| Most common failures | No# failures |
|---|
| Headlamp aim out of alignment | 28 |
| Steering headbearing has excessive free play |2.2.2| | 22 |
| Rear reflector on motorcycle missing |1.4.1| | 16 |
| Roller brake test The less effective brake control does not achieve an efficiency of 25%. |3.3.A2b| | 15 |
| Front Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 10 |
| Rear Brake lever has inadequate reserve travel |3.1.3b| | 9 |
| Rear Roller brake test indicates a sticking brake |3.3.A1a| | 8 |
| Registration plate issues | 6 |
| Headlamp at least one does not illuminate on dipped beam |1.2.2a|i|| | 6 |
| Rear shock absorber has inadequate damping effect. |2.4.A.3b| | 6 |
| Rear position lamp does not illuminate immediately when it is switched on |1.1.3a| | 5 |
| Rear Stop lamp remains on when the brake is released |1.3.1e| | 5 |
| Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 5 |
| Fuel cap sealing washer missing |7.2.2c| | 5 |
| Exhaust mounting does not fully support the exhaust system |7.1.1.c| | 4 |
| Headlamp insecure |1.2.3b| | 4 |
| Front suspension has excessive stiffness in the suspension movement. |2.3.6b| | 4 |
| Rear Brake lever cannot be released smoothly |3.1.3d| | 4 |
| Headlamp at least one does not illuminate on main beam |1.2.2a|ii|| | 3 |
| Rear Roller brake test indicates excessive fluctuation of brake effort |3.3.A1d| | 3 |
| Horn not working |1.7.3a| | 3 |
| Rear Brake lever is so short and the brake cannot be readily applied |3.1.3c| | 3 |
| Indicator switch insecure |1.5.4| | 3 |
| Throttle operating incorrectly |6.2.1f| | 3 |
| Nearside Front Direction indicator not working |1.5.1c| | 3 |
| Horn not loud enough to be heard by another road user |1.7.3a| | 3 |
| Roller brake test No brake control achieves an efficiency of 30%. |3.3.A2a| | 3 |
| Front shock absorber seal failed and leaking oil |2.3.3| | 2 |
| Locking devices not correctly fitted which may make the motor bicycle dangerous to ride |6.2.1h| | 2 |
| Rear Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 2 |
| Front Fairings insecure and likely to impede the steering |2.1.2e| | 2 |
| Front Brake lever has inadequate reserve travel |3.1.3b| | 2 |
| Front Direction indicator flashing less than 60 times a minute |1.5.1c| | 2 |
| Rear Direction indicator flashing less than 60 times a minute |1.5.1c| | 2 |
| Direction indicators flashing less than 60 times a minute |1.5.1c| | 2 |
| Steering movement excessively stiff with the wheel raised |2.2.1b| | 2 |
| Headlamp aim headlamp deteriorated and function impaired |1.2.3a| | 2 |
| Rear Roller brake test indicates brake effort fall disproportional to brake lever or pedal effort |3.3.A1c| | 2 |
| Front Roller brake test indicates excessive fluctuation of brake effort |3.3.A1d| | 2 |
| Front Brake fluid reservoir fluid level dangerously low |3.2.B1d| | 2 |
| Stop lamp remains on when the brake is released |1.3.1e| | 2 |
| Rear position lamp adversely affected by the operation of another lamp |1.1.3b| | 2 |
| Front Steering headbearing has excessive wear or free play (2.2.2 (f) (i)) | 2 |
| Rear Brake drum|s| friction surface contaminated by oil or grease |3.2.A1k| | 1 |
| Front Brake disc contaminated |1.1.14 |b|| | 1 |
| Stop lamp adversely affected by the operation of another lamp |4.3.3 |b|| | 1 |
| Horn sound not in accordance with requirements |7.7 |c|| | 1 |
| All direction indicators adversely affected by the operation of another lamp |4.4.3 |b|| | 1 |
| Roller brake test The less effective brake control does not achieve an efficiency of 25% |1.2.2 |a| |i|| | 1 |
| Steering movement excessively rough with the weight on the lower bearing |2.2.1a| | 1 |
| Direction indicator insecure |1.5.3b| | 1 |
| Rear reflector on sidecar missing |1.4.1| | 1 |
| Front Brake disc|s| is excessively distorted |3.2.A1m| | 1 |
| Steering movement excessively `notchy` with the weight on the lower bearing |2.2.1a| | 1 |
| Front Front suspension has excessive stiffness in the suspension movement. |2.3.6b| | 1 |
| Front Front shock absorber seal failed and leaking oil |2.3.3| | 1 |
| Centre Rear Rear reflector on motorcycle missing |1.4.1| | 1 |
| Rear Rear shock absorber has inadequate damping effect. |2.4.A.3b| | 1 |
| Front Roller brake test indicates a sticking brake |3.3.A1a| | 1 |
| Headlamp aim headlamp damaged and function impaired |1.2.3a| | 1 |
| Brake linkage has abnormal movement due to maladjustment |3.2.A1i| | 1 |
| Nearside Brake lever is so short and the brake cannot be readily applied |3.1.3c| | 1 |
| Front Roller brake test indicates brake effort rise disproportional to brake lever or pedal effort |3.3.A1c| | 1 |
| Rear Brake lever insecure |3.1.2a| | 1 |
| Offside Direction indicators flashing less than 60 times a minute |1.5.1c| | 1 |
| Rear Brake lever is inoperative |3.1.3c| | 1 |
| Brake performance not tested |3.3| | 1 |
| Decelerometer brake test no brake control achieves an efficiency of 30% |3.3.E1a| | 1 |
| Decelerometer brake test neither brake control achieves an efficiency of 25% |3.3.E1c| | 1 |
| Indicator tell tale not functioning |1.5.2| | 1 |
| Front Stop lamp does not illuminate immediately a brake applies possibly brake light switch |1.3.1a| | 1 |
| Offside Rear Direction indicator not working |1.5.1c| | 1 |
| Offside Front Direction indicator insecure |1.5.3b| | 1 |
| Headlamp aim not tested |1.6| | 1 |
| Brake lever has inadequate reserve travel |3.1.3b| | 1 |
| Exhaust is leaking and excessively noisey |7.1.1b| | 1 |
| Nearside Direction indicators flashing more than 120 times per minute |1.5.1c| | 1 |
| Front Brake disc|s| excessively scored |3.2.A1l| | 1 |
| Front Exhaust is leaking and excessively noisey |7.1.1b| | 1 |
| Offside Front Direction indicator not working |1.5.1c| | 1 |
| Rear Rear wheel rotation likely to be impeded |6.2.1b| | 1 |
| Front Headlamp aim headlamp deteriorated and function impaired |1.2.3a| | 1 |
| Front Horn not loud enough to be heard by another road user |1.7.3a| | 1 |
| Front wheel bearings are excessively rough |2.3.5b| | 1 |
| Wheel alignment incorrect which adversely affects the steering forks bent |2.5.1| | 1 |
| Front suspension assembly component excessively bent |2.3.1| | 1 |
| Nearside Front Direction indicator insecure |1.5.3b| | 1 |
| Direction indicators not working |1.5.1c| | 1 |
| Nearside Rear Direction indicator not working |1.5.1c| | 1 |
| Position lamp switch insecure |1.1.4b| | 1 |
| Fairing insecure and likely to impede the steering |2.1.2e| | 1 |
| Fuel system component insecure |7.2.1b| | 1 |
| Front Motorcycle structure insecure and likely to affect the correct functioning of the steering or braking |6.1.1c| | 1 |
| 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| | 1 |
| Brake lever is positioned so that the brake cannot be readily applied |3.1.3c| | 1 |
| Roller brake test Neither brake control achieves an efficiency of 25% |3.3.A2b| | 1 |
| Nearside Brake lever insecure |3.1.2a| | 1 |
| Front Direction indicator insecure |1.5.3b| | 1 |
| Stop lamp affected by the operation of another lamp |1.3.2| | 1 |
| Nearside Direction indicator affected by the operation of another lamp |1.5.1c| | 1 |
| Offside Direction indicator affected by the operation of another lamp |1.5.1c| | 1 |
| Front mudguard insecure |2.3.7| | 1 |
| Rear suspension bush excessively deteriorated |2.4.A2a|i|| | 1 |
| Rear Roller brake test indicates a binding brake |3.3.A1a| | 1 |
| Front position lamp insecure |1.1.1c| | 1 |
| Rear position lamp missing |1.1.1a| | 1 |
| Offside Front Direction indicators not working |1.5.1c| | 1 |
| Nearside Indicator switch insecure |1.5.4| | 1 |
| Nearside Direction indicator not working not flashing |1.5.1c| | 1 |
| Front Brake caliper|s| insecure |3.2.A1j| | 1 |
| Motorcycle structure insecure and likely to affect the correct functioning of the steering or braking SIDE STAND LOOSE |6.1.1c| | 1 |
| Front position lamp does not illuminate immediately when switched on |1.1.3a| | 1 |
| Riders seat insecure |6.2.1a| | 1 |
| Offside Rear Direction indicators not working |1.5.1c| | 1 |
| Nearside Front Lower Roller brake test indicates a sticking brake |3.3.A1a| | 1 |
| Nearside Front Lower Headlamp at least one does not illuminate on dipped beam |1.2.2a|i|| | 1 |
| Rear Brake component has restricted free movement and operation is likely to be impeded |3.2.A1h| | 1 |
| Nearside Front shock absorber seal failed and leaking oil |2.3.3| | 1 |
| Front Brake disc|s| friction surface contaminated by oil or grease |3.2.A1k| | 1 |
| Floor brake test indicates a severely juddering brake |3.3C2d.| | 1 |
| Headlamp dipped beam affected by the operation of another lamp |1.2.2c| | 1 |
| Steering movement excessively `notchy` with the wheel raised |2.2.1b| | 1 |
| Steering movement excessively rough with the wheel raised |2.2.1b| | 1 |
| Front Brake hose is likely to be fouled or trapped by moving parts |3.2.B2c| | 1 |
| Rear wheel bearings are excessively rough |2.4.A.2c| | 1 |
| Offside Front Direction indicator damaged and function impaired |1.5.3a| | 1 |
| Brake lever is so short and the brake cannot be readily applied |3.1.3c| | 1 |
| Rear Floor brake test indicates a sticking brake |3.3.C2c| | 1 |
| Exhaust excessively deteriorated |7.1.1a| | 1 |
| Front Headlamp not working on main beam (4.1.1 (a) (ii)) | 1 |
| Suspension component modified so the suspension is inoperative suspension seized (5.3.3 (c) (ii)) | 1 |
| Front Upper Steering headbearing has excessive wear or free play (2.2.2 (f) (i)) | 1 |
| Rear Shock absorber insecurely attached (5.3.2 (a) (i)) | 1 |
| Rear Wheel bearing has excessive play (5.1.3 (a) (i)) | 1 |