| Most common failures | No# failures |
|---|
| Headlamp aim out of alignment | 19 |
| Horn not working |1.7.3a| | 17 |
| Rear reflector on motorcycle missing |1.4.1| | 16 |
| Horn not loud enough to be heard by another road user |1.7.3a| | 10 |
| Headlamp at least one does not illuminate on dipped beam |1.2.2a|i|| | 10 |
| Rear Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 8 |
| Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 8 |
| Direction indicators not working |1.5.1c| | 6 |
| Direction indicators affected by the operation of another lamp |1.5.1c| | 6 |
| Front Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 6 |
| Rear Drive chain sprocket worn to excess |6.2.1e| | 5 |
| Steering headbearing has excessive free play |2.2.2| | 5 |
| Rear Rear reflector on motorcycle missing |1.4.1| | 4 |
| Nearside Front shock absorber seal failed and leaking oil |2.3.3| | 4 |
| Steering movement excessively `notchy` with the weight on the lower bearing |2.2.1a| | 4 |
| Direction indicator flashing less than 60 times a minute |1.5.1c| | 4 |
| Front suspension has inadequate damping effect. |2.3.6c| | 4 |
| Direction indicators flashing less than 60 times a minute |1.5.1c| | 4 |
| Registration plate issues | 3 |
| Rear Stop lamp affected by the operation of another lamp |1.3.2| | 3 |
| Direction indicator not working |1.5.1c| | 3 |
| Offside Front shock absorber seal failed and leaking oil |2.3.3| | 3 |
| Nearside Rear Direction indicators not working |1.5.1c| | 3 |
| Rear wheel spindle securing nut locking device missing |2.4.A.2b| | 3 |
| Drive chain worn to excess |6.2.1e| | 3 |
| Front Roller brake test indicates a binding brake |3.3.A1a| | 3 |
| Front Direction indicator not working |1.5.1c| | 3 |
| Rear Direction indicator not working |1.5.1c| | 3 |
| Direction indicator affected by the operation of another lamp |1.5.1c| | 3 |
| Stop lamp affected by the operation of the horn |1.3.2| | 3 |
| Offside Rear Direction indicators not working |1.5.1c| | 3 |
| Front Brake lever has inadequate reserve travel |3.1.3b| | 3 |
| Rear position lamp does not illuminate immediately when it is switched on |1.1.3a| | 3 |
| Front position lamp does not illuminate immediately when switched on |1.1.3a| | 3 |
| Drive chain excessively loose |6.2.1d| | 3 |
| Stop lamp affected by the operation of another lamp |1.3.2| | 3 |
| Drive chain excessively tight |6.2.1d| | 3 |
| Front Headlamp aim headlamp deteriorated and function impaired |1.2.3a| | 2 |
| Front mudguard insecure |2.3.7| | 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 |
| Rear Locking devices not correctly fitted which may make the motor bicycle dangerous to ride |6.2.1h| | 2 |
| Front shock absorber seal failed and leaking oil |2.3.3| | 2 |
| Rear reflector missing |4.8.2 |a| |ii|| | 2 |
| Rear Brake pedal has inadequate reserve travel |3.1.3b| | 2 |
| Nearside Direction indicator not working |1.5.1c| | 2 |
| Offside Direction indicator not working |1.5.1c| | 2 |
| Nearside Handlebar handgrip not secure to handlebars. |2.1.1c| | 2 |
| Offside Front Direction indicators not working |1.5.1c| | 2 |
| Rear position lamp adversely affected by the operation of the horn |1.1.3b| | 2 |
| Horn is not continous or uniform |1.7.3c| | 2 |
| Nearside Rear Direction indicator not working |1.5.1c| | 2 |
| Headlamp at least one does not illuminate on main beam |1.2.2a|ii|| | 2 |
| Headlamp main beam affected by the operation of the horn |1.2.2c| | 2 |
| Rear Direction indicators flashing less than 60 times a minute |1.5.1c| | 2 |
| Roller brake test The less effective brake control does not achieve an efficiency of 25%. |3.3.A2b| | 2 |
| Front Brake lever cannot be released smoothly |3.1.3d| | 2 |
| Front Headlamp at least one does not illuminate on dipped beam |1.2.2a|i|| | 2 |
| Front Brake lever is so short and the brake cannot be readily applied |3.1.3c| | 1 |
| Horn is not a constant note |1.7.3c| | 1 |
| Offside Front Front shock absorber seal failed and leaking oil |2.3.3| | 1 |
| Rear Brake component has restricted free movement and operation is likely to be impeded |3.2.A1h| | 1 |
| All direction indicators not working (4.4.1 (a) (ii)) | 1 |
| Stop lamp adversely affected by the operation of another lamp (4.3.3 (b)) | 1 |
| Throttle operating incorrectly (6.2.7 (a) (i)) | 1 |
| Steering headbearing excessively stiff or notchy (2.2.2 (f) (i)) | 1 |
| Headlamp main beam affected by the operation of another lamp |1.2.2c| | 1 |
| Front Front position lamp does not illuminate immediately when switched on |1.1.3a| | 1 |
| Rear Drive chain sprocket carrier worn to excess |6.2.1e| | 1 |
| Clutch lever shortened so it cannot be readily operated. |6.2.1g| | 1 |
| Rear wheel rotation likely to be impeded |6.2.1b| | 1 |
| Exhaust is leaking and excessively noisey |7.1.1b| | 1 |
| Front Brake pedal cannot be released smoothly |3.1.3d| | 1 |
| Front wheel spindle securing nut locking device missing |2.3.5a| | 1 |
| Front position lamp adversely affected by the operation of another lamp |1.1.3b| | 1 |
| Rear position lamp adversely affected by the operation of another lamp |1.1.3b| | 1 |
| Front Direction indicators affected by the operation of another lamp |1.5.1c| | 1 |
| Horn not working |7.7 |a| |ii|| | 1 |
| Exhaust has a major leak of exhaust gases |6.1.2 |a|| | 1 |
| Direction indicators flashing more than 120 times per minute |1.5.1c| | 1 |
| Headlamp aim headlamp deteriorated and function impaired |1.2.3a| | 1 |
| Front Brake lever insecure |3.1.2a| | 1 |
| Motorcycle structure excessively corroded |6.1.1a| | 1 |
| Rear wheel bearings have excessive free play |2.4.A.2c| | 1 |
| Headlamp damaged and function impaired |1.2.3a| | 1 |
| Offside Upper Front suspension assembly component loose |2.3.1| | 1 |
| Nearside Rear shock absorber seal failed and leaking oil |2.4.A.1c| | 1 |
| Steering movement excessively rough with the weight on the lower bearing |2.2.1a| | 1 |
| Rear Wheel bearing has excessive play (5.1.3 (a) (i)) | 1 |
| Offside Front Shock absorber has a serious fluid leak (5.3.2 (b)) | 1 |
| Rear Brake component insecure (1.1.21 (c)) | 1 |
| Nearside All direction indicators not working (4.4.1 (a) (ii)) | 1 |
| Offside All direction indicators not working (4.4.1 (a) (ii)) | 1 |
| All direction indicators adversely affected by the operation of another lamp |4.4.3 |b|| | 1 |
| Rear Brake rod insecure (1.1.15 (c)) | 1 |
| Wheel alignment incorrect which adversely affects the handling (2.4 (a)) | 1 |
| Rear Brake locking device missing |3.2.A1e| | 1 |
| Front All position lamps do not illuminate immediately when switched on |1.1.3a| | 1 |
| Fuel system component insecure |7.2.1b| | 1 |
| Offside Direction indicators flashing more than 120 times per minute |1.5.1c| | 1 |
| Rear Front position lamp does not illuminate immediately when switched on |1.1.3a| | 1 |
| Nearside Rear Direction indicator damaged and function impaired |1.5.3a| | 1 |
| Offside Front Front wheel spindle securing nut locking device missing |2.3.5a| | 1 |
| Rear Footrest missing |6.2.1a| | 1 |
| Rear Rear suspension bush has excessive free play |2.4.A2a|i|| | 1 |
| Rear shock absorber has inadequate damping effect. |2.4.A.3b| | 1 |
| Offside Rear Direction indicator missing |1.5.1a| | 1 |
| Nearside Rear Drive chain worn to excess |6.2.1e| | 1 |
| Nearside Front Direction indicator flashing less than 60 times a minute |1.5.1c| | 1 |
| Nearside Rear Direction indicator flashing less than 60 times a minute |1.5.1c| | 1 |
| Nearside Front Front shock absorber seal failed and leaking oil |2.3.3| | 1 |
| Rear Rear wheel spindle securing nut locking device missing |2.4.A.2b| | 1 |
| Front Footrest insecure |6.2.1a| | 1 |
| Direction indicator deteriorated and function impaired |1.5.3a| | 1 |
| Wheel alignment incorrect which adversely affects the steering |2.5.1| | 1 |
| Nearside Locking device|s| not correctly fitted which may make the motor bicycle dangerous to ride |6.2.1h| | 1 |
| Nearside Footrest insecure |6.2.1a| | 1 |
| Horn not working (7.7 (a) (ii)) | 1 |
| Rear Wheel alignment incorrect which adversely affects the handling |2.5.1| | 1 |
| Nearside Front Direction indicators flashing less than 60 times a minute |1.5.1c| | 1 |
| Nearside Front Upper Front shock absorber seal failed and leaking oil |2.3.3| | 1 |
| Rear Front mudguard insecure |2.3.7| | 1 |
| Offside Front Brake lever is inoperative |3.1.3c| | 1 |
| Offside Front Brake performance not tested |3.3| | 1 |
| Nearside Horn not working |1.7.3a| | 1 |
| Front Brake locking device missing |3.2.A1e| | 1 |
| Front Brake lever cannot be applied smoothly |3.1.3d| | 1 |
| Locking devices not correctly fitted which may make the motor bicycle dangerous to ride |6.2.1h| | 1 |
| Floor brake test The less effective brake control does not achieve an efficiency of 25%. |3.3.C1b| | 1 |
| Rear Rear position lamp adversely affected by the operation of another lamp |1.1.3b| | 1 |
| Rear Direction indicator deteriorated and function impaired |1.5.3a| | 1 |
| Rear Rear reflector on motorcycle obscured |1.4.1| | 1 |
| Direction indicator flashing more than 120 times per minute |1.5.1c| | 1 |
| Front Roller brake test indicates a sticking brake |3.3.A1a| | 1 |
| Offside Rear Direction indicator insecure |1.5.3b| | 1 |
| Handlebar deformed |2.1.1b| | 1 |
| All position lamps adversely affected by the operation of another lamp |1.1.3b| | 1 |
| Drive chain horseshoe locking device incorrectly fitted |6.1.7 |j| |i|| | 1 |
| Drive chain fouling another component |6.2.1d| | 1 |
| Rear Brake reaction bracket securing bolt|s| missing |3.2.A1j| | 1 |
| Chain guard insecure |6.2.1c| | 1 |
| Direction indicator deteriorated and function impaired all |1.5.3a| | 1 |
| Roller brake test indicates a sticking brake |3.3.A1a| | 1 |
| Stop lamp remains on when the brake is released |1.3.1e| | 1 |
| Fuel cap does not fasten securely by a positive means |7.2.2b| | 1 |
| Dipswitch does not operate immediately when selected on main beam (4.1.3 (b)) | 1 |
| Rear Stop lamp adversely affected by the operation of another lamp FLASHES WITH INDICATORS |4.3.3 |b|| | 1 |
| Front Headlamp not working on dipped beam |4.1.1 |a| |ii|| | 1 |
| Front Headlamp not working on main beam |4.1.1 |a| |ii|| | 1 |
| Fuel cap ineffective |6.1.3 |b| |i|| | 1 |
| Front position lamp adversely affected by the operation of the horn |1.1.3b| | 1 |
| Horn sounds harsh or grating |1.7.3c| | 1 |
| Front Front suspension assembly component excessively misaligned |2.3.1| | 1 |
| Front Direction indicators flashing less than 60 times a minute |1.5.1c| | 1 |
| Front Brake lever is positioned so that the brake cannot be readily applied |3.1.3c| | 1 |
| Steering control handlebar movement restricted by trapped cables |2.1.2c| | 1 |
| Front Floor brake test indicates a sticking brake |3.3.C2c| | 1 |
| Plate brake test The less effective brake control does not achieve an efficiency of 25%. |3.3.B2b| | 1 |
| Horn not working (7.7 (a)) | 1 |
| Front Roller brake test indicates a severely grabbing brake |3.3.A1b| | 1 |
| Front wheel spindle securing nut locking device missing |2.3.3a| | 1 |
| Front Fork yoke deformed |2.1.1b| | 1 |
| Nearside Rear Position lamp not working |4.2.1 |a|| | 1 |
| Nearside Front Direction indicators not working |1.5.1c| | 1 |
| Front Steering movement excessively `notchy` with the weight on the lower bearing |2.2.1a| | 1 |
| Front Direction indicators not working |1.5.1c| | 1 |
| Rear Direction indicators not working |1.5.1c| | 1 |
| Front Horn not working |1.7.3a| | 1 |
| Rear Direction indicator missing |1.5.1a| | 1 |
| Front Brake locking device insecure |3.2.A1e| | 1 |
| Front Wheel spoke excessively loose |4.2.1b| | 1 |
| Riders seat insecure |6.2.1a| | 1 |
| Locking device|s| not correctly fitted which may make the motor bicycle dangerous to ride |6.2.1h| | 1 |
| Front Headlamp damaged and function impaired |1.2.3a| | 1 |
| Front Horn not loud enough to be heard by another road user |1.7.3a| | 1 |
| Front Front wheel spindle securing nut locking device missing |2.3.3a| | 1 |
| Rear Front wheel spindle securing nut locking device insecure |2.3.3a| | 1 |
| Front Brake reaction bracket insecure |3.2.A1j| | 1 |
| Front Headlamp incorrect colour |1.2.1| | 1 |
| Rear Wheel alignment incorrect which adversely affects the steering |2.5.1| | 1 |
| Front Floor brake test indicates a binding brake |3.3.C2c| | 1 |
| Offside Rear Direction indicator not working |1.5.1c| | 1 |
| Front Direction indicator affected by the operation of another lamp |1.5.1c| | 1 |
| Rear Direction indicator affected by the operation of another lamp |1.5.1c| | 1 |
| Offside Rear Brake back plate|s| securing bolt|s| missing |3.2.A1j| | 1 |
| Front Wheel has an excessively distorted bead rim. |4.2.2| | 1 |
| Nearside Front Direction indicator incorrect colour |1.5.1b| | 1 |
| Nearside Rear Direction indicator incorrect colour |1.5.1b| | 1 |
| Offside Front Direction indicator incorrect colour |1.5.1b| | 1 |
| Offside Rear Direction indicator incorrect colour |1.5.1b| | 1 |
| Nearside Rear Direction indicator affected by the operation of another lamp |1.5.1c| | 1 |
| Offside Rear Direction indicator affected by the operation of another lamp |1.5.1c| | 1 |
| Position lamp switch insecure |1.1.4b| | 1 |
| Front Front shock absorber seal failed and leaking oil |2.3.3| | 1 |
| Rear Roller brake test indicates a binding brake |3.3.A1a| | 1 |
| Brake locking device missing |3.2.A1e| | 1 |
| Headlamp dipped beam affected by the operation of another lamp |1.2.2c| | 1 |
| Front Steering headbearing has excessive free play |2.2.2| | 1 |