| Most common failures | No# failures |
|---|
| Headlamp aim out of alignment | 15 |
| Rear reflector on motorcycle missing |1.4.1| | 14 |
| Horn not loud enough to be heard by another road user |1.7.3a| | 9 |
| Headlamp at least one does not illuminate on dipped beam |1.2.2a|i|| | 8 |
| Registration plate issues | 6 |
| Stop lamp remains on when the brake is released |1.3.1e| | 6 |
| Horn not working |1.7.3a| | 6 |
| Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 6 |
| Front Headlamp at least one does not illuminate on dipped beam |1.2.2a|i|| | 5 |
| Front Roller brake test indicates a sticking brake |3.3.A1a| | 5 |
| Direction indicators not working |1.5.1c| | 5 |
| Direction indicators affected by the operation of another lamp |1.5.1c| | 5 |
| Rear position lamp does not illuminate immediately when it is switched on |1.1.3a| | 5 |
| Wheel alignment incorrect which adversely affects the handling |2.5.1| | 5 |
| Rear wheel bearings have excessive free play |2.4.A.2c| | 5 |
| Offside Front shock absorber seal failed and leaking oil |2.3.3| | 4 |
| Headlamp at least one does not illuminate on main beam |1.2.2a|ii|| | 4 |
| Front Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 4 |
| Rear Roller brake test indicates a sticking brake |3.3.A1a| | 4 |
| Front wheel spindle securing nut locking device missing |2.3.5a| | 4 |
| Front position lamp does not illuminate immediately when switched on |1.1.3a| | 4 |
| Drive chain excessively loose |6.2.1d| | 4 |
| Drive chain worn to excess |6.2.1e| | 4 |
| Nearside Rear Direction indicator not working |1.5.1c| | 4 |
| Front Brake lever has inadequate reserve travel |3.1.3b| | 4 |
| Rear Rear reflector on motorcycle missing |1.4.1| | 4 |
| Steering headbearing has excessive free play |2.2.2| | 4 |
| Nearside Handlebar handgrip not secure to handlebars. |2.1.1c| | 4 |
| Locking device|s| not correctly fitted which may make the motor bicycle dangerous to ride |6.2.1h| | 3 |
| Nearside Front shock absorber seal failed and leaking oil |2.3.3| | 3 |
| Wheel alignment incorrect which adversely affects the steering |2.5.1| | 3 |
| Stop lamp affected by the operation of another lamp |1.3.2| | 3 |
| Rear wheel spindle securing nut locking device missing |2.4.A.2b| | 3 |
| Rear Drive chain sprocket worn to excess |6.2.1e| | 3 |
| Roller brake test The less effective brake control does not achieve an efficiency of 25%. |3.3.A2b| | 3 |
| Rear Brake pedal has inadequate reserve travel |3.1.3b| | 3 |
| Front Headlamp at least one does not illuminate on main beam |1.2.2a|ii|| | 2 |
| Steering movement excessively `notchy` with the weight on the lower bearing |2.2.1a| | 2 |
| Direction indicator flashing less than 60 times a minute |1.5.1c| | 2 |
| Rear wheel spindle securing nut|s| loose |2.4.A.2b| | 2 |
| Offside Rear Direction indicator not working |1.5.1c| | 2 |
| Offside Front Direction indicator flashing less than 60 times a minute |1.5.1c| | 2 |
| Front Floor brake test indicates a binding brake |3.3.C2c| | 2 |
| Front Wheel has an excessively distorted bead rim. |4.2.2| | 2 |
| Front Floor brake test indicates a severely grabbing brake |3.3.C2d| | 2 |
| Rear Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 2 |
| Stop lamp affected by the operation of the horn |1.3.2| | 2 |
| Brake lever has inadequate reserve travel |3.1.3b| | 2 |
| Direction indicator affected by the operation of another lamp |1.5.1c| | 2 |
| Horn is not a constant note |1.7.3c| | 2 |
| Front wheel bearings have excessive free play |2.3.5b| | 2 |
| Front Direction indicator not working |1.5.1c| | 2 |
| Rear position lamp adversely affected by the operation of another lamp |1.1.3b| | 2 |
| Front Direction indicator affected by the operation of another lamp |1.5.1c| | 2 |
| Front Horn not loud enough to be heard by another road user |1.7.3a| | 2 |
| Front Brake linkage has abnormal movement due to maladjustment |3.2.A1i| | 2 |
| Nearside Front Direction indicator not working |1.5.1c| | 2 |
| Offside Front Direction indicator not working |1.5.1c| | 2 |
| Front Stop lamp remains on when the brake is released |1.3.1e| | 2 |
| Rear reflector missing (4.8.2 (a) (ii)) | 2 |
| Direction indicators flashing less than 60 times a minute |1.5.1c| | 2 |
| Front shock absorber seal failed and leaking oil |2.3.3| | 2 |
| Steering movement excessively `notchy` with the wheel raised |2.2.1b| | 2 |
| Front Direction indicators affected by the operation of another lamp |1.5.1c| | 2 |
| Riders seat insecure |6.2.1a| | 2 |
| Rear Brake locking device missing |3.2.A1e| | 2 |
| Handlebar deformed |2.1.1b| | 2 |
| Front Floor brake test indicates a sticking brake |3.3.C2c| | 2 |
| Exhaust is leaking and excessively noisey |7.1.1b| | 2 |
| Rear Brake lining|s| less than 1.5 mm thick |3.2.A1f|i|| | 2 |
| Nearside Front Front shock absorber seal failed and leaking oil |2.3.3| | 2 |
| Rear Wheel spoke excessively loose |4.2.1b| | 2 |
| Rear Roller brake test indicates a binding brake |3.3.A1a| | 2 |
| Front Roller brake test indicates a binding brake |3.3.A1a| | 2 |
| Front suspension has inadequate damping effect. |2.3.6c| | 2 |
| Front Direction indicators flashing more than 120 times per minute |1.5.1c| | 2 |
| Rear Drive chain worn to excess |6.2.1e| | 2 |
| Horn is not continous or uniform |1.7.3c| | 2 |
| Front Horn not working |1.7.3a| | 2 |
| Front Steering headbearing has excessive free play |2.2.2| | 2 |
| All position lamps adversely affected by the operation of another lamp |1.1.3b| | 2 |
| All direction indicators not working |4.4.1 |a| |ii|| | 1 |
| Horn not working |7.7 |a| |ii|| | 1 |
| Rear Direction indicator missing |1.5.1a| | 1 |
| Nearside Direction indicator not working |1.5.1c| | 1 |
| Headlamp not working on dipped beam (4.1.1 (a) (ii)) | 1 |
| Headlamp not working on main beam (4.1.1 (a) (ii)) | 1 |
| Registration plate lamp issues | 1 |
| All direction indicators light intensity significantly reduced (4.4.3 (a)) | 1 |
| Rear Position lamp light intensity significantly reduced (4.2.3 (a) (ii)) | 1 |
| Front Position lamp not working (4.2.1 (a)) | 1 |
| Offside Rear Lower Shock absorber insecurely attached (5.3.2 (a) (i)) | 1 |
| Front Wheel spindle locking device missing (5.2.1 (d)) | 1 |
| Exhaust mounting missing |7.1.1c| | 1 |
| All position lamps do not illuminate immediately when switched on |1.1.3a| | 1 |
| Rear Brake reaction bracket insecure |3.2.A1j| | 1 |
| Direction indicator deteriorated and function impaired |1.5.3a| | 1 |
| Nearside Rear Direction indicator insecure |1.5.3b| | 1 |
| Front suspension assembly component excessively misaligned |2.3.1| | 1 |
| Front wheel spindle securing nut locking device missing |2.3.3a| | 1 |
| Offside Fuel tank leaking |7.2.1a| | 1 |
| Direction indicator not working |1.5.1c| | 1 |
| Direction indicator flashing more than 120 times per minute |1.5.1c| | 1 |
| Nearside Front Brake drum|s| securing bolt|s| loose |3.2.A1g| | 1 |
| Rear Floor brake test indicates a severely grabbing brake |3.3.C2d| | 1 |
| Horn control not functioning. |1.7.2b| | 1 |
| Front position lamp adversely affected by the operation of the horn |1.1.3b| | 1 |
| Rear position lamp adversely affected by the operation of the horn |1.1.3b| | 1 |
| Drive chain fouling another component |6.2.1d| | 1 |
| Offside Rear Brake reaction bracket securing bolt|s| loose |3.2.A1j| | 1 |
| Rear Direction indicator not working |1.5.1c| | 1 |
| Rear Direction indicator affected by the operation of another lamp |1.5.1c| | 1 |
| Drive chain sprocket carrier worn to excess |6.2.1e| | 1 |
| Offside Rear Exhaust is leaking and excessively noisey |7.1.1b| | 1 |
| Nearside Direction indicators not working |1.5.1c| | 1 |
| Offside Direction indicators not working |1.5.1c| | 1 |
| Front Wheel spoke excessively loose |4.2.1b| | 1 |
| Front Brake lever cannot be released smoothly |3.1.3d| | 1 |
| Nearside Direction indicators flashing less than 60 times a minute |1.5.1c| | 1 |
| Offside Direction indicators flashing less than 60 times a minute |1.5.1c| | 1 |
| Steering headbearing has excessive wear or free play (2.2.2 (f) (i)) | 1 |
| Offside Rear Footrest missing (6.2.12 (a)) | 1 |
| Nearside Rear Footrest missing (6.2.12 (a)) | 1 |
| Nearside Direction indicators flashing more than 120 times per minute |1.5.1c| | 1 |
| Offside Direction indicators flashing more than 120 times per minute |1.5.1c| | 1 |
| Rear reflector on motorcycle obscured |1.4.2b| | 1 |
| Stop lamp remains on when the brake is released front brake |1.3.1e| | 1 |
| Brake locking device missing rear brake lower torque arm |3.2.A1e| | 1 |
| Rear reflector on sidecar missing |1.4.1| | 1 |
| Front Steering movement excessively stiff with the weight on the lower bearing |2.2.1a| | 1 |
| Nearside Front Direction indicators affected by the operation of another lamp |1.5.1c| | 1 |
| Offside Front Direction indicators affected by the operation of another lamp |1.5.1c| | 1 |
| Nearside Rear Direction indicators affected by the operation of another lamp |1.5.1c| | 1 |
| Offside Rear Direction indicators affected by the operation of another lamp |1.5.1c| | 1 |
| Centre Horn is not continous or uniform |1.7.3c| | 1 |
| Offside Indicator tell tale not functioning |1.5.2| | 1 |
| Offside Handlebar handgrip not secure to handlebars. |2.1.1c| | 1 |
| Fuel system component insecure |7.2.1b| | 1 |
| Rear Brake reaction bracket securing bolt|s| loose |3.2.A1j| | 1 |
| Upper Front position lamp does not illuminate immediately when switched on |1.1.3a| | 1 |
| Brake lever excessively damaged |3.2.A1c| | 1 |
| Rear Floor brake test indicates a sticking brake |3.3.C2c| | 1 |
| Rear Floor brake test indicates a binding brake |3.3.C2c| | 1 |
| Front Drive chain sprocket worn to excess |6.2.1e| | 1 |
| Front Front shock absorber seal failed and leaking oil |2.3.3| | 1 |
| Front Roller brake test indicates a severely grabbing brake |3.3.A1b| | 1 |
| Front Steering movement excessively `notchy` with the weight on the lower bearing |2.2.1a| | 1 |
| Locking devices not correctly fitted which may make the motor bicycle dangerous to ride |6.2.1h| | 1 |
| Front Brake lever cannot be applied smoothly |3.1.3d| | 1 |
| Rear Brake pedal is positioned so that the brake cannot be readily applied |3.1.3c| | 1 |
| Nearside Front Direction indicator damaged and function impaired |1.5.3a| | 1 |
| Horn not working (7.7 (a)) | 1 |
| Rear Wheel spoke excessively loose (5.2.2 (d)) | 1 |
| Front position lamp missing |1.1.1a| | 1 |
| Front Brake locking device missing |3.2.A1e| | 1 |
| Front Brake pipe inadequately supported |3.2.B2b| | 1 |
| Nearside Rear Lower Locking device|s| not correctly fitted which may make the motor bicycle dangerous to ride |6.2.1h| | 1 |
| Rear Wheel spoke excessively bent |4.2.1b| | 1 |
| Floor brake test The less effective brake control does not achieve an efficiency of 25%. |3.3.C1b| | 1 |
| Nearside Direction indicators affected by the operation of another lamp |1.5.1c| | 1 |
| Offside Direction indicators affected by the operation of another lamp |1.5.1c| | 1 |
| Rear Direction indicators flashing more than 120 times per minute |1.5.1c| | 1 |
| Nearside Rear Direction indicator damaged and function impaired |1.5.3a| | 1 |
| Drive chain sprocket worn to excess |6.2.1e| | 1 |
| Nearside Rear Rear shock absorber seal failed and leaking oil |2.4.A.1c| | 1 |
| Front Brake component has restricted free movement and operation is likely to be impeded |3.2.A1h| | 1 |
| Offside Rear 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 Front Shock absorber has a serious fluid leak (5.3.2 (b)) | 1 |
| Clutch lever shortened so it cannot be readily operated. |6.2.1g| | 1 |
| Stop lamp damaged and function impaired |1.3.3a| | 1 |
| Rear Direction indicators affected by the operation of another lamp |1.5.1c| | 1 |
| Rear Stop lamp affected by the operation of another lamp |1.3.2| | 1 |
| Rear reflector on motorcycle does not reflect squarely to the rear |1.4.1| | 1 |
| Front Horn control defective |1.7.2a| | 1 |
| Rear Headlamp at least one does not illuminate on main beam |1.2.2a|ii|| | 1 |
| Headlamp dipped beam affected by the operation of another lamp |1.2.2c| | 1 |
| Headlamp switch faulty |1.2.4| | 1 |
| Throttle has a significant change in engine speed whilst moving the steering from lock to lock |2.1.4| | 1 |
| Front Direction indicators flashing less than 60 times a minute |1.5.1c| | 1 |
| Rear Direction indicators flashing less than 60 times a minute |1.5.1c| | 1 |
| Front Front position lamp insecure |1.1.1c| | 1 |
| Nearside Front Upper Direction indicators flashing less than 60 times a minute |1.5.1c| | 1 |
| Offside Rear Upper Direction indicators flashing less than 60 times a minute |1.5.1c| | 1 |
| Centre Rear Upper Direction indicators affected by the operation of another lamp |1.5.1c| | 1 |
| Centre Front Upper Horn not loud enough to be heard by another road user |1.7.3a| | 1 |
| Rear reflector on motorcycle obscured |1.4.1| | 1 |
| Nearside Front Direction indicators flashing less than 60 times a minute |1.5.1c| | 1 |
| Nearside Rear Direction indicators flashing less than 60 times a minute |1.5.1c| | 1 |
| Offside Front Direction indicators flashing less than 60 times a minute |1.5.1c| | 1 |
| Offside Rear Direction indicators flashing less than 60 times a minute |1.5.1c| | 1 |
| Front Steering movement excessively rough with the wheel raised |2.2.1b| | 1 |