| Most common failures | No# failures |
|---|
| Headlamp aim out of alignment | 12 |
| Steering headbearing has excessive free play |2.2.2| | 5 |
| Rear Brake locking device missing |3.2.A1e| | 4 |
| Horn not working |1.7.3a| | 2 |
| Drive chain excessively tight |6.2.1d| | 2 |
| Rear shock absorber has inadequate damping effect. |2.4.A.3b| | 2 |
| Front Brake pipe union leaking fluid |3.2.B4| | 2 |
| Direction indicators not working |1.5.1c| | 2 |
| Direction indicators affected by the operation of another lamp |1.5.1c| | 2 |
| Rear Wheel spoke missing |4.2.1b| | 2 |
| Fuel system component leaking |7.2.1a| | 2 |
| Brake hose excessively deteriorated | 2 |
| Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 2 |
| Offside Front Front wheel spindle securing nut locking device missing |2.3.3a| | 1 |
| Nearside Rear Front wheel spindle securing nut locking device missing |2.3.3a| | 1 |
| Offside Rear Brake reaction bracket insecure |3.2.A1j| | 1 |
| Offside Front Brake disc|s| insecure |3.2.A1g| | 1 |
| Offside Front Brake disc|s| has excessive run out |3.2.A1m| | 1 |
| Offside Front Roller brake test indicates excessive fluctuation of brake effort |3.3.A1d| | 1 |
| Chain guard insecure |6.2.1c| | 1 |
| Rear shock absorber insecurely mounted |2.4.A.3b| | 1 |
| Rear Direction indicator damaged and function impaired |1.5.3a| | 1 |
| Horn not loud enough to be heard by another road user |1.7.3a| | 1 |
| Front position lamp adversely affected by the operation of another lamp |1.1.3b| | 1 |
| Drive chain excessively loose |6.2.1d| | 1 |
| Rear Footrest missing |6.2.1a| | 1 |
| Front Front suspension has inadequate damping effect. |2.3.6c| | 1 |
| Front Front shock absorber seal failed and leaking oil |2.3.3| | 1 |
| Rear Wheel spoke excessively loose |4.2.1b| | 1 |
| Nearside Front Direction indicator not working |1.5.1c| | 1 |
| Locking device|s| not correctly fitted which may make the motor bicycle dangerous to ride |6.2.1h| | 1 |
| Rear suspension bush has excessive free play |2.4.A2a|i|| | 1 |
| Roller brake test The less effective brake control does not achieve an efficiency of 25%. |3.3.A2b| | 1 |
| Front Roller brake test indicates excessive fluctuation of brake effort |3.3.A1d| | 1 |
| Rear suspension movement is excessively stiff |2.4.A.3b| | 1 |
| Rear Locking device|s| not correctly fitted which may make the motor bicycle dangerous to ride |6.2.1h| | 1 |
| Nearside Front Front shock absorber seal failed and leaking oil |2.3.3| | 1 |
| Front Fuel tank leaking |7.2.1a| | 1 |
| Offside Rear shock absorber seal failed and leaking oil |2.4.A.1c| | 1 |
| Headlamp not working on main beam |4.1.1 |a| |ii|| | 1 |
| Headlamp not working on dipped beam |4.1.1 |a| |ii|| | 1 |
| Front wheel spindle securing nut locking device missing |2.3.3a| | 1 |
| Front Brake disc|s| friction surface contaminated by oil or grease |3.2.A1k| | 1 |
| Front Direction indicators affected by the operation of another lamp |1.5.1c| | 1 |
| Rear Direction indicators flashing less than 60 times a minute |1.5.1c| | 1 |
| Rear suspension bearing has excessive free play |2.4.A2a|i|| | 1 |
| Nearside Rear Footrest missing |6.2.1a| | 1 |
| Offside Rear Footrest missing |6.2.1a| | 1 |
| Throttle has a significant change in engine speed whilst moving the steering from lock to lock |2.1.4| | 1 |
| Offside 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 sticking brake |3.3.A1a| | 1 |
| Rear position lamp does not illuminate immediately when it is switched on |1.1.3a| | 1 |
| Registration plate issues | 1 |
| Rear suspension bush has excessive free play Swinging-arm pivot |2.4.A2a|i|| | 1 |
| Brake component has restricted free movement and operation is likely to be impeded |3.2.A1h| | 1 |
| Nearside Front Handlebar handgrip not secure to handlebars. |2.1.1c| | 1 |
| Headlamp at least one does not illuminate on dipped beam |1.2.2a|i|| | 1 |
| Rear reflector on motorcycle missing |1.4.1| | 1 |
| Offside Front Footrest insecure Rubber footrest loose |6.2.1a| | 1 |
| Central Front Front mudguard insecure |2.3.7| | 1 |
| Nearside Front Fuel system component leaking |7.2.1a| | 1 |
| Central Front Horn not working |1.7.3a| | 1 |
| Offside Front Throttle operating incorrectly |6.2.1f| | 1 |
| Nearside Handlebar handgrip not secure to handlebars. |2.1.1c| | 1 |
| Offside Front Footrest insecure |6.2.1a| | 1 |
| Rear Brake reaction bracket securing bolt|s| loose |3.2.A1j| | 1 |
| Front Brake hose fouling |3.2.B3b| | 1 |
| Centre Front Steering headbearing has excessive free play |2.2.2| | 1 |
| Rear Brake component has restricted free movement and operation is likely to be impeded |3.2.A1h| | 1 |
| Drive chain worn to excess |6.2.1e| | 1 |
| Fork yoke cracked |2.1.1b| | 1 |
| Front Brake locking device missing |3.2.A1e| | 1 |
| Front mudguard insecure |2.3.7| | 1 |
| Offside Rear Direction indicator not working |1.5.1c| | 1 |
| Offside Rear Direction indicator insecure |1.5.3b| | 1 |
| Rear wheel insecure |4.2.3b| | 1 |
| Nearside Rear Lower Rear shock absorber insecurely mounted |2.4.A.3b| | 1 |
| Offside Rear Lower Rear shock absorber insecurely mounted |2.4.A.3b| | 1 |