| Most common failures | No# failures |
|---|
| Horn not working |1.7.3a| | 11 |
| Headlamp aim out of alignment | 10 |
| Rear position lamp does not illuminate immediately when it is switched on |1.1.3a| | 8 |
| Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 6 |
| Rear Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 6 |
| Headlamp at least one does not illuminate on dipped beam |1.2.2a|i|| | 5 |
| Headlamp at least one does not illuminate on main beam |1.2.2a|ii|| | 4 |
| Roller brake test The less effective brake control does not achieve an efficiency of 25%. |3.3.A2b| | 4 |
| Rear Wheel spoke excessively loose |4.2.1b| | 3 |
| Front Headlamp at least one does not illuminate on dipped beam |1.2.2a|i|| | 3 |
| Locking device|s| not correctly fitted which may make the motor bicycle dangerous to ride |6.2.1h| | 3 |
| Throttle operating incorrectly |6.2.1f| | 3 |
| Front position lamp does not illuminate immediately when switched on |1.1.3a| | 3 |
| Front Headlamp at least one does not illuminate on main beam |1.2.2a|ii|| | 3 |
| Horn not loud enough to be heard by another road user |1.7.3a| | 3 |
| Stop lamp missing |1.3.3a| | 2 |
| Front Brake cable badly frayed |3.2.A1b| | 2 |
| Rear Rear reflector on motorcycle missing |1.4.1| | 2 |
| Rear reflector on motorcycle missing |1.4.1| | 2 |
| All position lamps do not illuminate immediately when switched on |1.1.3a| | 2 |
| Front Brake drum|s| insecure |3.2.A1g| | 2 |
| Front wheel bearings have excessive free play |2.3.5b| | 2 |
| Rear suspension bush has excessive free play |2.4.A2a|i|| | 2 |
| Front Footrest insecure |6.2.1a| | 2 |
| Wheel alignment incorrect which adversely affects the steering |2.5.1| | 2 |
| Front Front position lamp does not illuminate immediately when switched on |1.1.3a| | 2 |
| Rear wheel bearings have excessive free play |2.4.A.2c| | 2 |
| Offside Rear shock absorber insecurely mounted |2.4.A.3b| | 1 |
| Rear Roller brake test indicates a binding brake |3.3.A1a| | 1 |
| Front Front wheel bearings are excessively rough |2.3.5b| | 1 |
| Fuel cap sealing washer missing |7.2.2c| | 1 |
| Front Brake lever is inoperative |3.1.3c| | 1 |
| Steering headbearing has excessive free play |2.2.2| | 1 |
| Front Handlebar mounting clamp bolt loose |2.1.1a| | 1 |
| Rear Rear wheel bearings have excessive free play |2.4.A.2c| | 1 |
| Fuel system component leaking |7.2.1a| | 1 |
| Offside Rear Exhaust mounting does not fully support the exhaust system |7.1.1.c| | 1 |
| Rear Locking device|s| not correctly fitted which may make the motor bicycle dangerous to ride |6.2.1h| | 1 |
| Centre Front Upper Steering headbearing has excessive free play |2.2.2| | 1 |
| Rear Brake locking device insecure |3.2.A1e| | 1 |
| Front Roller brake test indicates brake effort rise disproportional to brake lever or pedal effort |3.3.A1c| | 1 |
| Rear Roller brake test indicates brake effort rise disproportional to brake lever or pedal effort |3.3.A1c| | 1 |
| Headlamp missing |1.2.3a| | 1 |
| Headlamp switch faulty |1.2.4| | 1 |
| Locking devices not correctly fitted which may make the motor bicycle dangerous to ride |6.2.1h| | 1 |
| Headlamp main beam affected by the operation of another lamp |1.2.2c| | 1 |
| Front position lamp missing |1.1.1a| | 1 |
| Front Front suspension assembly component loose |2.3.1| | 1 |
| Front Steering headbearing has excessive free play |2.2.2| | 1 |
| Rear position lamp missing |1.1.1a| | 1 |
| Front Brake lever cannot be released smoothly |3.1.3d| | 1 |
| Rear Rear position lamp does not illuminate immediately when it is switched on |1.1.3a| | 1 |
| Front Headlamp aim not tested |1.6| | 1 |
| Offside Rear Footrest insecure |6.2.1a| | 1 |
| Nearside Drive chain excessively tight |6.2.1d| | 1 |
| Brake pedal has inadequate reserve travel |3.1.3b| | 1 |
| Front Roller brake test indicates excessive fluctuation of brake effort |3.3.A1d| | 1 |
| Stop lamp does not emit a steady light |1.3.1b| | 1 |
| Rear wheel spindle securing nut|s| loose |2.4.A.2b| | 1 |
| Nearside Footrest insecure |6.2.1a| | 1 |
| Nearside Rear shock absorber insecurely mounted |2.4.A.3b| | 1 |
| Front suspension has inadequate damping effect. |2.3.6c| | 1 |
| Floor brake test The less effective brake control does not achieve an efficiency of 25%. |3.3.C1b| | 1 |
| Front Brake component is fractured |3.1.5| | 1 |
| Front Brake performance not tested |3.3| | 1 |
| Centre Rear Upper Riders seat insecure |6.2.1a| | 1 |
| Front Position lamp switch faulty |1.1.4a| | 1 |
| Rear Drive chain worn to excess |6.2.1e| | 1 |
| Sidecar rear position lamp does not illuminate immediately when it is switched on |1.1.3a| | 1 |
| Front Wheel has an excessively distorted bead rim. |4.2.2| | 1 |
| Centre Front Upper Fuel system component insecure |7.2.1b| | 1 |
| Fuel cap sealing washer torn |7.2.2c| | 1 |
| Headlamp aim beam image too far to the right |1.6.4| | 1 |
| Front Roller brake test indicates a severely grabbing brake |3.3.A1b| | 1 |
| Rear Roller brake test indicates excessive fluctuation of brake effort |3.3.A1d| | 1 |
| Front Direction indicators flashing more than 120 times per minute |1.5.1c| | 1 |
| Stop lamp insecure |1.3.3b| | 1 |