| Most common failures | No# failures |
|---|
| Headlamp aim out of alignment | 22 |
| Headlamp aim beam image kick up to the offside |1.6| | 7 |
| Registration plate issues | 5 |
| Front Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 5 |
| Drive chain excessively loose |6.2.1d| | 5 |
| Rear Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 5 |
| Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 5 |
| Throttle has a significant change in engine speed whilst moving the steering from lock to lock |2.1.4| | 3 |
| Offside Front shock absorber seal failed and leaking oil |2.3.3| | 3 |
| Nearside Front shock absorber seal failed and leaking oil |2.3.3| | 3 |
| Steering headbearing has excessive free play |2.2.2| | 3 |
| Stop lamp affected by the operation of another lamp |1.3.2| | 2 |
| Stop lamp remains on when the brake is released |1.3.1e| | 2 |
| Steering movement excessively `notchy` with the wheel raised |2.2.1b| | 2 |
| Rear suspension bearing has excessive free play |2.4.A2a|i|| | 2 |
| Rear Drive chain sprocket worn to excess |6.2.1e| | 2 |
| Nearside Front Direction indicator not working |1.5.1c| | 2 |
| Fuel system component leaking |7.2.1a| | 2 |
| Brake pedal insecure |3.1.2a| | 2 |
| Front Headlamp aim beam image kick up to the offside |1.6| | 2 |
| Rear Rear position lamp does not illuminate immediately when it is switched on |1.1.3a| | 2 |
| Rear shock absorber seal failed and leaking oil |2.4.A.1c| | 1 |
| Rear Footrest missing |6.2.1a| | 1 |
| Rear Stop lamp damaged and function impaired |1.3.3a| | 1 |
| Front Headlamp aim beam image kick-up is to the offside |1.6.1| | 1 |
| Front Lower Front position lamp does not illuminate immediately when switched on |1.1.3a| | 1 |
| Front Upper Rear suspension bearing has excessive free play |2.4.A2a|i|| | 1 |
| Brake pedal cannot be released smoothly |3.1.3d| | 1 |
| Rear Brake performance not tested |3.3| | 1 |
| Roller brake test The less effective brake control does not achieve an efficiency of 25%. |3.3.A2b| | 1 |
| Front suspension assembly component missing |2.3.1| | 1 |
| Nearside Rear Lower Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 1 |
| Nearside Rear Direction indicator not working |4.4.1 |a| |ii|| | 1 |
| Rear Suspension component pin or bush excessively worn |5.3.4 |a| |i|| | 1 |
| Steering operation linkage fouling when handlebars turned from lock to lock |2.1.4 |a|| | 1 |
| Headlamp at least one does not illuminate on dipped beam |1.2.2a|i|| | 1 |
| Steering movement excessively `notchy` with the weight on the lower bearing |2.2.1a| | 1 |
| Nearside Front Brake disc|s| friction surface contaminated by oil or grease |3.2.A1k| | 1 |
| Rear position lamp does not illuminate immediately when it is switched on |1.1.3a| | 1 |
| Rear shock absorber has inadequate damping effect. |2.4.A.3b| | 1 |
| Rear position lamp insecure |1.1.1c| | 1 |
| Rear Hydraulic brake control feels spongy |3.1.4a| | 1 |
| Stop lamp does not illuminate immediately a brake applies rear switch |1.3.1a| | 1 |
| Rear Roller brake test indicates brake effort fall disproportional to brake lever or pedal effort |3.3.A1c| | 1 |
| Exhaust is leaking and excessively noisey |7.1.1b| | 1 |
| Offside Rear Direction indicator damaged and function impaired |1.5.3a| | 1 |
| Rear position lamp adversely affected by the operation of another lamp |1.1.3b| | 1 |
| Offside Front Footrest insecure |6.2.1a| | 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 wheel bearings are excessively rough |2.3.5b| | 1 |
| Rear position lamp incorrect colour |1.1.2b| | 1 |
| Front Steering lock stop missing |2.1.3| | 1 |
| Front wheel bearings have excessive free play |2.3.5b| | 1 |
| Offside Lower Locking devices not correctly fitted which may make the motor bicycle dangerous to ride |6.2.1h| | 1 |
| Offside Rear Direction indicator not working |1.5.1c| | 1 |
| Offside Front Direction indicator damaged and function impaired |1.5.3a| | 1 |
| Nearside Rear Direction indicator damaged and function impaired |1.5.3a| | 1 |
| Rear reflector on motorcycle missing |1.4.1| | 1 |
| Vehicle identification number not legible |6.3.5a| | 1 |
| Footrest missing |6.2.1a| | 1 |
| Brake component defective due to a deliberate modification which significantly reduces the original strength |3.1.5| | 1 |
| Front wheel spindle securing nut locking device insecure |2.3.3a| | 1 |
| Front Roller brake test indicates a binding brake |3.3.A1a| | 1 |
| Drive chain worn to excess |6.2.1e| | 1 |
| Rear Brake excessively binding |1.2.1 |f|| | 1 |
| Horn not working |7.7 |a| |ii|| | 1 |
| Rear Brake disc|s| excessively scored |3.2.A1l| | 1 |
| Nearside Rear Direction indicators not working |1.5.1c| | 1 |
| Rear Roller brake test indicates a binding brake |3.3.A1a| | 1 |
| Headlamp aim so that beam "kick up" is not visible on the screen |4.1.2 |a|| | 1 |
| Clutch lever shortened so it cannot be readily operated. |6.2.1g| | 1 |
| Offside Rear Lower Drive chain excessively tight |6.2.1d| | 1 |
| Nearside Front Fuel pipe union leaking |7.2.1a| | 1 |
| Offside Front Fuel tank leaking |7.2.1a| | 1 |
| Stop lamp emits other than a steady red light |1.3.1b| | 1 |
| Nearside Rear Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 1 |
| Nearside Front Decelerometer brake test indicates a binding brake |3.3.E1d| | 1 |
| Wheel alignment incorrect which adversely affects the steering |2.5.1| | 1 |
| Rear Rear wheel bearings have excessive free play |2.4.A.2c| | 1 |