| Most common failures | No# failures |
|---|
| Headlamp aim out of alignment | 20 |
| Rear reflector on motorcycle missing |1.4.1| | 18 |
| Horn not working |1.7.3a| | 16 |
| Horn not loud enough to be heard by another road user |1.7.3a| | 13 |
| Nearside Front shock absorber seal failed and leaking oil |2.3.3| | 8 |
| Offside Front shock absorber seal failed and leaking oil |2.3.3| | 8 |
| Direction indicators affected by the operation of another lamp |1.5.1c| | 8 |
| Stop lamp affected by the operation of another lamp |1.3.2| | 7 |
| Front position lamp does not illuminate immediately when switched on |1.1.3a| | 7 |
| Drive chain worn to excess |6.2.1e| | 7 |
| Steering movement excessively `notchy` with the wheel raised |2.2.1b| | 6 |
| Steering movement excessively `notchy` with the weight on the lower bearing |2.2.1a| | 6 |
| Headlamp at least one does not illuminate on dipped beam |1.2.2a|i|| | 5 |
| Rear Wheel spoke excessively loose |4.2.1b| | 5 |
| Roller brake test The less effective brake control does not achieve an efficiency of 25%. |3.3.A2b| | 4 |
| Rear Rear reflector on motorcycle missing |1.4.1| | 4 |
| Drive chain excessively loose |6.2.1d| | 4 |
| Rear Drive chain sprocket worn to excess |6.2.1e| | 4 |
| Locking device|s| not correctly fitted which may make the motor bicycle dangerous to ride |6.2.1h| | 4 |
| Front Horn not working |1.7.3a| | 4 |
| Drive chain sprocket carrier worn to excess |6.2.1e| | 4 |
| Registration plate issues | 4 |
| Front Brake lever has inadequate reserve travel |3.1.3b| | 4 |
| Front Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 4 |
| Headlamp at least one does not illuminate on main beam |1.2.2a|ii|| | 3 |
| Rear Brake pedal has inadequate reserve travel |3.1.3b| | 3 |
| Rear Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 3 |
| Handlebar deformed |2.1.1b| | 3 |
| Nearside Rear Direction indicators not working |1.5.1c| | 3 |
| Brake lever has inadequate reserve travel |3.1.3b| | 3 |
| Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 3 |
| Nearside Handlebar handgrip not secure to handlebars. |2.1.1c| | 3 |
| Front Steering headbearing has excessive free play |2.2.2| | 3 |
| Direction indicators flashing more than 120 times per minute |1.5.1c| | 3 |
| Rear Direction indicators not working |1.5.1c| | 3 |
| Rear shock absorber has inadequate damping effect. |2.4.A.3b| | 3 |
| Direction indicators not working |1.5.1c| | 3 |
| Steering headbearing has excessive free play |2.2.2| | 3 |
| Front Direction indicators affected by the operation of another lamp |1.5.1c| | 3 |
| Rear Direction indicators affected by the operation of another lamp |1.5.1c| | 3 |
| Wheel alignment incorrect which adversely affects the handling |2.5.1| | 3 |
| Rear Direction indicator missing |1.5.1a| | 2 |
| Drive chain horseshoe locking device incorrectly fitted (6.1.7 (j) (i)) | 2 |
| Fuel cap mounting flange/sealing method defective |7.2.2c| | 2 |
| Drive chain excessively tight |6.2.1d| | 2 |
| Offside Direction indicator affected by the operation of another lamp |1.5.1c| | 2 |
| Rear suspension bush has excessive free play |2.4.A2a|i|| | 2 |
| Brake pedal is so short and the brake cannot be readily applied |3.1.3c| | 2 |
| Front Headlamp at least one does not illuminate on dipped beam |1.2.2a|i|| | 2 |
| Brake performance not tested |3.3| | 2 |
| Front wheel spindle securing nut locking device missing |2.3.5a| | 2 |
| Steering movement excessively stiff with the weight on the lower bearing |2.2.1a| | 2 |
| Rear Locking device|s| not correctly fitted which may make the motor bicycle dangerous to ride |6.2.1h| | 2 |
| Rear Stop lamp affected by the operation of another lamp |1.3.2| | 2 |
| Front Horn not loud enough to be heard by another road user |1.7.3a| | 2 |
| Riders seat insecure |6.2.1a| | 2 |
| Front Direction indicators not working |1.5.1c| | 2 |
| Front Front position lamp damaged and function impaired |1.1.1b| | 2 |
| Headlamp dipped beam affected by the operation of the horn |1.2.2c| | 2 |
| Rear reflector missing (4.8.2 (a) (ii)) | 2 |
| Direction indicator affected by the operation of another lamp |1.5.1c| | 2 |
| Front Brake locking device insecure |3.2.A1e| | 2 |
| Front Roller brake test indicates a sticking brake |3.3.A1a| | 2 |
| Rear position lamp does not illuminate immediately when it is switched on |1.1.3a| | 2 |
| Headlamp insecure |1.2.3b| | 2 |
| Direction indicators flashing less than 60 times a minute |1.5.1c| | 2 |
| Nearside Rear Direction indicator insecure |1.5.3b| | 2 |
| Rear wheel bearings have excessive free play |2.4.A.2c| | 2 |
| Front Direction indicator not working |1.5.1c| | 1 |
| Rear Direction indicator not working |1.5.1c| | 1 |
| Fuel cap does not fasten securely by a positive means |7.2.2b| | 1 |
| Front Direction indicator missing |1.5.1a| | 1 |
| Rear Roller brake test indicates a sticking brake |3.3.A1a| | 1 |
| Exhaust is leaking and excessively noisey |7.1.1b| | 1 |
| Fuel pipe leaking |7.2.1a| | 1 |
| Exhaust silencer insecure (8.1.1 (b) (i)) | 1 |
| Stop lamp deteriorated and function impaired |1.3.3a| | 1 |
| Horn is not a constant note |1.7.3c| | 1 |
| Front Brake lever attachment screws loose |3.1.2b| | 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 |
| Front Floor brake test indicates a binding brake |3.3.C2c| | 1 |
| Floor brake test The less effective brake control does not achieve an efficiency of 25%. |3.3.C1b| | 1 |
| Front wheel spindle securing nut locking device missing |2.3.3a| | 1 |
| Front Steering control handlebar movement restricted by taut cables |2.1.2c| | 1 |
| Stop lamp switch with a delay in operation not working |4.3.2 |a| |ii|| | 1 |
| Wheel alignment incorrect which adversely affects the handling out to offside |2.4 |a|| | 1 |
| Headlamp aim not tested lights & exhaust not tested due to vehicle not starting |1.6| | 1 |
| Rear Rear wheel bearings have excessive free play |2.4.A.2c| | 1 |
| Rear Brake lining|s| less than 1.5 mm thick |3.2.A1f|i|| | 1 |
| Stop lamp not working |4.3.1 |a| |ii|| | 1 |
| Nearside Direction indicator affected by the operation of another lamp |1.5.1c| | 1 |
| Rear Locking device|s| not correctly fitted which may make the motor bicycle dangerous to ride wheel nut split pin missing |6.2.1h| | 1 |
| Direction indicator flashing more than 120 times per minute |1.5.1c| | 1 |
| Nearside Direction indicator not working |1.5.1c| | 1 |
| Stop lamp affected by the operation of the horn |1.3.2| | 1 |
| Rear suspension component loose |2.4.A.1a| | 1 |
| Rear Rear wheel spindle securing nut locking device missing |2.4.A.2b| | 1 |
| Nearside Front Front shock absorber seal failed and leaking oil |2.3.3| | 1 |
| Stop lamp does not illuminate immediately a brake applies front brake |1.3.1a| | 1 |
| Stop lamp missing |1.3.3a| | 1 |
| Rear Drive chain excessively tight |6.2.1d| | 1 |
| Front Front wheel spindle securing nut locking device missing |2.3.3a| | 1 |
| Offside Direction indicator not working |1.5.1c| | 1 |
| Offside Rear Lower Locking devices not correctly fitted which may make the motor bicycle dangerous to ride no split pins in spindle or torque arm |6.2.1h| | 1 |
| Centre Rear Upper Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 1 |
| Centre Front Upper Headlamp main beam affected by the operation of another lamp much brighter on one beam |1.2.2c| | 1 |
| Horn missing |1.7.1| | 1 |
| Exhaust mounting missing |7.1.1c| | 1 |
| Brake pedal insecure |3.1.2a| | 1 |
| Rear Locking devices not correctly fitted which may make the motor bicycle dangerous to ride |6.2.1h| | 1 |
| Rear suspension movement is excessively stiff |2.4.A.3b| | 1 |
| Rear Stop lamp deteriorated and function impaired |1.3.3a| | 1 |
| Front Fuel system component insecure |7.2.1b| | 1 |
| Rear Rear position lamp damaged and function impaired |1.1.1b| | 1 |
| Rear Wheel alignment incorrect which adversely affects the handling |2.5.1| | 1 |
| Front Direction indicators flashing more than 120 times per minute |1.5.1c| | 1 |
| Rear Direction indicators flashing more than 120 times per minute |1.5.1c| | 1 |
| Nearside Front Position lamp switch insecure |1.1.4b| | 1 |
| Headlamp main beam affected by the operation of the horn |1.2.2c| | 1 |
| Centre Direction indicator affected by the operation of another lamp |1.5.1c| | 1 |
| Stop lamp not working front stop lamp switch missing (4.3.1 (a) (ii)) | 1 |
| Fuel pipe insecure fuel pipe clips missing (6.1.3 (a) (i)) | 1 |
| Roller brake test The less effective brake control does not achieve an efficiency of 25% (1.2.2 (a) (i)) | 1 |
| Offside Front Direction indicators flashing less than 60 times a minute |1.5.1c| | 1 |
| Offside Steering lock stop ineffective |2.1.3| | 1 |
| Nearside Rear Footrest insecure |6.2.1a| | 1 |
| Front Built up wheel has a missing rivet/s |4.2.1c| | 1 |
| Horn control not readily accesible. |1.7.2a| | 1 |
| Rear wheel insecure |4.2.3b| | 1 |
| Steering control handlebar movement restricted by taut cables |2.1.2c| | 1 |
| Locking devices not correctly fitted which may make the motor bicycle dangerous to ride |6.2.1h| | 1 |
| Horn is not continous or uniform |1.7.3c| | 1 |
| Rear Brake locking device missing |3.2.A1e| | 1 |
| Front Front position lamp adversely affected by the operation of another lamp |1.1.3b| | 1 |
| Upper Fuel cap missing |7.2.2a| | 1 |
| Direction indicator deteriorated and function impaired |1.5.3a| | 1 |
| Brake locking device missing |3.2.A1e| | 1 |
| Horn emits 2 or more alternating tones |1.7.3b| | 1 |
| Rear suspension bearing excessively deteriorated |2.4A.2a|i|| | 1 |
| Front Footrest insecure |6.2.1a| | 1 |
| Stop lamp damaged and function impaired |1.3.3a| | 1 |
| Rear wheel spindle securing nut|s| loose |2.4.A.2b| | 1 |
| Front Direction indicator flashing less than 60 times a minute |1.5.1c| | 1 |
| Rear Direction indicator flashing less than 60 times a minute |1.5.1c| | 1 |
| Brake lever is bent and the brake cannot be readily applied |3.1.3c| | 1 |
| Front Handlebar handgrip not secure to handlebars. |2.1.1c| | 1 |
| Rear Brake pedal is damaged and the brake cannot be readily applied |3.1.3c| | 1 |
| Brake component is fractured |3.1.5| | 1 |
| Front shock absorber seal failed and leaking oil |2.3.3| | 1 |
| Brake cable knotted |3.2.A1b| | 1 |
| Nearside Front Direction indicator not working |1.5.1c| | 1 |
| Front position lamp deteriorated and function impaired |1.1.1b| | 1 |
| All position lamps adversely affected by the operation of another lamp |1.1.3b| | 1 |
| Headlamp aim beam image too far to the left |1.6.4| | 1 |
| Front Front wheel bearings are excessively rough |2.3.5b| | 1 |
| Front Exhaust mounting missing |7.1.1c| | 1 |
| Rear Brake rod excessively damaged |3.2.A1c| | 1 |
| Rear Rear suspension bush has excessive free play |2.4.A2a|i|| | 1 |
| Rear Rear wheel rotation likely to be impeded |6.2.1b| | 1 |
| Headlamp aim headlamp damaged and function impaired |1.2.3a| | 1 |
| Front Brake cable guide defective and affecting operation Nipple broke when applying brake (1.1.15 (d)) | 1 |
| Front Wheel excessively distorted (5.2.2 (c) (i)) | 1 |
| Rear Wheel excessively damaged (5.2.2 (c) (i)) | 1 |
| Horn sound not in accordance with requirements (7.7 (c)) | 1 |
| Front Brake performance not tested (1.2.1 (g)) | 1 |
| Front Locking devices not correctly fitted which may make the motor bicycle dangerous to ride |6.2.1h| | 1 |
| Front wheel spindle securing nut locking device insecure |2.3.5a| | 1 |
| Rear Brake pedal is bent and the brake cannot be readily applied |3.1.3c| | 1 |
| Rear Roller brake test indicates a binding brake |3.3.A1a| | 1 |
| Rear Stop lamp remains on when the brake is released |1.3.1e| | 1 |
| Brake lever cannot be applied smoothly |3.1.3d| | 1 |
| Offside Rear Direction indicators not working |1.5.1c| | 1 |
| Front Brake cable badly frayed |3.2.A1b| | 1 |
| Brake pedal cannot be released smoothly |3.1.3d| | 1 |
| Stop lamp remains on when the brake is released |1.3.1e| | 1 |
| Rear position lamp adversely affected by the operation of another lamp |1.1.3b| | 1 |
| Nearside Front Direction indicator insecure |1.5.3b| | 1 |
| Floor brake test No brake control achieves an efficiency of 30%. |3.3.C1a| | 1 |
| Floor brake test Neither brake control achieves an efficiency of 25% |3.3.C1b| | 1 |
| Front Brake lever insecure |3.1.2a| | 1 |
| Offside Front Footrest missing |6.2.1a| | 1 |
| Brake lever mounting cracked |3.1.2c| | 1 |
| Front Horn not working |7.7 |a| |ii|| | 1 |
| Front All direction indicators not working |4.4.1 |a| |ii|| | 1 |
| Rear All direction indicators not working |4.4.1 |a| |ii|| | 1 |
| Front Stop lamp not working |4.3.1 |a| |ii|| | 1 |
| Rear Stop lamp not working |4.3.1 |a| |ii|| | 1 |
| Rear Shock absorber has negligible damping effect |5.3.2 |b|| | 1 |
| Nearside Drive chain excessively loose |6.1.7 |c| |i|| | 1 |
| Fuel pipe union leaking |7.2.1a| | 1 |
| Chain guard insecure |6.2.1c| | 1 |
| Nearside Rear Direction indicator damaged and function impaired |1.5.3a| | 1 |
| Offside Front Direction indicator damaged and function impaired |1.5.3a| | 1 |
| Nearside Front Direction indicators affected by the operation of another lamp |1.5.1c| | 1 |
| Front Steering movement excessively stiff with the wheel raised |2.2.1b| | 1 |
| Upper Fuel cap mounting flange/sealing method defective |7.2.2c| | 1 |
| Nearside Front Direction indicators not working |1.5.1c| | 1 |
| Front wheel bearings have excessive free play |2.3.5b| | 1 |
| Front Brake lever mounting insecure |3.1.2a| | 1 |
| Clutch lever positioned so it cannot be readily operated. |6.2.1g| | 1 |
| Direction indicator not working |1.5.1c| | 1 |
| Front Stop lamp remains on when the brake is released |1.3.1e| | 1 |
| Brake locking device insecure |3.2.A1e| | 1 |
| Front Front suspension has a modification which reduces the strength of a load bearing member or its supporting structure. |2.3.8| | 1 |
| Front Stop lamp missing |1.3.3a| | 1 |
| Front Front position lamp does not illuminate immediately when switched on |1.1.3a| | 1 |
| Front Wheel spoke excessively loose |4.2.1b| | 1 |
| Rear Rear shock absorber has inadequate damping effect. |2.4.A.3b| | 1 |
| Front Brake lining|s| less than 1.5 mm thick |3.2.A1f|i|| | 1 |
| Rear Brake back plate|s| securing bolt|s| missing |3.2.A1j| | 1 |
| Front Brake lever cannot be released smoothly |3.1.3d| | 1 |
| Rear Rear suspension bearing has excessive free play |2.4.A2a|i|| | 1 |
| Front position lamp insecure |1.1.1c| | 1 |
| Rear wheel spindle securing nut locking device missing |2.4.A.2b| | 1 |
| Nearside Rear Direction indicator not working |1.5.1c| | 1 |
| Rear Rear reflector missing |4.8.2 |a| |ii|| | 1 |
| Horn not working (7.7 (a)) | 1 |
| Nearside Front Direction indicator not working (4.4.1 (a) (ii)) | 1 |
| Direction indicators affected by the operation of another lamp when lights are on |1.5.1c| | 1 |
| Offside Front Upper Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 1 |
| Front Wheel bearing has excessive play (5.1.3 (a) (i)) | 1 |
| Front Horn not working (7.7 (a)) | 1 |
| All direction indicators not working (4.4.1 (a) (ii)) | 1 |
| Rear Stop lamp adversely affected by the operation of another lamp (4.3.3 (b)) | 1 |
| Front Stop lamp not working (4.3.1 (a) (ii)) | 1 |
| Rear reflector missing |4.8.2 |a| |ii|| | 1 |
| Horn not working |7.7 |a| |ii|| | 1 |
| Front Upper Front shock absorber seal failed and leaking oil |2.3.3| | 1 |
| Front Upper Horn not working |1.7.3a| | 1 |
| Front Upper Handlebar deformed |2.1.1b| | 1 |
| Front Brake component has restricted free movement and operation is likely to be impeded |3.2.A1h| | 1 |
| Front Front shock absorber seal failed and leaking oil |2.3.3| | 1 |
| Offside Direction indicators affected by the operation of another lamp |1.5.1c| | 1 |
| Rear suspension bearing has excessive free play |2.4.A2a|i|| | 1 |
| Position lamp switch faulty |1.1.4a| | 1 |
| Headlamp switch faulty |1.2.4| | 1 |