| Most common failures | No# failures |
|---|
| Registration plate issues | 10 |
| Front Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 5 |
| Headlamp aim out of alignment | 5 |
| Headlamp dipped beam affected by the operation of another lamp |1.2.2c| | 4 |
| Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 4 |
| Rear position lamp does not illuminate immediately when it is switched on |1.1.3a| | 3 |
| Rear reflector on motorcycle missing |1.4.1| | 3 |
| Throttle operating incorrectly |6.2.1f| | 3 |
| Horn control not functioning. |1.7.2b| | 2 |
| Nearside Handlebar handgrip not secure to handlebars. |2.1.1c| | 2 |
| Handlebar mounting clamp bolt loose |2.1.1a| | 2 |
| Horn not working |1.7.3a| | 2 |
| Steering headbearing has excessive free play |2.2.2| | 2 |
| Front Stop lamp does not emit a steady light |1.3.1b| | 2 |
| Rear Wheel alignment incorrect which adversely affects the handling |2.5.1| | 2 |
| Nearside Headlamp switch insecure |1.2.4| | 1 |
| Front Headlamp dipped beam affected by the operation of another lamp |1.2.2c| | 1 |
| Headlamp main beam affected by the operation of another lamp |1.2.2c| | 1 |
| Direction indicators flashing more than 120 times per minute |1.5.1c| | 1 |
| Drive chain worn to excess |6.2.1e| | 1 |
| Rear Wheel spindle loose |5.2.1 |c| |i|| | 1 |
| Riders seat missing |6.2.1a| | 1 |
| Front position lamp does not illuminate immediately when switched on |1.1.3a| | 1 |
| Rear Direction indicator affected by the operation of another lamp |1.5.1c| | 1 |
| Rear Stop lamp affected by the operation of another lamp |1.3.2| | 1 |
| Horn is not a constant note |1.7.3c| | 1 |
| Front Stop lamp missing |1.3.3a| | 1 |
| Rear Rear reflector on motorcycle obscured |1.4.2b| | 1 |
| Rear Rear position lamp deteriorated and function impaired |1.1.1b| | 1 |
| Nearside Front Direction indicator not working |4.4.1 |a| |ii|| | 1 |
| Roller brake test No brake control achieves an efficiency of 30%. |3.3.A2a| | 1 |
| Roller brake test Neither brake control achieves an efficiency of 25% |3.3.A2b| | 1 |
| Offside Rear Direction indicators not working |1.5.1c| | 1 |
| Motorcycle structure insecure and likely to affect the correct functioning of the steering or braking |6.1.1c| | 1 |
| Front Roller brake test indicates a severely juddering brake |3.3.A1b| | 1 |
| Rear Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 1 |
| Rear Brake pedal has inadequate reserve travel |3.1.3b| | 1 |
| Fuel system component leaking |7.2.1a| | 1 |
| Headlamp aim so that beam "kick up" is not visible on the screen |1.6.B.1| | 1 |
| Front Roller brake test indicates brake effort fall disproportional to brake lever or pedal effort |3.3.A1c| | 1 |
| Headlamp dipped beam flickers when tapped lightly by hand |1.2.2c| | 1 |
| Rear Roller brake test indicates excessive fluctuation of brake effort |3.3.A1d| | 1 |
| Rear Roller brake test indicates a severely grabbing brake |3.3.A1b| | 1 |
| Wheel alignment incorrect which adversely affects the handling |2.5.1| | 1 |
| Drive chain excessively tight |6.2.1d| | 1 |
| Rear Brake reaction bracket securing bolt|s| loose |3.2.A1j| | 1 |
| Brake lever attachment screws loose |3.1.2b| | 1 |
| Locking device|s| not correctly fitted which may make the motor bicycle dangerous to ride |6.2.1h| | 1 |
| Centre Front Lower Motorcycle structure insecure and likely to affect the correct functioning of the steering or braking |6.1.1c| | 1 |
| Handlebar mounting insecure |2.2.1 |a| |i|| | 1 |
| Front Upper Steering headbearing has excessive wear or free play |2.2.2 |f| |i|| | 1 |
| Front Lower Steering headbearing has excessive wear or free play |2.2.2 |f| |i|| | 1 |
| Drive chain excessively loose |6.2.1d| | 1 |
| Direction indicators affected by the operation of another lamp |1.5.1c| | 1 |
| Horn not loud enough to be heard by another road user |1.7.3a| | 1 |
| Nearside Rear Direction indicators not working |1.5.1c| | 1 |
| Exhaust is leaking and excessively noisey |7.1.1b| | 1 |
| Headlamp switch faulty |1.2.4| | 1 |
| Nearside Steering lock stop maladjusted |2.1.3| | 1 |
| Front Brake locking device insecure |3.2.A1e| | 1 |
| Front Steering headbearing has excessive free play |2.2.2| | 1 |
| Roller brake test The less effective brake control does not achieve an efficiency of 25%. |3.3.A2b| | 1 |
| Rear Wheel spoke missing |4.2.1b| | 1 |
| Brake pedal insecure |3.1.2a| | 1 |
| Stop lamp does not emit a steady light |1.3.1b| | 1 |
| Rear reflector missing (4.8.2 (a) (ii)) | 1 |
| Roller brake test The less effective brake control does not achieve an efficiency of 25% (1.2.2 (a) (i)) | 1 |
| Horn not working (7.7 (a)) | 1 |
| Nearside Headlamp insecure (4.1.1 (c)) | 1 |
| Stop lamp does not illuminate by the operation of both brake controls (4.3.2 (a) (iii)) | 1 |
| Suspension arm ball joint excessively worn Swingarm (5.3.4 (a) (i)) | 1 |