| Most common failures | No# failures |
|---|
| Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 16 |
| Headlamp aim out of alignment | 14 |
| Horn not working |1.7.3a| | 12 |
| Rear reflector on motorcycle missing |1.4.1| | 10 |
| Headlamp at least one does not illuminate on dipped beam |1.2.2a|i|| | 9 |
| Rear position lamp does not illuminate immediately when it is switched on |1.1.3a| | 8 |
| Horn not loud enough to be heard by another road user |1.7.3a| | 7 |
| Headlamp at least one does not illuminate on main beam |1.2.2a|ii|| | 7 |
| Rear Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 5 |
| Front position lamp does not illuminate immediately when switched on |1.1.3a| | 5 |
| Rear position lamp adversely affected by the operation of another lamp |1.1.3b| | 4 |
| Stop lamp affected by the operation of another lamp |1.3.2| | 4 |
| Rear wheel spindle securing nut locking device missing |2.4.A.2b| | 4 |
| Front Front wheel spindle securing nut locking device missing |2.3.3a| | 3 |
| Rear Rear position lamp does not illuminate immediately when it is switched on |1.1.3a| | 3 |
| Registration plate issues | 3 |
| Direction indicators flashing less than 60 times a minute |1.5.1c| | 3 |
| Front wheel bearings are excessively rough |2.3.5b| | 3 |
| Nearside Front shock absorber seal failed and leaking oil |2.3.3| | 3 |
| Rear Wheel spoke excessively loose |4.2.1b| | 2 |
| Headlamp main beam affected by the operation of another lamp |1.2.2c| | 2 |
| Centre Front Horn not loud enough to be heard by another road user |1.7.3a| | 2 |
| Front Front position lamp does not illuminate immediately when switched on |1.1.3a| | 2 |
| Headlamp insecure |1.2.3b| | 2 |
| Front Roller brake test indicates a sticking brake |3.3.A1a| | 2 |
| Rear Brake pedal has inadequate reserve travel |3.1.3b| | 2 |
| Offside Rear Direction indicator affected by the operation of another lamp |1.5.1c| | 2 |
| Nearside Rear Footrest insecure |6.2.1a| | 2 |
| All position lamps adversely affected by the operation of another lamp |1.1.3b| | 2 |
| Front Brake lever has inadequate reserve travel |3.1.3b| | 2 |
| Wheel alignment incorrect which adversely affects the handling |2.5.1| | 2 |
| All position lamps do not illuminate immediately when switched on |1.1.3a| | 2 |
| Drive chain excessively loose |6.2.1d| | 2 |
| Roller brake test The less effective brake control does not achieve an efficiency of 25%. |3.3.A2b| | 2 |
| Steering headbearing has excessive wear or free play (2.2.2 (f) (i)) | 2 |
| Nearside Direction indicator affected by the operation of another lamp |1.5.1c| | 1 |
| Headlamp aim not tested |1.6| | 1 |
| Locking device|s| not correctly fitted which may make the motor bicycle dangerous to ride |6.2.1h| | 1 |
| Inner Front Steering movement excessively `notchy` with the wheel raised |2.2.1b| | 1 |
| Front wheel spindle securing nut locking device missing |2.3.5a| | 1 |
| Direction indicators not working |1.5.1c| | 1 |
| Rear Rear wheel spindle securing nut locking device insecure |2.4.A.2b| | 1 |
| Rear Rear suspension bush has excessive free play |2.4.A2a|i|| | 1 |
| Horn sounds harsh or grating |1.7.3c| | 1 |
| Offside Front Upper Throttle has a significant change in engine speed whilst moving the steering from lock to lock |2.1.4| | 1 |
| Rear Rear wheel spindle securing nut locking device missing |2.4.A.2b| | 1 |
| Nearside Rear Direction indicator insecure |1.5.3b| | 1 |
| Front Floor brake test indicates a sticking brake |3.3.C2c| | 1 |
| Rear Footrest missing |6.2.1a| | 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 |
| Rear shock absorber seal failed and leaking oil |2.4.A.1c| | 1 |
| Centre Rear Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 1 |
| Centre Rear Rear position lamp does not illuminate immediately when it is switched on |1.1.3a| | 1 |
| Direction indicators flashing more than 120 times per minute |1.5.1c| | 1 |
| Rear Stop lamp affected by the operation of another lamp |1.3.2| | 1 |
| Headlamp dipped beam affected by the operation of another lamp |1.2.2c| | 1 |
| Position lamp switch faulty |1.1.4a| | 1 |
| Front Headlamp insecure |1.2.3b| | 1 |
| Front Wheel has an excessively distorted bead rim. |4.2.2| | 1 |
| Rear Drive chain excessively loose |6.2.1d| | 1 |
| Rear Locking device|s| not correctly fitted which may make the motor bicycle dangerous to ride |6.2.1h| | 1 |
| Centre Rear Motorcycle structure insecure and likely to affect the correct functioning of the steering or braking |6.1.1c| | 1 |
| Nearside Rear Direction indicator affected by the operation of another lamp |1.5.1c| | 1 |
| Rear Direction indicator deteriorated and function impaired |1.5.3a| | 1 |
| Offside Rear Direction indicator not working |1.5.1c| | 1 |
| Rear Brake pedal cannot be applied smoothly |3.1.3d| | 1 |
| Front Direction indicator not working |1.5.1c| | 1 |
| Rear Direction indicator not working |1.5.1c| | 1 |
| Rear Rear reflector on motorcycle missing |1.4.1| | 1 |
| Front Wheel spoke excessively loose |4.2.1b| | 1 |
| Front Front wheel bearings have excessive free play |2.3.5b| | 1 |
| Rear wheel spindle securing nut locking device insecure |2.4.A.2b| | 1 |
| Handlebar deformed |2.1.1b| | 1 |
| Throttle operating incorrectly |6.2.1f| | 1 |
| Offside Rear Footrest insecure |6.2.1a| | 1 |
| Horn missing |1.7.1| | 1 |
| Roller brake test No brake control achieves an efficiency of 30%. |3.3.A2a| | 1 |
| Rear reflector on motorcycle does not reflect squarely to the rear |1.4.1| | 1 |
| Stop lamp emits other than a steady red light |1.3.1b| | 1 |
| Rear position lamp incorrect colour |1.1.2b| | 1 |
| Rear Direction indicator light intensity significantly reduced |4.4.3 |a|| | 1 |
| Rear Position lamp adversely affected by the operation of another lamp |4.2.3 |b|| | 1 |
| Nearside Direction indicators not working |1.5.1c| | 1 |
| Front Steering movement excessively `notchy` with the weight on the lower bearing |2.2.1a| | 1 |
| Direction indicators affected by the operation of another lamp |1.5.1c| | 1 |
| Front Brake locking device insecure brake cable mount |3.2.A1e| | 1 |
| Brake locking device missing |3.2.A1e| | 1 |
| Brake lever has inadequate reserve travel |3.1.3b| | 1 |
| Rear position lamp deteriorated and function impaired |1.1.1b| | 1 |
| Direction indicator not working |1.5.1c| | 1 |
| Nearside Rear Direction indicator damaged and function impaired |1.5.3a| | 1 |
| Front Horn not working |1.7.3a| | 1 |
| Front Steering movement excessively rough with the weight on the lower bearing |2.2.1a| | 1 |
| Rear Drive chain worn to excess |6.2.1e| | 1 |
| Front Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 1 |
| Rear Direction indicator affected by the operation of another lamp |1.5.1c| | 1 |
| Headlamp switch faulty |1.2.4| | 1 |
| Horn control defective |1.7.2a| | 1 |
| Centre Rear Rear reflector on motorcycle missing |1.4.1| | 1 |
| Front Steering headbearing has excessive free play |2.2.2| | 1 |
| Steering movement excessively `notchy` with the wheel raised |2.2.1b| | 1 |
| Wheel spoke excessively loose |4.2.1b| | 1 |
| Rear suspension bush has excessive free play shock absorber lower bush |2.4.A2a|i|| | 1 |
| Drive chain excessively tight |6.2.1d| | 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 |
| Headlamp switch insecure |1.2.4| | 1 |
| Lower Rear mono-shock pivot excessively worn |2.4.B.4| | 1 |
| Brake lever cannot be applied smoothly |3.1.3d| | 1 |
| Exhaust is leaking and excessively noisey |7.1.1b| | 1 |
| Front wheel bearings have excessive free play |2.3.5b| | 1 |
| Rear wheel bearings have excessive free play |2.4.A.2c| | 1 |
| Steering headbearing has excessive free play |2.2.2| | 1 |
| Rear reflector on motorcycle incorrectly positioned |1.4.2d| | 1 |
| Riders seat insecure |6.2.1a| | 1 |
| Upper Rear suspension bush has excessive free play |2.4.A2a|i|| | 1 |
| Headlamp not working on main beam |4.1.1 |a| |ii|| | 1 |
| Nearside Rear Upper Direction indicator not working |4.4.1 |a| |ii|| | 1 |
| Central Front Upper Horn not working |1.7.3a| | 1 |
| Nearside Rear Lower Drive chain excessively loose |6.2.1d| | 1 |
| Fuel pipe leaking at filter |6.1.3 |b| |i|| | 1 |
| Front Brake caliper|s| securing bolt|s| loose |3.2.A1j| | 1 |
| Stop lamp remains on when the brake is released |1.3.1e| | 1 |
| Front Brake lever insecure |3.1.2a| | 1 |
| Chain guard insecure |6.2.1c| | 1 |
| Brake locking device missing incorrect adjuster nut fitted |3.2.A1e| | 1 |
| Central Front Upper Horn not working |7.7 |a| |ii|| | 1 |
| Offside Front Inner Wheel bearing rough when rotated |5.1.3 |b| |i|| | 1 |
| Front Stop lamp remains on when the brake is released |1.3.1e| | 1 |
| Rear suspension bush has excessive free play |2.4.A2a|i|| | 1 |
| Stop lamp not working (4.3.1 (a) (ii)) | 1 |
| Front Dipswitch does not operate immediately when selected on dipped beam (4.1.3 (b)) | 1 |
| Front Horn sound not in accordance with requirements (7.7 (c)) | 1 |
| Rear reflector missing (4.8.2 (a) (ii)) | 1 |
| Horn not working (7.7 (a) (ii)) | 1 |
| Drive chain so worn it is likely to fail (6.1.7 (c) (ii)) | 1 |
| Offside Front Shock absorber has a serious fluid leak (5.3.2 (b)) | 1 |
| Central Front Brake lining(s) less than 1.0 mm thick (1.1.13 (a)) | 1 |
| Rear Brake lining(s) less than 1.0 mm thick (1.1.13 (a)) | 1 |
| Front Position lamp not working (4.2.1 (a)) | 1 |
| Nearside Front Direction indicator not working (4.4.1 (a) (ii)) | 1 |
| Rear Suspension component missing (5.3.3 (a) (ii)) | 1 |
| Offside Front Upper Brake lever has insufficient reserve travel (1.1.2 (a)) | 1 |
| Rear Position lamp not working (4.2.1 (a)) | 1 |
| All direction indicators not working (4.4.1 (a) (ii)) | 1 |
| Horn not working (7.7 (a)) | 1 |
| Steering headbearing has excessive wear or free play centre steering stem bolt loose (2.2.2 (f) (i)) | 1 |
| Front Wheel spindle locking device missing (5.2.1 (d)) | 1 |
| Rear Wheel spindle locking device missing (5.2.1 (d)) | 1 |