| Most common failures | No# failures |
|---|
| Headlamp aim out of alignment | 10 |
| Front Brake lever has inadequate reserve travel |3.1.3b| | 10 |
| Rear wheel spindle securing nut locking device missing |2.4.A.2b| | 5 |
| Drive chain excessively loose |6.2.1d| | 5 |
| Nearside Front Front shock absorber seal failed and leaking oil |2.3.3| | 4 |
| Horn not working |1.7.3a| | 4 |
| Stop lamp remains on when the brake is released |1.3.1e| | 4 |
| Wheel alignment incorrect which adversely affects the handling |2.5.1| | 3 |
| Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 3 |
| Front Stop lamp remains on when the brake is released |1.3.1e| | 3 |
| Rear reflector on motorcycle missing |1.4.1| | 3 |
| Offside Front shock absorber seal failed and leaking oil |2.3.3| | 3 |
| Drive chain worn to excess |6.2.1e| | 3 |
| Front Brake lever cannot be released smoothly |3.1.3d| | 2 |
| Floor brake test The less effective brake control does not achieve an efficiency of 25%. |3.3.C1b| | 2 |
| Rear Brake pedal has inadequate reserve travel |3.1.3b| | 2 |
| Nearside Front Shock absorber has a serious fluid leak (5.3.2 (b)) | 2 |
| Stop lamp remains on when the brakes are released | 2 |
| Front wheel bearings are excessively rough |2.3.5b| | 2 |
| Rear Drive chain sprocket worn to excess |6.2.1e| | 2 |
| Direction indicators not working |1.5.1c| | 2 |
| Rear Roller brake test indicates a sticking brake |3.3.A1a| | 2 |
| Roller brake test No brake control achieves an efficiency of 30%. |3.3.A2a| | 2 |
| Roller brake test Neither brake control achieves an efficiency of 25% |3.3.A2b| | 2 |
| Front Steering headbearing has excessive free play |2.2.2| | 2 |
| Handlebar mounting clamp loose |2.1.1a| | 2 |
| Front Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 2 |
| Front wheel spindle securing nut locking device missing |2.3.3a| | 2 |
| Front Roller brake test indicates a sticking brake |3.3.A1a| | 2 |
| Handlebar mounting clamp bolt loose |2.1.1a| | 2 |
| Front Direction indicator flashing more than 120 times per minute |1.5.1c| | 2 |
| Rear Direction indicator flashing more than 120 times per minute |1.5.1c| | 2 |
| Locking device|s| not correctly fitted which may make the motor bicycle dangerous to ride |6.2.1h| | 1 |
| Front position lamp does not illuminate immediately when switched on |1.1.3a| | 1 |
| Footrest insecure |6.2.1a| | 1 |
| Brake locking device missing |3.2.A1e| | 1 |
| Rear position lamp does not illuminate immediately when it is switched on |1.1.3a| | 1 |
| Drive chain sprocket carrier worn to excess |6.2.1e| | 1 |
| Front mudguard insecure |2.3.7| | 1 |
| Brake lever is inoperative |3.1.3c| | 1 |
| Brake component has restricted free movement and operation is likely to be impeded |3.2.A1h| | 1 |
| Rear Drive chain excessively loose |6.2.1d| | 1 |
| Front Front wheel spindle securing nut locking device missing |2.3.5a| | 1 |
| Rear Rear wheel spindle securing nut locking device missing |2.4.A.2b| | 1 |
| Front Stop lamp missing |1.3.3a| | 1 |
| Steering headbearing has excessive free play |2.2.2| | 1 |
| Exhaust has a major leak of exhaust gases |6.1.2 |a|| | 1 |
| Brake lever has insufficient reserve travel |1.1.2 |a|| | 1 |
| Offside Front Shock absorber has a serious fluid leak (5.3.2 (b)) | 1 |
| Front Brake excessively binding (1.2.1 (f)) | 1 |
| Steering headbearing has excessive wear or free play (2.2.2 (f) (i)) | 1 |
| Front Shock absorber has a serious fluid leak (5.3.2 (b)) | 1 |
| Offside Front Direction indicator not working (4.4.1 (a) (ii)) | 1 |
| Front wheel bearings have excessive free play |2.3.5b| | 1 |
| Front Drive chain sprocket worn to excess |6.2.1e| | 1 |
| Front suspension has inadequate damping effect. |2.3.6c| | 1 |
| Front Stop lamp does not emit a steady light |1.3.1b| | 1 |
| Front Front position lamp does not illuminate immediately when switched on |1.1.3a| | 1 |
| Front Brake lever has insufficient reserve travel (1.1.2 (a)) | 1 |
| Front Brake lever not releasing correctly and functionality of brakes affected (1.1.2 (b) (ii)) | 1 |
| Roller brake test The less effective brake control does not achieve an efficiency of 25% (1.2.2 (a) (i)) | 1 |
| Offside Front Brake lever excessively worn |1.1.15 |b|| | 1 |
| Nearside Front shock absorber seal failed and leaking oil |2.3.3| | 1 |
| Front wheel spindle securing nut|s| loose |2.3.3a| | 1 |
| Rear wheel spindle securing nut|s| loose |2.4.A.2b| | 1 |
| Brake drum|s| securing bolt|s| loose |3.2.A1g| | 1 |
| Locking devices not correctly fitted which may make the motor bicycle dangerous to ride |6.2.1h| | 1 |
| Front Headlamp insecure |1.2.3b| | 1 |
| Brake pedal has inadequate reserve travel |3.1.3b| | 1 |
| Rear Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 1 |
| Nearside Front Direction indicator not working |1.5.1c| | 1 |
| Throttle operating incorrectly (6.2.7 (a) (i)) | 1 |
| Nearside Direction indicator not working |1.5.1c| | 1 |
| Offside Direction indicator not working |1.5.1c| | 1 |
| Throttle has a significant change in engine speed whilst moving the steering from lock to lock |2.1.4| | 1 |
| Horn not loud enough to be heard by another road user |1.7.3a| | 1 |
| Direction indicators affected by the operation of another lamp |1.5.1c| | 1 |
| Offside Rear Wheel spoke cracked. |4.2.1b| | 1 |
| Front Brake lever is positioned so that the brake cannot be readily applied |3.1.3c| | 1 |
| Direction indicator not working |1.5.1c| | 1 |
| Front Brake lever pivots excessively worn |3.1.3a| | 1 |
| Brake lever has inadequate reserve travel |3.1.3b| | 1 |
| Headlamp at least one does not illuminate on dipped beam |1.2.2a|i|| | 1 |
| Drive chain excessively tight |6.2.1d| | 1 |
| Headlamp aim not tested |1.6| | 1 |
| Offside Front Direction indicator damaged and function impaired |1.5.3a| | 1 |
| Indicator switch defective |1.5.4| | 1 |
| Front Roller brake test indicates a binding brake |3.3.A1a| | 1 |
| Rear Brake lever has inadequate reserve travel |3.1.3b| | 1 |
| Rear Drive chain sprocket carrier worn to excess |6.2.1e| | 1 |
| Steering control handlebar movement restricted by taut cables |2.1.2c| | 1 |
| Drive chain horseshoe locking device incorrectly fitted (6.1.7 (j) (i)) | 1 |
| Nearside Front Direction indicators not working |1.5.1c| | 1 |
| Offside Direction indicators not working |1.5.1c| | 1 |
| Offside Handlebar handgrip not secure to handlebars. |2.1.1c| | 1 |
| Front Brake linkage has abnormal movement due to maladjustment |3.2.A1i| | 1 |
| Rear Brake locking device insecure |3.2.A1e| | 1 |
| Rear suspension bush has excessive free play |2.4.A2a|i|| | 1 |
| Rear Locking device|s| 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 |
| Registration plate issues | 1 |
| Rear position lamp damaged and function impaired |1.1.1b| | 1 |
| Roller brake test The less effective brake control does not achieve an efficiency of 25%. |3.3.A2b| | 1 |
| Headlamp at least one does not illuminate on main beam |1.2.2a|ii|| | 1 |
| Rear Brake locking device missing |3.2.A1e| | 1 |
| Direction indicators flashing more than 120 times per minute |1.5.1c| | 1 |
| Front wheel spindle securing nut locking device missing |2.3.5a| | 1 |