| Most common failures | No# failures |
|---|
| Rear Brake lever has inadequate reserve travel |3.1.3b| | 47 |
| Headlamp aim out of alignment | 39 |
| Front Roller brake test indicates a binding brake |3.3.A1a| | 36 |
| Roller brake test The less effective brake control does not achieve an efficiency of 25%. |3.3.A2b| | 26 |
| Exhaust is leaking and excessively noisey |7.1.1b| | 23 |
| Front suspension has excessive stiffness in the suspension movement. |2.3.6b| | 22 |
| Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 21 |
| Registration plate issues | 16 |
| Rear position lamp does not illuminate immediately when it is switched on |1.1.3a| | 15 |
| Front Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 12 |
| Rear Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 12 |
| Front Front suspension has excessive stiffness in the suspension movement. |2.3.6b| | 11 |
| Front Brake disc|s| excessively worn |3.2.A1l| | 10 |
| Rear Stop lamp remains on when the brake is released |1.3.1e| | 9 |
| Rear Rear shock absorber has inadequate damping effect. |2.4.A.3b| | 9 |
| Direction indicators affected by the operation of another lamp |1.5.1c| | 9 |
| Offside Rear Direction indicator incorrect colour |1.5.1b| | 8 |
| Headlamp insecure |1.2.3b| | 8 |
| Front Floor brake test indicates a binding brake |3.3.C2c| | 8 |
| Horn not working |1.7.3a| | 8 |
| Headlamp at least one does not illuminate on dipped beam |1.2.2a|i|| | 8 |
| Rear shock absorber has inadequate damping effect. |2.4.A.3b| | 8 |
| Nearside Rear Direction indicator insecure |1.5.3b| | 7 |
| Steering headbearing has excessive free play |2.2.2| | 7 |
| Riders seat insecure |6.2.1a| | 7 |
| Front Roller brake test indicates a sticking brake |3.3.A1a| | 7 |
| Stop lamp remains on when the brake is released |1.3.1e| | 7 |
| Steering movement excessively stiff with the wheel raised |2.2.1b| | 7 |
| Stop lamp affected by the operation of another lamp |1.3.2| | 6 |
| Roller brake test No brake control achieves an efficiency of 30%. |3.3.A2a| | 5 |
| Offside Rear Direction indicator damaged and function impaired |1.5.3a| | 5 |
| Direction indicators not working |1.5.1c| | 5 |
| Front Headlamp insecure |1.2.3b| | 5 |
| Exhaust excessively deteriorated |7.1.1a| | 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 |
| Rear Exhaust is leaking and excessively noisey |7.1.1b| | 5 |
| Direction indicators flashing less than 60 times a minute |1.5.1c| | 5 |
| Front wheel bearings have excessive free play |2.3.5b| | 4 |
| Rear Roller brake test indicates a binding brake |3.3.A1a| | 4 |
| Offside Front Direction indicator not working |1.5.1c| | 4 |
| Front Brake fluid reservoir fluid level dangerously low |3.2.B1d| | 4 |
| Front Floor brake test indicates a sticking brake |3.3.C2c| | 4 |
| Headlamp at least one does not illuminate on main beam |1.2.2a|ii|| | 4 |
| Wheel alignment incorrect which adversely affects the handling |2.5.1| | 4 |
| Front position lamp does not illuminate immediately when switched on |1.1.3a| | 4 |
| Nearside Rear Direction indicators not working |1.5.1c| | 4 |
| Steering movement excessively `notchy` with the weight on the lower bearing |2.2.1a| | 4 |
| Roller brake test Neither brake control achieves an efficiency of 25% |3.3.A2b| | 4 |
| Nearside Front Direction indicator damaged and function impaired |1.5.3a| | 4 |
| Horn not loud enough to be heard by another road user |1.7.3a| | 4 |
| Steering movement excessively `notchy` with the wheel raised |2.2.1b| | 4 |
| Direction indicators flashing more than 120 times per minute |1.5.1c| | 4 |
| Rear Brake lever cannot be released smoothly |3.1.3d| | 3 |
| Front Brake lining|s| less than 1.5 mm thick |3.2.A1f|i|| | 3 |
| Headlamp aim not tested |1.6| | 3 |
| Rear suspension bush excessively deteriorated |2.4.A2a|i|| | 3 |
| Front wheel bearings are excessively rough |2.3.5b| | 3 |
| Rear Brake lever attachment screws loose |3.1.2b| | 3 |
| Nearside Front Brake lever has inadequate reserve travel |3.1.3b| | 3 |
| Exhaust mounting does not fully support the exhaust system |7.1.1.c| | 3 |
| Front Horn not working |1.7.3a| | 3 |
| Rear Floor brake test indicates a sticking brake |3.3.C2c| | 3 |
| Direction indicator affected by the operation of another lamp |1.5.1c| | 3 |
| Offside Front Direction indicators not working |1.5.1c| | 3 |
| Front Steering headbearing has excessive free play |2.2.2| | 3 |
| Nearside Front Direction indicator not working |1.5.1c| | 3 |
| Rear Brake component has restricted free movement and operation is likely to be impeded |3.2.A1h| | 3 |
| Rear Roller brake test indicates brake effort fall disproportional to brake lever or pedal effort |3.3.A1c| | 3 |
| Vehicle identification number not permanently displayed |6.3.5a| | 3 |
| Front Brake disc|s| excessively scored |3.2.A1l| | 3 |
| Brake lever has inadequate reserve travel |3.1.3b| | 3 |
| Front Brake caliper|s| insecure |3.2.A1j| | 3 |
| Horn control defective |1.7.2a| | 3 |
| Front Roller brake test indicates brake effort rise disproportional to brake lever or pedal effort |3.3.A1c| | 3 |
| Front Plate brake test indicates a binding brake |3.3.B1a| | 3 |
| Front Front position lamp does not illuminate immediately when switched on |1.1.3a| | 3 |
| Rear Brake lever insecure |3.1.2a| | 3 |
| Front Brake disc|s| has excessive run out |3.2.A1m| | 3 |
| Front Brake component worn and seriously reduced in strength |3.2.A1| | 2 |
| Front Stop lamp affected by the operation of another lamp |1.3.2| | 2 |
| Rear Stop lamp affected by the operation of another lamp |1.3.2| | 2 |
| Offside Exhaust is leaking and excessively noisey |7.1.1b| | 2 |
| Locking devices not correctly fitted which may make the motor bicycle dangerous to ride |6.2.1h| | 2 |
| Front Headlamp aim not tested |1.6| | 2 |
| Nearside Rear suspension bush excessively deteriorated |2.4.A2a|i|| | 2 |
| Offside Rear Direction indicator not working |1.5.1c| | 2 |
| Rear Roller brake test indicates a sticking brake |3.3.A1a| | 2 |
| Front Brake cylinder leaking hydraulic fluid |3.2.B1e| | 2 |
| Offside Direction indicator not working |1.5.1c| | 2 |
| Headlamp main beam affected by the operation of another lamp |1.2.2c| | 2 |
| Brake fluid reservoir fluid level dangerously low |3.2.B1d| | 2 |
| Front Front position lamp insecure |1.1.1c| | 2 |
| Front suspension has inadequate damping effect. |2.3.6c| | 2 |
| Front Brake component has restricted free movement and operation is likely to be impeded |3.2.A1h| | 2 |
| Nearside Brake lever has inadequate reserve travel |3.1.3b| | 2 |
| Wheel alignment incorrect which adversely affects the steering |2.5.1| | 2 |
| Nearside Front Direction indicators not working |1.5.1c| | 2 |
| Rear Rear position lamp does not illuminate immediately when it is switched on |1.1.3a| | 2 |
| Front position lamp adversely affected by the operation of another lamp |1.1.3b| | 2 |
| Rear position lamp adversely affected by the operation of another lamp |1.1.3b| | 2 |
| Stop lamp affected by the operation of the horn |1.3.2| | 2 |
| Offside Rear Direction indicators not working |1.5.1c| | 2 |
| Front Brake disc|s| friction surface contaminated by oil or grease |3.2.A1k| | 2 |
| Rear Roller brake test indicates brake effort rise disproportional to brake lever or pedal effort |3.3.A1c| | 2 |
| Front Brake performance not tested |3.3| | 2 |
| Nearside Rear Direction indicator damaged and function impaired |1.5.3a| | 2 |
| Rear Direction indicator insecure |1.5.3b| | 2 |
| Stop lamp remains on when the brakes are released | 2 |
| Steering control fouling between components which interferes with the free movement of the steering |2.1.2a| | 2 |
| Front Brake master cylinder fluid level dangerously low |3.2.B1d| | 2 |
| Front Stop lamp remains on when the brake is released |1.3.1e| | 2 |
| Rear Brake lining|s| less than 1.5 mm thick |3.2.A1f|i|| | 2 |
| Front position lamp insecure |1.1.1c| | 2 |
| Fairing insecure and likely to impede the steering |2.1.2e| | 2 |
| Nearside Front Fairings insecure and likely to impede the steering |2.1.2e| | 2 |
| Rear reflector on motorcycle missing |1.4.1| | 2 |
| All position lamps adversely affected by the operation of another lamp |1.1.3b| | 2 |
| Nearside Front Roller brake test indicates a sticking brake |3.3.A1a| | 2 |
| Brake lever cannot be applied smoothly |3.1.3d| | 2 |
| Throttle operating incorrectly |6.2.1f| | 2 |