| Most common failures | No# failures |
|---|
| Registration plate issues | 96 |
| Rear reflector on motorcycle missing |1.4.1| | 69 |
| Headlamp aim out of alignment | 62 |
| Rear position lamp does not illuminate immediately when it is switched on |1.1.3a| | 28 |
| Front wheel bearings have excessive free play |2.3.5b| | 24 |
| Rear wheel bearings have excessive free play |2.4.A.2c| | 21 |
| Rear Wheel spoke excessively loose |4.2.1b| | 19 |
| Rear Rear reflector on motorcycle missing |1.4.1| | 17 |
| Front position lamp does not illuminate immediately when switched on |1.1.3a| | 14 |
| Headlamp at least one does not illuminate on dipped beam |1.2.2a|i|| | 13 |
| Horn not working |1.7.3a| | 12 |
| Front Wheel spoke excessively loose |4.2.1b| | 10 |
| Front Front wheel bearings have excessive free play |2.3.5b| | 9 |
| Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 9 |
| Front wheel bearings are excessively rough |2.3.5b| | 9 |
| Front Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 8 |
| Drive chain excessively loose |6.2.1d| | 7 |
| Rear Position lamp not working (4.2.1 (a)) | 7 |
| Rear Rear wheel bearings have excessive free play |2.4.A.2c| | 6 |
| Throttle operating incorrectly |6.2.1f| | 6 |
| Drive chain worn to excess |6.2.1e| | 6 |
| Rear Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 6 |
| Wheel alignment incorrect which adversely affects the handling |2.5.1| | 6 |
| Steering headbearing has excessive free play |2.2.2| | 5 |
| Rear Rear position lamp does not illuminate immediately when it is switched on |1.1.3a| | 5 |
| 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| | 5 |
| Headlamp at least one does not illuminate on main beam |1.2.2a|ii|| | 5 |
| Nearside Handlebar handgrip not secure to handlebars. |2.1.1c| | 5 |
| Rear reflector missing (4.8.2 (a) (ii)) | 5 |
| Nearside Rear Direction indicator not working |1.5.1c| | 4 |
| Horn not working |7.7 |a| |ii|| | 4 |
| Rear reflector missing |4.8.2 |a| |ii|| | 4 |
| Steering movement excessively `notchy` with the wheel raised |2.2.1b| | 4 |
| Front Brake disc|s| has excessive run out |3.2.A1m| | 4 |
| Direction indicators not working |1.5.1c| | 4 |
| Front Front wheel bearings are excessively rough |2.3.5b| | 4 |
| Registration plate lamp issues | 4 |
| Offside Rear Direction indicator not working |1.5.1c| | 4 |
| Front Wheel has an excessively distorted bead rim. |4.2.2| | 3 |
| Roller brake test The less effective brake control does not achieve an efficiency of 25%. |3.3.A2b| | 3 |
| Rear Brake disc|s| excessively worn |3.2.A1l| | 3 |
| Front Headlamp at least one does not illuminate on dipped beam |1.2.2a|i|| | 3 |
| Stop lamp remains on when the brake is released |1.3.1e| | 3 |
| Front Stop lamp remains on when the brake is released |1.3.1e| | 3 |
| Offside Rear Direction indicators not working |1.5.1c| | 3 |
| Headlamp not working on dipped beam (4.1.1 (a) (ii)) | 3 |
| Headlamp not working on main beam (4.1.1 (a) (ii)) | 3 |
| Nearside Front shock absorber seal failed and leaking oil |2.3.3| | 2 |
| Headlamp aim beam image kick up to the offside |1.6| | 2 |
| Throttle has a significant change in engine speed whilst moving the steering from lock to lock |2.1.4| | 2 |
| Rear Drive chain excessively tight |6.2.1d| | 2 |
| Horn missing |1.7.1| | 2 |
| Rear Drive chain excessively loose |6.2.1d| | 2 |
| Front Horn not working |1.7.3a| | 2 |
| Rear 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| | 2 |
| Rear Floor brake test indicates a binding brake |3.3.C2c| | 2 |
| Front Headlamp aim beam image kick up to the offside |1.6| | 2 |
| Locking device|s| not correctly fitted which may make the motor bicycle dangerous to ride |6.2.1h| | 2 |
| Fuel system component insecure |7.2.1b| | 2 |
| Steering movement excessively stiff with the wheel raised |2.2.1b| | 2 |
| Brake lever has inadequate reserve travel |3.1.3b| | 2 |
| Front Drive chain sprocket worn to excess |6.2.1e| | 2 |
| Stop lamp affected by the operation of another lamp |1.3.2| | 2 |
| Rear Drive chain sprocket worn to excess |6.2.1e| | 2 |
| Horn control defective |1.7.2a| | 2 |
| Horn not loud enough to be heard by another road user |1.7.3a| | 2 |
| Rear Brake fluid reservoir fluid level dangerously low |3.2.B1d| | 2 |
| Fuel system component leaking |7.2.1a| | 2 |
| Rear Position lamp not working |4.2.1 |a|| | 2 |
| Front Roller brake test indicates a binding brake |3.3.A1a| | 2 |
| Front Wheel has an excessively eccentric bead rim. |4.2.2| | 2 |
| Direction indicator missing |1.5.1a| | 2 |
| Centre Rear Rear reflector on motorcycle missing |1.4.1| | 2 |
| Rear Rear reflector missing (4.8.2 (a) (ii)) | 2 |
| Stop lamp not working (4.3.1 (a) (ii)) | 2 |
| Front Wheel bearing play so excessive it is likely to break up (5.1.3 (a) (ii)) | 2 |
| Drive chain excessively tight (6.1.7 (k) (i)) | 2 |
| Rear Stop lamp not working (4.3.1 (a) (ii)) | 2 |
| Front Position lamp not working (4.2.1 (a)) | 2 |
| Horn not working (7.7 (a) (ii)) | 2 |