| Most common failures | No# failures |
|---|
| Headlamp aim out of alignment | 41 |
| Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 35 |
| Headlamp at least one does not illuminate on dipped beam |1.2.2a|i|| | 25 |
| Rear position lamp does not illuminate immediately when it is switched on |1.1.3a| | 25 |
| Roller brake test The less effective brake control does not achieve an efficiency of 25%. |3.3.A2b| | 23 |
| Steering headbearing has excessive free play |2.2.2| | 22 |
| Headlamp at least one does not illuminate on main beam |1.2.2a|ii|| | 20 |
| Brake pedal has inadequate reserve travel |3.1.3b| | 20 |
| Horn not working |1.7.3a| | 17 |
| Registration plate issues | 16 |
| Rear Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 14 |
| Front Brake lever has inadequate reserve travel |3.1.3b| | 13 |
| Rear shock absorber has inadequate damping effect. |2.4.A.3b| | 12 |
| Rear Brake pedal has inadequate reserve travel |3.1.3b| | 12 |
| Horn not loud enough to be heard by another road user |1.7.3a| | 10 |
| Front position lamp does not illuminate immediately when switched on |1.1.3a| | 9 |
| Throttle operating incorrectly |6.2.1f| | 6 |
| Headlamp aim not tested |1.6| | 6 |
| Rear Rear position lamp does not illuminate immediately when it is switched on |1.1.3a| | 6 |
| All position lamps do not illuminate immediately when switched on |1.1.3a| | 6 |
| Headlamp main beam affected by the operation of the horn |1.2.2c| | 5 |
| Riders seat insecure |6.2.1a| | 5 |
| Floor brake test The less effective brake control does not achieve an efficiency of 25%. |3.3.C1b| | 5 |
| Front wheel bearings have excessive free play |2.3.5b| | 4 |
| Headlamp dipped beam affected by the operation of the horn |1.2.2c| | 4 |
| Rear Brake pedal pivots excessively worn |3.1.3a| | 4 |
| Exhaust is leaking and excessively noisey |7.1.1b| | 4 |
| Brake lever has inadequate reserve travel |3.1.3b| | 4 |
| Stop lamp affected by the operation of another lamp |1.3.2| | 4 |
| Exhaust mounting does not fully support the exhaust system |7.1.1.c| | 4 |
| Front Headlamp at least one does not illuminate on dipped beam |1.2.2a|i|| | 4 |
| Front Horn not working |1.7.3a| | 4 |
| Rear shock absorber insecurely mounted |2.4.A.3b| | 3 |
| Rear Brake lever has inadequate reserve travel |3.1.3b| | 3 |
| Rear Roller brake test indicates excessive fluctuation of brake effort |3.3.A1d| | 3 |
| Headlamp insecure |1.2.3b| | 3 |
| Nearside Steering lock stop ineffective |2.1.3| | 3 |
| Handlebar mounting clamp loose |2.1.1a| | 3 |
| An item not tested |Manual| | 3 |
| Rear Roller brake test indicates brake effort rise disproportional to brake lever or pedal effort |3.3.A1c| | 3 |
| Front Steering headbearing has excessive free play |2.2.2| | 3 |
| Front Riders seat insecure |6.2.1a| | 3 |
| Front suspension assembly component loose |2.3.1| | 3 |
| Steering movement excessively stiff with the wheel raised |2.2.1b| | 3 |
| All position lamps adversely affected by the operation of the horn |1.1.3b| | 2 |
| Steering movement excessively `notchy` with the wheel raised |2.2.1b| | 2 |
| Headlamp dipped beam affected by the operation of another lamp |1.2.2c| | 2 |
| Headlamp aim headlamp deteriorated and function impaired |1.2.3a| | 2 |
| Roller brake test No brake control achieves an efficiency of 30%. |3.3.A2a| | 2 |
| Rear wheel insecure |4.2.3b| | 2 |
| Wheel alignment incorrect which adversely affects the handling |2.5.1| | 2 |
| Front Brake back plate|s| insecure |3.2.A1j| | 2 |
| Rear wheel bearings have excessive free play |2.4.A.2c| | 2 |
| 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 position lamp adversely affected by the operation of the horn |1.1.3b| | 2 |
| Handlebar mounting clamp bolt loose |2.1.1a| | 2 |
| Rear Exhaust mounting does not fully support the exhaust system |7.1.1.c| | 2 |
| Front Roller brake test indicates a sticking brake |3.3.A1a| | 2 |
| Front Front position lamp does not illuminate immediately when switched on |1.1.3a| | 2 |
| Front Wheel has an excessively distorted bead rim. |4.2.2| | 2 |
| Rear Rear shock absorber has inadequate damping effect. |2.4.A.3b| | 2 |
| Rear Roller brake test indicates a binding brake |3.3.A1a| | 2 |
| Horn not working (7.7 (a) (ii)) | 2 |