| Most common failures | No# failures |
|---|
| Headlamp aim out of alignment | 27 |
| Drive chain excessively loose |6.2.1d| | 13 |
| Rear reflector on motorcycle missing |1.4.1| | 12 |
| Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 10 |
| Front wheel bearings are excessively rough |2.3.5b| | 9 |
| Front Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 6 |
| Drive chain worn to excess |6.2.1e| | 6 |
| Nearside Rear Footrest missing |6.2.1a| | 5 |
| Registration plate issues | 5 |
| Offside Rear Footrest missing |6.2.1a| | 4 |
| Wheel alignment incorrect which adversely affects the handling |2.5.1| | 4 |
| Rear Drive chain sprocket worn to excess |6.2.1e| | 4 |
| Rear reflector on motorcycle obscured |1.4.1| | 4 |
| Front wheel bearings have excessive free play |2.3.5b| | 4 |
| Riders seat insecure |6.2.1a| | 4 |
| Headlamp insecure |1.2.3b| | 3 |
| Steering headbearing has excessive free play |2.2.2| | 3 |
| Rear Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 3 |
| Horn not working |1.7.3a| | 3 |
| Stop lamp remains on when the brake is released |1.3.1e| | 3 |
| Direction indicators flashing more than 120 times per minute |1.5.1c| | 2 |
| Rear Wheel alignment incorrect which adversely affects the handling |2.5.1| | 2 |
| Rear Drive chain excessively loose |6.2.1d| | 2 |
| Front Roller brake test indicates excessive fluctuation of brake effort |3.3.A1d| | 2 |
| Nearside Handlebar handgrip not secure to handlebars. |2.1.1c| | 2 |
| Rear Brake lining|s| less than 1.5 mm thick |3.2.A1f|i|| | 2 |
| Rear suspension movement is excessively stiff |2.4.A.3b| | 2 |
| Front Wheel spoke excessively loose |4.2.1b| | 2 |
| Steering headbearing has excessive wear or free play (2.2.2 (f) (i)) | 2 |
| Headlamp at least one does not illuminate on dipped beam |1.2.2a|i|| | 2 |
| Front Roller brake test indicates a sticking brake |3.3.A1a| | 2 |
| Brake pedal has inadequate reserve travel |3.1.3b| | 2 |
| Rear position lamp does not illuminate immediately when it is switched on |1.1.3a| | 2 |
| Throttle operating incorrectly |6.2.1f| | 2 |
| Front Roller brake test indicates a binding brake |3.3.A1a| | 2 |
| Exhaust mounting does not fully support the exhaust system |7.1.1.c| | 2 |
| Nearside Rear Footrest insecure |6.2.1a| | 2 |
| Nearside Front shock absorber seal failed and leaking oil |2.3.3| | 2 |
| Rear shock absorber insecurely mounted |2.4.A.3b| | 1 |
| Rear Footrest missing |6.2.1a| | 1 |
| Offside Front Front wheel bearings have excessive free play |2.3.5b| | 1 |
| Rear position lamp does not face the rear |1.1.1d| | 1 |
| Rear position lamp incorrect colour |1.1.2b| | 1 |
| Rear shock absorber has inadequate damping effect. |2.4.A.3b| | 1 |
| Offside Footrest insecure |6.2.1a| | 1 |
| Drive chain sprocket so loose it is likely to fail (6.1.7 (c) (ii)) | 1 |
| Drive chain excessively loose |6.1.7 |c| |i|| | 1 |
| Nearside Rear Direction indicator not working |4.4.1 |a| |ii|| | 1 |
| Centre Rear Upper Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 1 |
| Rear Drive chain excessively tight |6.2.1d| | 1 |
| Drive chain so loose it is likely to fail |6.1.7 |c| |ii|| | 1 |
| Rear Brake lining|s| less than 1.0 mm thick |1.1.13 |a|| | 1 |
| Roller brake test The less effective brake control does not achieve an efficiency of 25% |1.2.2 |a| |i|| | 1 |
| Nearside Direction indicator flashing more than 120 times per minute |1.5.1c| | 1 |
| Offside Direction indicator flashing more than 120 times per minute |1.5.1c| | 1 |
| Outer Front Upper Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 1 |
| Centre Rear Lower Rear wheel bearings have excessive free play |2.4.A.2c| | 1 |
| Centre Front Lower Locking devices not correctly fitted which may make the motor bicycle dangerous to ride |6.2.1h| | 1 |
| Outer Front Lower Drive chain sprocket worn to excess |6.2.1e| | 1 |
| Centre Rear Lower Drive chain sprocket worn to excess |6.2.1e| | 1 |
| Outer Front Lower Drive chain worn to excess |6.2.1e| | 1 |
| Centre Front Upper Direction indicators not working |1.5.1c| | 1 |
| Centre Rear Lower Brake lining|s| less than 1.5 mm thick |3.2.A1f|i|| | 1 |
| Nearside Front Upper Clutch lever shortened so it cannot be readily operated. |6.2.1g| | 1 |
| Roller brake test The less effective brake control does not achieve an efficiency of 25%. |3.3.A2b| | 1 |
| Offside Front Direction indicator not working |1.5.1c| | 1 |
| Rear wheel spindle securing nut locking device missing |2.4.A.2b| | 1 |
| Rear Footrest insecure |6.2.1a| | 1 |
| Front Front suspension has inadequate damping effect. |2.3.6c| | 1 |
| Rear Rear suspension movement is excessively stiff |2.4.A.3b| | 1 |
| Rear Wheel bearing play so excessive it is likely to break up (5.1.3 (a) (ii)) | 1 |
| Drive chain excessively tight |6.2.1d| | 1 |
| Wheel spoke excessively loose |4.2.1b| | 1 |
| Rear Drive chain worn to excess |6.2.1e| | 1 |
| Rear Rear position lamp does not illuminate immediately when it is switched on |1.1.3a| | 1 |
| Nearside Rear Direction indicator damaged and function impaired |1.5.3a| | 1 |
| Rear Rear position lamp adversely affected by the operation of another lamp |1.1.3b| | 1 |
| Rear Brake pedal has inadequate reserve travel |3.1.3b| | 1 |
| Steering movement excessively `notchy` with the weight on the lower bearing |2.2.1a| | 1 |
| Headlamp at least one does not illuminate on main beam |1.2.2a|ii|| | 1 |
| Locking device|s| not correctly fitted which may make the motor bicycle dangerous to ride |6.2.1h| | 1 |
| Fuel system component leaking |7.2.1a| | 1 |
| Rear Shock absorber has negligible damping effect |5.3.2 |b|| | 1 |
| Handlebar deformed |2.1.1b| | 1 |
| Front Front wheel bearings have excessive free play |2.3.5b| | 1 |
| Rear Front wheel bearings have excessive free play |2.3.5b| | 1 |
| Rear mono-shock pivot seized |2.4.B.4| | 1 |
| Stop lamp remains on when the brakes are released | 1 |
| Rear Roller brake test indicates a severely grabbing brake |3.3.A1b| | 1 |
| Nearside Direction indicators not working Nearside front and rear indicators inoperative |1.5.1c| | 1 |
| Nearside Rear Direction indicator incorrect colour |1.5.1b| | 1 |
| Offside Rear Direction indicator incorrect colour |1.5.1b| | 1 |
| Front Brake disc|s| excessively worn |3.2.A1l| | 1 |
| Headlamp missing |1.2.3a| | 1 |
| Front Headlamp insecure (4.1.1 (c)) | 1 |
| Front Position lamp not working (4.2.1 (a)) | 1 |
| Nearside Front Motorcycle structure joining/attachment plate or fastening insecure grip loose (6.1.1 (b) (i)) | 1 |
| Rear Roller brake test indicates excessive fluctuation of brake effort |3.3.A1d| | 1 |
| Rear position lamp adversely affected by the operation of another lamp |1.1.3b| | 1 |
| Rear Stop lamp remains on when the brake is released |1.3.1e| | 1 |
| Rear mono-shock insecure rear mono-shock snapped at bottom |2.4.B.4| | 1 |
| Front Horn not working |1.7.3a| | 1 |
| Horn not loud enough to be heard by another road user |1.7.3a| | 1 |
| Brake pedal cannot be released smoothly |3.1.3d| | 1 |
| Front Stop lamp not working |4.3.1 |a| |ii|| | 1 |
| Rear Stop lamp not working |4.3.1 |a| |ii|| | 1 |
| Front Front position lamp does not illuminate immediately when switched on |1.1.3a| | 1 |
| Front suspension has inadequate damping effect. |2.3.6c| | 1 |
| Rear suspension bush has excessive free play |2.4.A2a|i|| | 1 |
| Steering movement excessively `notchy` with the wheel raised |2.2.1b| | 1 |
| Rear reflector on sidecar incorrectly positioned |1.4.2d| | 1 |
| Stop lamp not working (4.3.1 (a) (ii)) | 1 |
| Rear reflector on motorcycle obscured |1.4.2b| | 1 |
| Offside Front shock absorber seal failed and leaking oil |2.3.3| | 1 |
| Nearside Front Shock absorber has a serious fluid leak (5.3.2 (b)) | 1 |
| Offside Riders seat insecure |6.2.1a| | 1 |
| Rear Roller brake test indicates a binding brake |3.3.A1a| | 1 |
| Offside Front Direction indicators not working |1.5.1c| | 1 |
| Stop lamp not working Control 2 (4.3.1 (a) (ii)) | 1 |
| Front Brake disc|s| has excessive run out |3.2.A1m| | 1 |