| Most common failures | No# failures |
|---|
| Headlamp aim out of alignment | 321 |
| Registration plate issues | 197 |
| Rear Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 103 |
| Offside Rear Direction indicator not working |1.5.1c| | 81 |
| Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 74 |
| Headlamp at least one does not illuminate on dipped beam |1.2.2a|i|| | 72 |
| Rear position lamp does not illuminate immediately when it is switched on |1.1.3a| | 69 |
| Horn not loud enough to be heard by another road user |1.7.3a| | 66 |
| Offside Rear Direction indicators not working |1.5.1c| | 56 |
| Nearside Rear Direction indicator not working |1.5.1c| | 54 |
| Horn not working |1.7.3a| | 53 |
| Riders seat insecure |6.2.1a| | 43 |
| Offside Rear Direction indicator not working (4.4.1 (a) (ii)) | 40 |
| Front Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 39 |
| Rear wheel bearings have excessive free play |2.4.A.2c| | 36 |
| Nearside Rear Direction indicators not working |1.5.1c| | 35 |
| Nearside Front Direction indicator not working |1.5.1c| | 33 |
| Front position lamp does not illuminate immediately when switched on |1.1.3a| | 32 |
| Offside Front Direction indicator not working |1.5.1c| | 27 |
| Front wheel bearings have excessive free play |2.3.5b| | 25 |
| Rear reflector on motorcycle missing |1.4.1| | 25 |
| Headlamp not working on dipped beam (4.1.1 (a) (ii)) | 25 |
| Nearside Rear Direction indicator not working (4.4.1 (a) (ii)) | 24 |
| Stop lamp remains on when the brake is released |1.3.1e| | 24 |
| Steering movement excessively `notchy` with the wheel raised |2.2.1b| | 23 |
| Headlamp at least one does not illuminate on main beam |1.2.2a|ii|| | 22 |
| Steering headbearing has excessive free play |2.2.2| | 22 |
| Rear Brake pedal has inadequate reserve travel |3.1.3b| | 21 |
| Indicator tell tale not functioning |1.5.2| | 20 |
| Headlamp insecure |1.2.3b| | 19 |
| Exhaust is leaking and excessively noisey |7.1.1b| | 19 |
| Rear Position lamp not working (4.2.1 (a)) | 19 |
| Rear Stop lamp remains on when the brake is released |1.3.1e| | 17 |
| Front Roller brake test indicates a binding brake |3.3.A1a| | 17 |
| Rear wheel has a loose wheel nut|s| |4.2.3a| | 15 |
| Nearside Front Direction indicators not working |1.5.1c| | 14 |
| Front Brake lever cannot be applied smoothly |3.1.3d| | 14 |
| Horn not working (7.7 (a)) | 13 |
| Nearside Steering lock stop ineffective |2.1.3| | 13 |
| Rear Rear wheel bearings have excessive free play |2.4.A.2c| | 13 |
| Roller brake test The less effective brake control does not achieve an efficiency of 25%. |3.3.A2b| | 13 |
| Offside Rear Direction indicator not working |4.4.1 |a| |ii|| | 13 |
| Exhaust mounting does not fully support the exhaust system |7.1.1.c| | 13 |
| Stop lamp remains on when the brakes are released | 12 |
| Rear Roller brake test indicates a binding brake |3.3.A1a| | 12 |
| Front Stop lamp remains on when the brake is released |1.3.1e| | 12 |
| Headlamp not working on main beam (4.1.1 (a) (ii)) | 12 |
| 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 |
| Brake pedal has inadequate reserve travel |3.1.3b| | 11 |
| Steering headbearing has excessive wear or free play (2.2.2 (f) (i)) | 11 |
| Rear Stop lamp not working (4.3.1 (a) (ii)) | 11 |
| Throttle operating incorrectly |6.2.1f| | 11 |
| Rear Direction indicators not working |1.5.1c| | 11 |
| Front suspension assembly excessive wear or free play in a front suspension component |2.3.4| | 11 |
| Steering movement excessively `notchy` with the weight on the lower bearing |2.2.1a| | 10 |
| Rear wheel spindle securing nut|s| loose |2.4.A.2b| | 10 |
| Rear Brake pedal cannot be released smoothly |3.1.3d| | 10 |
| All direction indicators not working (4.4.1 (a) (ii)) | 10 |
| Offside Front Direction indicator not working (4.4.1 (a) (ii)) | 10 |
| Registration plate lamp issues | 10 |
| Nearside Rear Direction indicator incorrect colour |1.5.1b| | 9 |
| Front Brake disc|s| friction surface contaminated by oil or grease |3.2.A1k| | 9 |
| Horn sound not in accordance with requirements (7.7 (c)) | 9 |
| Direction indicators not working |1.5.1c| | 9 |
| Rear Roller brake test indicates a sticking brake |3.3.A1a| | 9 |
| Rear Rear position lamp does not illuminate immediately when it is switched on |1.1.3a| | 8 |
| Front Floor brake test indicates a binding brake |3.3.C2c| | 8 |
| Direction indicator not working |1.5.1c| | 8 |
| Rear Rear reflector on motorcycle missing |1.4.1| | 8 |
| Front Headlamp at least one does not illuminate on dipped beam |1.2.2a|i|| | 8 |
| Headlamp aim beam image kick up to the offside |1.6| | 8 |
| Nearside Front Direction indicator not working (4.4.1 (a) (ii)) | 8 |
| Rear position lamp incorrect colour |1.1.2b| | 8 |
| Front Brake grabbing severely (1.2.1 (c)) | 8 |
| Rear reflector missing (4.8.2 (a) (ii)) | 8 |
| Rear shock absorber insecurely mounted |2.4.A.3b| | 8 |
| Offside Front Direction indicators not working |1.5.1c| | 7 |
| Offside Front Direction indicator incorrect colour |1.5.1b| | 7 |
| Front Brake hose leaking fluid |3.2.B4| | 7 |
| Front Horn not loud enough to be heard by another road user |1.7.3a| | 7 |
| Rear Position lamp not working |4.2.1 |a|| | 7 |
| Floor brake test The less effective brake control does not achieve an efficiency of 25%. |3.3.C1b| | 7 |
| Front suspension has inadequate damping effect. |2.3.6c| | 7 |
| Headlamp dipped beam affected by the operation of another lamp |1.2.2c| | 7 |
| Exhaust excessively deteriorated |7.1.1a| | 7 |
| Rear Floor brake test indicates a sticking brake |3.3.C2c| | 7 |
| Stop lamp not working (4.3.1 (a) (ii)) | 7 |
| Rear position lamp adversely affected by the operation of another lamp |1.1.3b| | 7 |
| Rear Roller brake test indicates a severely grabbing brake |3.3.A1b| | 7 |
| Horn is not a constant note |1.7.3c| | 7 |
| Offside Indicator tell tale not functioning |1.5.2| | 7 |
| Rear wheel insecure |4.2.3b| | 7 |