| Most common failures | No# failures |
|---|
| Headlamp aim out of alignment | 185 |
| Drive chain excessively loose |6.2.1d| | 84 |
| Headlamp at least one does not illuminate on dipped beam |1.2.2a|i|| | 58 |
| Headlamp insecure |1.2.3b| | 58 |
| Front Roller brake test indicates a binding brake |3.3.A1a| | 56 |
| Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 49 |
| Registration plate issues | 43 |
| Front Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 41 |
| Rear Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 38 |
| Steering headbearing has excessive free play |2.2.2| | 37 |
| Exhaust is leaking and excessively noisey |7.1.1b| | 34 |
| Front position lamp does not illuminate immediately when switched on |1.1.3a| | 28 |
| Rear position lamp does not illuminate immediately when it is switched on |1.1.3a| | 25 |
| Riders seat insecure |6.2.1a| | 24 |
| Wheel alignment incorrect which adversely affects the handling |2.5.1| | 21 |
| Rear shock absorber has inadequate damping effect. |2.4.A.3b| | 19 |
| Drive chain worn to excess |6.2.1e| | 17 |
| Front Brake disc|s| excessively worn |3.2.A1l| | 17 |
| Direction indicators affected by the operation of another lamp |1.5.1c| | 16 |
| Front Headlamp at least one does not illuminate on dipped beam |1.2.2a|i|| | 15 |
| Headlamp at least one does not illuminate on main beam |1.2.2a|ii|| | 15 |
| Rear Brake lining|s| less than 1.5 mm thick |3.2.A1f|i|| | 15 |
| Stop lamp affected by the operation of another lamp |1.3.2| | 15 |
| Rear wheel bearings have excessive free play |2.4.A.2c| | 14 |
| Front position lamp insecure |1.1.1c| | 14 |
| Rear position lamp adversely affected by the operation of another lamp |1.1.3b| | 14 |
| Horn not working |1.7.3a| | 13 |
| Nearside Handlebar handgrip not secure to handlebars. |2.1.1c| | 13 |
| Front Wheel has an excessively distorted bead rim. |4.2.2| | 13 |
| Rear Brake pedal has inadequate reserve travel |3.1.3b| | 12 |
| Rear Stop lamp remains on when the brake is released |1.3.1e| | 12 |
| Steering movement excessively `notchy` with the wheel raised |2.2.1b| | 12 |
| Horn not loud enough to be heard by another road user |1.7.3a| | 12 |
| Headlamp aim beam image kick up to the offside |1.6| | 11 |
| Stop lamp remains on when the brake is released |1.3.1e| | 11 |
| Headlamp aim not tested |1.6| | 11 |
| Rear Roller brake test indicates a binding brake |3.3.A1a| | 10 |
| Front Floor brake test indicates a binding brake |3.3.C2c| | 10 |
| Drive chain excessively tight |6.2.1d| | 10 |
| Nearside Rear Footrest missing |6.2.1a| | 9 |
| Rear Brake pedal cannot be released smoothly |3.1.3d| | 9 |
| Rear Drive chain sprocket worn to excess |6.2.1e| | 9 |
| Rear Roller brake test indicates a sticking brake |3.3.A1a| | 9 |
| Offside Rear Footrest missing |6.2.1a| | 9 |
| Front Steering headbearing has excessive free play |2.2.2| | 9 |
| Direction indicators not working |1.5.1c| | 8 |
| Rear suspension bush has excessive free play |2.4.A2a|i|| | 8 |
| Rear Floor brake test indicates a sticking brake |3.3.C2c| | 8 |
| Front Headlamp insecure |1.2.3b| | 8 |
| Roller brake test The less effective brake control does not achieve an efficiency of 25%. |3.3.A2b| | 8 |
| Steering movement excessively `notchy` with the weight on the lower bearing |2.2.1a| | 8 |
| Horn is not a constant note |1.7.3c| | 8 |
| Direction indicators flashing more than 120 times per minute |1.5.1c| | 7 |
| Brake pedal has inadequate reserve travel |3.1.3b| | 7 |
| Front Exhaust is leaking and excessively noisey |7.1.1b| | 7 |
| Nearside Rear Direction indicators not working |1.5.1c| | 7 |
| Offside Front shock absorber seal failed and leaking oil |2.3.3| | 7 |
| Registration plate lamp issues | 6 |
| Rear Floor brake test indicates a binding brake |3.3.C2c| | 6 |
| Rear Wheel spoke excessively loose |4.2.1b| | 6 |
| Nearside Front shock absorber seal failed and leaking oil |2.3.3| | 6 |
| Offside Front Front shock absorber seal failed and leaking oil |2.3.3| | 6 |
| Rear Drive chain excessively loose |6.2.1d| | 6 |
| Front wheel bearings have excessive free play |2.3.5b| | 6 |
| Nearside Front Direction indicator not working |1.5.1c| | 6 |
| Rear suspension bearing has excessive free play |2.4.A2a|i|| | 6 |
| Rear Brake component has restricted free movement and operation is likely to be impeded |3.2.A1h| | 6 |
| Front Brake component has restricted free movement and operation is likely to be impeded |3.2.A1h| | 6 |
| Exhaust excessively deteriorated |7.1.1a| | 6 |
| Rear Wheel has an excessively distorted bead rim. |4.2.2| | 6 |
| Front Wheel spoke excessively loose |4.2.1b| | 5 |
| Brake pedal cannot be released smoothly |3.1.3d| | 5 |
| Exhaust mounting does not fully support the exhaust system |7.1.1.c| | 5 |
| Front Floor brake test indicates a sticking brake |3.3.C2c| | 5 |
| Stop lamp does not emit a steady light |1.3.1b| | 5 |
| Rear suspension movement is excessively stiff |2.4.A.3b| | 5 |
| Front shock absorber seal failed and leaking oil |2.3.3| | 5 |
| Front Roller brake test indicates a sticking brake |3.3.A1a| | 5 |
| Rear Direction indicator not working |1.5.1c| | 5 |
| Rear Footrest missing |6.2.1a| | 5 |
| Front Fork yoke deformed |2.1.1b| | 5 |
| Front position lamp damaged and function impaired |1.1.1b| | 5 |
| Headlamp main beam affected by the operation of another lamp |1.2.2c| | 4 |
| Front Brake disc|s| friction surface contaminated by oil or grease |3.2.A1k| | 4 |
| Front Brake excessively binding (1.2.1 (f)) | 4 |
| Brake pedal cannot be applied smoothly |3.1.3d| | 4 |
| Rear Brake pedal is damaged and the brake cannot be readily applied |3.1.3c| | 4 |
| Rear reflector on motorcycle missing |1.4.1| | 4 |
| Locking device|s| not correctly fitted which may make the motor bicycle dangerous to ride |6.2.1h| | 4 |
| Indicator tell tale not functioning |1.5.2| | 4 |
| Front Front suspension assembly component excessively bent |2.3.1| | 4 |
| Rear Rear wheel bearings have excessive free play |2.4.A.2c| | 4 |
| Front Direction indicator not working |1.5.1c| | 4 |
| Front Front position lamp does not illuminate immediately when switched on |1.1.3a| | 4 |
| Wheel alignment incorrect which adversely affects the steering |2.5.1| | 4 |
| Handlebar deformed |2.1.1b| | 4 |
| Roller brake test No brake control achieves an efficiency of 30%. |3.3.A2a| | 4 |
| Front Headlamp at least one does not illuminate on main beam |1.2.2a|ii|| | 4 |
| Rear Stop lamp affected by the operation of another lamp |1.3.2| | 4 |
| Headlamp aim headlamp deteriorated and function impaired |1.2.3a| | 4 |
| Direction indicator not working |1.5.1c| | 4 |
| Nearside Rear Direction indicator not working |1.5.1c| | 4 |
| Nearside Front Front shock absorber seal failed and leaking oil |2.3.3| | 4 |
| Front Footrest insecure |6.2.1a| | 4 |
| Front Horn not working |1.7.3a| | 3 |
| Stop lamp not working |4.3.1 |a| |ii|| | 3 |
| Nearside Direction indicators not working |1.5.1c| | 3 |
| Horn sounds harsh or grating |1.7.3c| | 3 |
| Offside Front Shock absorber has a serious fluid leak (5.3.2 (b)) | 3 |
| Front Wheel damaged significantly reducing the original strength |4.2.1a| | 3 |
| Offside Rear Direction indicators not working |1.5.1c| | 3 |
| Nearside Front Direction indicators not working |1.5.1c| | 3 |
| Offside Front Direction indicators not working |1.5.1c| | 3 |
| Headlamp aim headlamp damaged and function impaired |1.2.3a| | 3 |
| Front Direction indicator flashing more than 120 times per minute |1.5.1c| | 3 |
| Front Drive chain sprocket worn to excess |6.2.1e| | 3 |
| All position lamps do not illuminate immediately when switched on |1.1.3a| | 3 |
| Horn is not continous or uniform |1.7.3c| | 3 |
| Rear Position lamp not working (4.2.1 (a)) | 3 |
| Fairings insecure and likely to impede the steering |2.1.2e| | 3 |
| Direction indicator affected by the operation of another lamp |1.5.1c| | 3 |
| Front position lamp adversely affected by the operation of another lamp |1.1.3b| | 3 |
| Headlamp dipped beam affected by the operation of another lamp |1.2.2c| | 3 |
| Stop lamp affected by the operation of the horn |1.3.2| | 3 |
| Front An item not tested |Manual| | 3 |
| Rear Rear shock absorber seal failed and leaking oil |2.4.A.1c| | 3 |
| Front Brake disc|s| excessively scored |3.2.A1l| | 3 |
| Motorcycle structure insecure and likely to affect the correct functioning of the steering or braking |6.1.1c| | 3 |
| Offside Front Direction indicator not working |1.5.1c| | 3 |
| Rear Wheel spoke missing |4.2.1b| | 3 |
| Front Brake disc|s| is excessively distorted |3.2.A1m| | 3 |
| Nearside Rear shock absorber has inadequate damping effect. |2.4.A.3b| | 3 |
| Offside Rear shock absorber has inadequate damping effect. |2.4.A.3b| | 3 |
| Steering movement excessively stiff with the weight on the lower bearing |2.2.1a| | 3 |
| Offside Front Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 3 |
| Rear Drive chain sprocket carrier worn to excess |6.2.1e| | 3 |
| Offside Rear Rear shock absorber has inadequate damping effect. |2.4.A.3b| | 3 |
| Front Steering movement excessively `notchy` with the wheel raised |2.2.1b| | 3 |
| Drive chain sprocket carrier worn to excess |6.2.1e| | 3 |
| Direction indicators flashing less than 60 times a minute |1.5.1c| | 3 |
| Chain guard insecure |6.2.1c| | 3 |
| Front Front wheel bearings have excessive free play |2.3.5b| | 3 |
| Throttle operating incorrectly |6.2.1f| | 3 |
| Stop lamp remains on when the brakes are released | 3 |