| | 8 |
| Horn missing |1.7.1| | 8 |
| Drive chain worn to excess |6.2.1e| | 7 |
| Front shock absorber seal failed and leaking oil |2.3.3| | 7 |
| Locking device|s| not correctly fitted which may make the motor bicycle dangerous to ride |6.2.1h| | 7 |
| Horn not loud enough to be heard by another road user |1.7.3a| | 7 |
| Headlamp at least one does not illuminate on main beam |1.2.2a|ii|| | 7 |
| Rear position lamp incorrect colour |1.1.2b| | 7 |
| Front Headlamp at least one does not illuminate on dipped beam |1.2.2a|i|| | 6 |
| Rear Rear position lamp does not illuminate immediately when it is switched on |1.1.3a| | 6 |
| Rear Position lamp not working (4.2.1 (a)) | 6 |
| Rear reflector on motorcycle missing (1.4.1) | 6 |
| Front Horn not working |1.7.3a| | 5 |
| Front Drive chain sprocket worn to excess |6.2.1e| | 5 |
| Rear Drive chain sprocket worn to excess |6.2.1e| | 5 |
| Rear suspension bearing has excessive free play |2.4.A2a|i|| | 5 |
| Headlamp not working on dipped beam (4.1.1 (a) (ii)) | 5 |
| Fuel system component leaking |7.2.1a| | 4 |
| Wheel alignment incorrect which adversely affects the handling |2.5.1| | 4 |
| Wheel alignment incorrect which adversely affects the steering |2.5.1| | 4 |
| Rear Brake disc|s| excessively worn |3.2.A1l| | 4 |
| Front position lamp does not illuminate immediately when switched on |1.1.3a| | 4 |
| Fuel cap sealing washer missing |7.2.2c| | 4 |
| Roller brake test No brake control achieves an efficiency of 30%. |3.3.A2a| | 4 |
| Roller brake test Neither brake control achieves an efficiency of 25% |3.3.A2b| | 4 |
| Stop lamp remains on when the brakes are released | 4 |
| Riders seat insecure |6.2.1a| | 4 |
| Front Headlamp aim beam image kick-up is to the offside |1.6.1| | 4 |
| Headlamp not working on main beam (4.1.1 (a) (ii)) | 4 |
| Headlamp insecure (4.1.1 (c)) | 4 |
| Nearside Front Front shock absorber seal failed and leaking oil |2.3.3| | 3 |
| Offside Front Front shock absorber seal failed and leaking oil |2.3.3| | 3 |
| Front Wheel spoke excessively loose |4.2.1b| | 3 |
| Roller brake test The less effective brake control does not achieve an efficiency of 25%. |3.3.A2b| | 3 |
| Rear mono-shock pivot excessively worn |2.4.B.4| | 3 |
| Throttle has a significant change in engine speed whilst moving the steering from lock to lock |2.1.4| | 3 |
| Rear suspension bush has excessive free play |2.4.A2a|i|| | 3 |
| Lower Rear mono-shock pivot excessively worn |2.4.B.4| | 3 |
| Stop lamp affected by the operation of another lamp |1.3.2| | 3 |
| Headlamp dipped beam affected by the operation of another lamp |1.2.2c| | 3 |
| Front Front wheel bearings have excessive free play |2.3.5b| | 3 |
| Rear wheel bearings are excessively rough |2.4.A.2c| | 3 |
| Horn not working |7.7 |a| |ii|| | 3 |
| Registration plate lamp issues | 3 |
| Stop lamp remains on when the brake is released |1.3.1e| | 3 |
| Stop lamp not working (4.3.1 (a) (ii)) | 3 |
| Front Wheel bearing has excessive play (5.1.3 (a) (i)) | 3 |
| Vehicle identification number not permanently displayed |6.3.5a| | 2 |
| Headlamp insecure |1.2.3b| | 2 |
| Rear Drive chain excessively tight |6.2.1d| | 2 |
| Front Stop lamp remains on when the brake is released |1.3.1e| | 2 |
| Steering control handlebar movement restricted by taut cables |2.1.2c| | 2 |
| Headlamp aim not tested |1.6| | 2 |
| Rear Brake pedal pivots excessively worn |3.1.3a| | 2 |
| Front Steering headbearing has excessive free play |2.2.2| | 2 |
| Front Headlamp deteriorated and function impaired |1.2.3a| | 2 |
| Front Headlamp at least one does not illuminate on main beam |1.2.2a|ii|| | 2 |
| Front Front position lamp does not illuminate immediately when switched on |1.1.3a| | 2 |
| Horn is not a constant note |1.7.3c| | 2 |
| Steering movement excessively stiff with the wheel raised |2.2.1b| | 2 |
| Offside Rear Direction indicator not working |1.5.1c| | 2 |
| Horn control not readily accesible. |1.7.2a| | 2 |
| Front Front wheel bearings are excessively rough |2.3.5b| | 2 |
| Drive chain excessively tight |6.2.1d| | 2 |
| Direction indicators not working |1.5.1c| | 2 |
| Rear Front wheel bearings have excessive free play |2.3.5b| | 2 |
| Centre Rear Rear reflector on motorcycle missing |1.4.1| | 2 |
| Rear position lamp adversely affected by the operation of another lamp |1.1.3b| | 2 |
| Rear Stop lamp not working |4.3.1 |a| |ii|| | 2 |
| Steering movement excessively `notchy` with the weight on the lower bearing |2.2.1a| | 2 |
| Front Front shock absorber seal failed and leaking oil |2.3.3| | 2 |
| Throttle operating incorrectly |6.2.1f| | 2 |
| Stop lamp not working |4.3.1 |a| |ii|| | 2 |
| Lower Rear suspension bush has excessive free play |2.4.A2a|i|| | 2 |
| Exhaust is leaking and excessively noisey |7.1.1b| | 2 |
| Front Front position lamp does not illuminate immediately when switched on (1.1.3a) | 2 |
| Offside Front Shock absorber has a serious fluid leak (5.3.2 (b)) | 2 |
| Rear Wheel spoke excessively loose (5.2.2 (d)) | 2 |
| Drive chain worn to excess (6.1.7 (c) (i)) | 2 |
| Front Wheel bearing rough when rotated (5.1.3 (b) (i)) | 2 |
| Drive chain so loose it is likely to fail (6.1.7 (c) (ii)) | 2 |
| Headlamp aim not tested (4.1.2 (b)) | 2 |
| Rear Rear reflector missing (4.8.2 (a) (ii)) | 2 |
| Horn not working (7.7 (a)) | 2 |