| Most common failures | No# failures |
|---|
| Headlamp aim out of alignment | 31 |
| Front Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 11 |
| Rear position lamp does not illuminate immediately when it is switched on |1.1.3a| | 11 |
| Registration plate issues | 8 |
| Locking device|s| not correctly fitted which may make the motor bicycle dangerous to ride |6.2.1h| | 8 |
| Nearside Handlebar handgrip not secure to handlebars. |2.1.1c| | 7 |
| Nearside Front shock absorber seal failed and leaking oil |2.3.3| | 7 |
| Rear reflector on motorcycle missing |1.4.1| | 6 |
| Front position lamp does not illuminate immediately when switched on |1.1.3a| | 6 |
| Drive chain excessively tight |6.2.1d| | 5 |
| Wheel alignment incorrect which adversely affects the handling |2.5.1| | 5 |
| Offside Front shock absorber seal failed and leaking oil |2.3.3| | 5 |
| Horn not working |1.7.3a| | 5 |
| Roller brake test The less effective brake control does not achieve an efficiency of 25%. |3.3.A2b| | 4 |
| Horn not loud enough to be heard by another road user |1.7.3a| | 4 |
| Rear Brake locking device missing |3.2.A1e| | 4 |
| Offside Front Direction indicator not working |1.5.1c| | 4 |
| Steering movement excessively `notchy` with the wheel raised |2.2.1b| | 4 |
| Rear Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 3 |
| Rear Drive chain excessively loose |6.2.1d| | 3 |
| Headlamp insecure |1.2.3b| | 3 |
| Rear wheel bearings have excessive free play |2.4.A.2c| | 3 |
| Steering headbearing has excessive free play |2.2.2| | 3 |
| Rear wheel spindle securing nut locking device missing |2.4.A.2b| | 3 |
| Rear shock absorber has inadequate damping effect. |2.4.A.3b| | 3 |
| Drive chain worn to excess |6.2.1e| | 3 |
| Throttle operating incorrectly |6.2.1f| | 3 |
| Headlamp at least one does not illuminate on dipped beam |1.2.2a|i|| | 3 |
| Direction indicators not working |1.5.1c| | 2 |
| Drive chain excessively loose |6.2.1d| | 2 |
| Rear suspension component excessively corroded. |2.4.A.1a| | 2 |
| Nearside Rear Direction indicator insecure |1.5.3b| | 2 |
| Rear Locking devices not correctly fitted which may make the motor bicycle dangerous to ride |6.2.1h| | 2 |
| Front Roller brake test indicates a binding brake |3.3.A1a| | 2 |
| Rear Motorcycle structure excessively corroded |6.1.1a| | 2 |
| Headlamp dipped beam affected by the operation of another lamp |1.2.2c| | 2 |
| Nearside Footrest insecure |6.2.1a| | 2 |
| Offside Front Direction indicators not working |1.5.1c| | 2 |
| Stop lamp affected by the operation of another lamp |1.3.2| | 2 |
| Nearside Front Front shock absorber seal failed and leaking oil |2.3.3| | 2 |
| Rear Roller brake test indicates brake effort rise disproportional to brake lever or pedal effort |3.3.A1c| | 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 |
| 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 |
| Nearside Rear shock absorber has inadequate damping effect. |2.4.A.3b| | 2 |
| Offside Rear shock absorber has inadequate damping effect. |2.4.A.3b| | 2 |
| Nearside Direction indicators not working |1.5.1c| | 2 |
| Direction indicators flashing more than 120 times per minute |1.5.1c| | 2 |
| Centre Front Headlamp at least one does not illuminate on main beam |1.2.2a|ii|| | 1 |
| Outer Front Headlamp insecure |1.2.3b| | 1 |
| Offside Rear Lower Locking devices not correctly fitted which may make the motor bicycle dangerous to ride |6.2.1h| | 1 |
| Rear Stop lamp not working bulb |4.3.1 |a| |ii|| | 1 |
| Offside Rear Exhaust system insecure bolt loose |6.1.2 |a|| | 1 |
| Nearside Front Fuel hose insecure (6.1.3 (a) (i)) | 1 |
| Front Front shock absorber seal failed and leaking oil |2.3.3| | 1 |
| Front suspension assembly component missing |2.3.1| | 1 |
| Stop lamp emits other than a steady red light |1.3.1b| | 1 |
| Offside Indicator tell tale not functioning |1.5.2| | 1 |
| Stop lamp remains on when the brakes are released | 1 |
| Rear Braking system does not have an approriate system/s fitted according to its age |3.1.1| | 1 |
| Throttle has a significant change in engine speed whilst moving the steering from lock to lock |2.1.4| | 1 |
| Front Brake caliper leaking (1.1.16 (b) (i)) | 1 |
| Drive belt sprocket carrier worn to excess |6.2.1e| | 1 |
| Front Stop lamp remains on when the brake is released |1.3.1e| | 1 |
| Offside Handlebar handgrip not secure to handlebars. |2.1.1c| | 1 |
| Brake component is fractured |3.1.5| | 1 |
| Front wheel spindle securing nut locking device missing |2.3.5a| | 1 |
| Horn sound not in accordance with requirements |7.7 |c|| | 1 |
| Front Brake disc|s| friction surface contaminated by oil or grease |3.2.A1k| | 1 |
| Rear suspension movement is excessively stiff |2.4.A.3b| | 1 |
| Floor brake test The less effective brake control does not achieve an efficiency of 25%. |3.3.C1b| | 1 |
| Rear Roller brake test indicates a sticking brake |3.3.A1a| | 1 |
| Front Brake caliper|s| insecure |3.2.A1j| | 1 |
| Front Brake caliper|s| securing bolt|s| loose |3.2.A1j| | 1 |
| Horn sounds harsh or grating |1.7.3c| | 1 |
| Headlamp not working on dipped beam |4.1.1 |a| |ii|| | 1 |
| Brake pedal insecure |3.1.2a| | 1 |
| Rear Roller brake test indicates a binding brake |3.3.A1a| | 1 |
| Rear position lamp damaged and function impaired |1.1.1b| | 1 |
| Rear Locking device|s| not correctly fitted which may make the motor bicycle dangerous to ride |6.2.1h| | 1 |
| Rear Rear suspension has corrosion which reduces the strength of a load bearing member or its supporting structure. |2.4.A.2d| | 1 |
| Offside Front Direction indicator insecure |1.5.3b| | 1 |
| Front Steering movement excessively `notchy` with the weight on the lower bearing |2.2.1a| | 1 |
| Front Steering movement excessively `notchy` with the wheel raised |2.2.1b| | 1 |
| Horn emits 2 or more alternating tones |1.7.3b| | 1 |
| Offside Direction indicators not working |1.5.1c| | 1 |
| Offside Front Upper Brake cylinder leaking hydraulic fluid |3.2.B1e| | 1 |
| Horn is not a constant note |1.7.3c| | 1 |
| Drive chain sprocket carrier worn to excess |6.2.1e| | 1 |
| Nearside Rear suspension has corrosion which reduces the strength of a load bearing member or its supporting structure. |2.4.A.2d| | 1 |
| Offside Rear suspension has corrosion which reduces the strength of a load bearing member or its supporting structure. |2.4.A.2d| | 1 |
| Offside Footrest insecure |6.2.1a| | 1 |
| Nearside Rear Motorcycle structure joining/attachment plate or fastening so insecure that structural rigidity is seriously reduced locking nut |6.1.1 |b| |ii|| | 1 |
| Rear reflector missing |4.8.2 |a| |ii|| | 1 |
| Nearside Rear Direction indicator not working |1.5.1c| | 1 |
| Fuel system component insecure |7.2.1b| | 1 |
| Front Brake fluid reservoir leaking hydraulic fluid |3.2.B1e| | 1 |
| Front Headlamp at least one does not illuminate on dipped beam |1.2.2a|i|| | 1 |
| Front Headlamp at least one does not illuminate on main beam |1.2.2a|ii|| | 1 |
| Front Roller brake test indicates brake effort rise disproportional to brake lever or pedal effort |3.3.A1c| | 1 |
| Rear Position lamp not working |4.2.1 |a|| | 1 |
| Throttle operating incorrectly sticking |6.2.7 |a| |i|| | 1 |
| Offside Handlebar grip insecure to handlebar |2.2.1 |d| |ii|| | 1 |
| Front Brake lever so insecure that the brake cannot be readily applied can not be applied smoothly |1.1.2 |e| |ii|| | 1 |
| Front Wheel bearing rough when rotated |5.1.3 |b| |i|| | 1 |
| Offside Rear shock absorber insecurely mounted |2.4.A.3b| | 1 |
| Nearside Rear suspension bush has excessive free play |2.4.A2a|i|| | 1 |
| Exhaust noise is clearly in excess of that emitted by a similar motor bicycle fitted with a standard silencer in average condition |7.1.2| | 1 |
| Headlamp aim beam image kick up to the offside |1.6| | 1 |
| Offside Rear Brake reaction bracket securing bolt|s| missing |3.2.A1j| | 1 |
| Fuel system component leaking |7.2.1a| | 1 |
| Nearside Direction indicators flashing less than 60 times a minute |1.5.1c| | 1 |
| Front Brake master cylinder fluid level dangerously low |3.2.B1d| | 1 |
| Front position lamp deteriorated and function impaired |1.1.1b| | 1 |
| Front Direction indicators not working |1.5.1c| | 1 |
| Rear Rear wheel bearings have excessive free play |2.4.A.2c| | 1 |
| Handlebar deformed |2.1.1b| | 1 |
| Offside Handlebar handgrip not secure to handlebars. switch gear |2.1.1c| | 1 |
| Steering movement excessively stiff with the weight on the lower bearing |2.2.1a| | 1 |
| Steering movement excessively stiff with the wheel raised |2.2.1b| | 1 |
| Steering movement excessively rough with the wheel raised |2.2.1b| | 1 |
| Steering movement excessively rough with the weight on the lower bearing |2.2.1a| | 1 |
| Nearside Rear Direction indicators not working |1.5.1c| | 1 |
| Front suspension assembly component loose |2.3.1| | 1 |
| Rear position lamp insecure |1.1.1c| | 1 |
| Offside Rear Direction indicator not working |1.5.1c| | 1 |
| Nearside Front Direction indicator not working |1.5.1c| | 1 |
| Front wheel has a loose wheel nut|s| |4.2.3a| | 1 |
| Front wheel spindle securing nut|s| loose |2.3.3a| | 1 |
| Front wheel spindle securing nut locking device missing |2.3.3a| | 1 |
| Offside Front Brake caliper|s| securing bolt|s| loose |3.2.A1j| | 1 |
| Nearside Front Brake caliper|s| securing bolt|s| loose |3.2.A1j| | 1 |
| Brake performance not tested |3.3| | 1 |
| Headlamp aim not tested |1.6| | 1 |
| Front Floor brake test indicates a binding brake |3.3.C2c| | 1 |
| Rear Brake component has restricted free movement and operation is likely to be impeded |3.2.A1h| | 1 |
| Riders seat insecure |6.2.1a| | 1 |
| Locking devices not correctly fitted which may make the motor bicycle dangerous to ride |6.2.1h| | 1 |
| Rear suspension has severe distortion of a load bearing member or its supporting structure. |2.4.A.2d| | 1 |
| Exhaust has part of the system missing |7.1.1a| | 1 |
| Front Brake master cylinder has a seized master cylinder pivot. |3.2.B5| | 1 |
| Rear Drive chain sprocket worn to excess |6.2.1e| | 1 |
| Nearside Front Direction indicator insecure |1.5.3b| | 1 |
| Nearside Front Direction indicator affected by the operation of another lamp |1.5.1c| | 1 |
| Nearside Rear Direction indicator affected by the operation of another lamp |1.5.1c| | 1 |
| Front Wheel alignment incorrect which adversely affects the handling |2.5.1| | 1 |
| Drive chain fouling another component |6.2.1d| | 1 |
| Locking devices not correctly fitted which may make the motor bicycle dangerous to ride Split pin - rear axle nut |6.2.1h| | 1 |
| Rear wheel spindle loose |2.4.A.2b| | 1 |
| Front Brake lever has inadequate reserve travel |3.1.3b| | 1 |
| Plate brake test No brake control achieves an efficiency of 30%. |3.3.B2a| | 1 |
| Rear Rear shock absorber has inadequate damping effect. |2.4.A.3b| | 1 |
| Offside Rear shock absorber seal failed and leaking oil |2.4.A.1c| | 1 |
| Exhaust is leaking and excessively noisey |7.1.1b| | 1 |
| Front Brake locking device missing |3.2.A1e| | 1 |
| Rear Brake reaction bracket insecure |3.2.A1j| | 1 |
| Front Front position lamp insecure |1.1.1c| | 1 |
| Offside Front Handlebar handgrip not secure to handlebars. |2.1.1c| | 1 |
| Front Front position lamp does not illuminate immediately when switched on |1.1.3a| | 1 |
| Front Brake hose is likely to be fouled or trapped by moving parts |3.2.B2c| | 1 |
| Fuel pipe leaking |7.2.1a| | 1 |
| Offside Rear Direction indicators not working |1.5.1c| | 1 |
| Front Floor brake test indicates a sticking brake |3.3.C2c| | 1 |
| Rear Rear wheel spindle securing nut locking device missing |2.4.A.2b| | 1 |
| Rear position lamp adversely affected by the operation of another lamp |1.1.3b| | 1 |
| Nearside Front wheel bearings have excessive free play |2.3.5b| | 1 |
| Offside Front wheel bearings have excessive free play |2.3.5b| | 1 |
| Front Steering headbearing has excessive free play |2.2.2| | 1 |
| Nearside Front Footrest insecure |6.2.1a| | 1 |
| Front Locking devices not correctly fitted which may make the motor bicycle dangerous to ride |6.2.1h| | 1 |
| Nearside Fuel system component leaking |7.2.1a| | 1 |
| Rear Stop lamp remains on when the brake is released |1.3.1e| | 1 |
| Rear Rear reflector on motorcycle missing |1.4.1| | 1 |
| Nearside Rear Exhaust is leaking and excessively noisey |7.1.1b| | 1 |