| Most common failures | No# failures |
|---|
| Headlamp aim out of alignment | 14 |
| Horn not working |1.7.3a| | 6 |
| Headlamp at least one does not illuminate on main beam |1.2.2a|ii|| | 4 |
| Registration plate issues | 3 |
| Rear position lamp does not illuminate immediately when it is switched on |1.1.3a| | 3 |
| Headlamp at least one does not illuminate on dipped beam |1.2.2a|i|| | 3 |
| Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 2 |
| Headlamp insecure |1.2.3b| | 2 |
| Rear Rear reflector on motorcycle missing |1.4.1| | 2 |
| Steering headbearing has excessive free play |2.2.2| | 2 |
| Rear suspension bearing has excessive free play |2.4.A2a|i|| | 2 |
| Nearside Front Direction indicators not working |1.5.1c| | 2 |
| Nearside Front Front shock absorber seal failed and leaking oil |2.3.3| | 2 |
| Offside Rear shock absorber insecurely mounted |2.4.A.3b| | 1 |
| Front suspension assembly excessive wear or free play in a front suspension component |2.3.4| | 1 |
| Rear wheel bearings have excessive free play |2.4.A.2c| | 1 |
| Rear Brake pedal cannot be released smoothly |3.1.3d| | 1 |
| Locking devices not correctly fitted which may make the motor bicycle dangerous to ride |6.2.1h| | 1 |
| Fuel pipe leaking |7.2.1a| | 1 |
| Sidecar wheel bearings are excessively rough |5.2.3d| | 1 |
| Nearside Front Roller brake test indicates a severely juddering brake |3.3.A1b| | 1 |
| Offside Front Roller brake test indicates a severely juddering brake |3.3.A1b| | 1 |
| Rear Roller brake test indicates a severely juddering brake |3.3.A1b| | 1 |
| Roller brake test indicates a severely juddering brake |3.3.A1b| | 1 |
| Front Throttle has a significant change in engine speed whilst moving the steering from lock to lock |2.1.4| | 1 |
| Front Roller brake test indicates a binding brake |3.3.A1a| | 1 |
| Rear Stop lamp remains on when the brake is released |1.3.1e| | 1 |
| Steering control handlebar movement restricted by trapped cables |2.1.2c| | 1 |
| Rear Brake pedal attachment screws loose pivot point |3.1.2b| | 1 |
| Rear wheel spindle securing nut locking device missing nut replaced with lock nut |2.4.A.2b| | 1 |
| Front Upper Throttle operating incorrectly |6.2.1f| | 1 |
| Brake pedal attachment screws loose |3.1.2b| | 1 |
| Front Steering headbearing has excessive free play |2.2.2| | 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 |
| Rear Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 1 |
| Nearside Rear Direction indicator insecure |1.5.3b| | 1 |
| Offside Rear Direction indicator insecure |1.5.3b| | 1 |
| Nearside Front Brake disc|s| friction surface contaminated by oil or grease |3.2.A1k| | 1 |
| Front Front suspension assembly excessive wear or free play in a front suspension component |2.3.4| | 1 |
| Nearside Front shock absorber seal failed and leaking oil |2.3.3| | 1 |
| Nearside Front Direction indicator not working |1.5.1c| | 1 |
| Throttle operating incorrectly |6.2.1f| | 1 |
| Indicator tell tale not functioning |1.5.2| | 1 |
| Offside Rear Direction indicator not working |1.5.1c| | 1 |
| Front Handlebar handgrip not secure to handlebars. |2.1.1c| | 1 |
| Rear Lower Brake lever excessively corroded |3.2.A1c| | 1 |
| Steering movement excessively stiff with the wheel raised |2.2.1b| | 1 |
| Rear Rear position lamp does not illuminate immediately when it is switched on |1.1.3a| | 1 |
| Front Front suspension assembly component loose |2.3.1| | 1 |
| Front Fuel system component insecure |7.2.1b| | 1 |
| Nearside Rear Direction indicator incorrect colour |1.5.1b| | 1 |
| Centre Front Steering movement excessively `notchy` with the wheel raised |2.2.1b| | 1 |
| Rear Brake performance not tested |3.3| | 1 |
| Handlebar mounting clamp bolt loose |2.1.1a| | 1 |
| Headlamp incorrect colour |1.2.1| | 1 |
| Brake hose excessively deteriorated | 1 |
| Front Brake pipe inadequately supported |3.2.B2b| | 1 |
| Nearside Front Brake pipe inadequately supported |3.2.B2b| | 1 |
| Offside Front Brake pipe inadequately supported |3.2.B2b| | 1 |
| Rear Brake pedal pivots excessively worn |3.1.3a| | 1 |
| Lower Steering lock stop ineffective |2.1.3| | 1 |
| Steering control has Insufficient clearance at full lock affecting the riders grasp of handlebars |2.1.2b| | 1 |
| Upper Front suspension assembly component loose |2.3.1| | 1 |
| Offside Steering lock stop maladjusted |2.1.3| | 1 |
| Rear Roller brake test indicates brake effort rise disproportional to brake lever or pedal effort |3.3.A1c| | 1 |
| Front Wheel has an excessively distorted bead rim. |4.2.2| | 1 |
| Exhaust is leaking and excessively noisey |7.1.1b| | 1 |
| Roller brake test The less effective brake control does not achieve an efficiency of 25%. |3.3.A2b| | 1 |
| Centre Rear Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 1 |
| An item not tested |Manual| | 1 |
| Front Headlamp aim beam image kick-up is to the offside |1.6.1| | 1 |
| Offside Front shock absorber seal failed and leaking oil |2.3.3| | 1 |
| Brake pedal pivots excessively worn |3.1.3a| | 1 |
| Rear position lamp adversely affected by the operation of another lamp |1.1.3b| | 1 |
| Offside Handlebar handgrip not secure to handlebars. |2.1.1c| | 1 |
| Indicator tell tale not operating correctly |1.5.2| | 1 |
| Front Direction indicator flashing less than 60 times a minute |1.5.1c| | 1 |
| Rear shock absorber has inadequate damping effect. |2.4.A.3b| | 1 |
| Nearside Rear shock absorber insecurely mounted |2.4.A.3b| | 1 |
| Offside Fuel hose leaking |7.2.1a| | 1 |
| Horn is not continous or uniform |1.7.3c| | 1 |
| Front Floor brake test indicates a binding brake |3.3.C2c| | 1 |
| Central Rear Lower Rear suspension bush has excessive free play |2.4.A2a|i|| | 1 |
| Stop lamp remains on when the brake is released |1.3.1e| | 1 |
| Front Brake pedal is bent and the brake cannot be readily applied |3.1.3c| | 1 |
| Offside Fuel system component leaking |7.2.1a| | 1 |
| Offside Front Direction indicators not working |1.5.1c| | 1 |
| Brake disc|s| cracked |3.2.A1g| | 1 |