| Most common failures | No# failures |
|---|
| Headlamp aim out of alignment | 10 |
| Rear reflector on motorcycle missing |1.4.1| | 8 |
| Drive chain excessively loose |6.2.1d| | 6 |
| Registration plate issues | 4 |
| Horn not working |1.7.3a| | 4 |
| Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 4 |
| Rear reflector on motorcycle obscured |1.4.1| | 4 |
| Headlamp insecure |1.2.3b| | 4 |
| Rear Drive chain sprocket worn to excess |6.2.1e| | 4 |
| Rear Roller brake test indicates a sticking brake |3.3.A1a| | 3 |
| Throttle operating incorrectly |6.2.1f| | 3 |
| Wheel alignment incorrect which adversely affects the steering |2.5.1| | 3 |
| Drive chain excessively tight |6.2.1d| | 3 |
| Front wheel bearings have excessive free play |2.3.5b| | 3 |
| Rear wheel bearings have excessive free play |2.4.A.2c| | 3 |
| Drive chain worn to excess |6.2.1e| | 3 |
| Front Brake lever is so short and the brake cannot be readily applied |3.1.3c| | 2 |
| Front Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 2 |
| Vehicle identification number not legible |6.3.5a| | 2 |
| Rear Footrest missing |6.2.1a| | 2 |
| Rear position lamp does not illuminate immediately when it is switched on |1.1.3a| | 2 |
| Offside Handlebar handgrip not secure to handlebars. |2.1.1c| | 2 |
| Horn not loud enough to be heard by another road user |1.7.3a| | 2 |
| Locking device|s| not correctly fitted which may make the motor bicycle dangerous to ride |6.2.1h| | 2 |
| Wheel alignment incorrect which adversely affects the handling |2.5.1| | 2 |
| Centre Rear Lower Rear mono-shock pivot excessively worn |2.4.B.4| | 1 |
| Rear suspension movement is excessively stiff |2.4.A.3b| | 1 |
| Front Brake master cylinder leaking hydraulic fluid |3.2.B1e| | 1 |
| Rear mono-shock pivot excessively worn |2.4.B.4| | 1 |
| Brake component has an inadequate repair Incorrect pivot used on rear brake adjuster |3.1.5| | 1 |
| Brake pedal cannot be released smoothly |3.1.3d| | 1 |
| Drive chain horseshoe locking device incorrectly fitted |6.1.7 |j| |i|| | 1 |
| Nearside Front Direction indicator not working |4.4.1 |a| |ii|| | 1 |
| Offside Front Direction indicator not working |4.4.1 |a| |ii|| | 1 |
| Riders seat insecure |6.2.1a| | 1 |
| Front Brake lever is bent and the brake cannot be readily applied |3.1.3c| | 1 |
| Front Brake lever has inadequate reserve travel |3.1.3b| | 1 |
| Headlamp at least one does not illuminate on dipped beam |1.2.2a|i|| | 1 |
| Steering movement excessively stiff with the wheel raised |2.2.1b| | 1 |
| Exhaust is leaking and excessively noisey |7.1.1b| | 1 |
| Rear position lamp insecure |1.1.1c| | 1 |
| Headlamp aim headlamp damaged and function impaired |1.2.3a| | 1 |
| Front mudguard insecure |2.3.7| | 1 |
| Brake hose damaged | 1 |
| Brake hose is likely to be fouled or trapped by moving parts |3.2.B2c| | 1 |
| Offside Front Front shock absorber seal failed and leaking oil |2.3.3| | 1 |
| Indicator switch insecure also throttle insicure |1.5.4| | 1 |
| Rear Rear reflector missing (4.8.2 (a) (ii)) | 1 |
| Rear Stop lamp switch with a delay in operation (4.3.2 (a) (ii)) | 1 |
| Rear Exhaust system insecure exhaust fouling rear shock/spring (6.1.2 (a)) | 1 |
| Drive chain so loose it is likely to fail chain likely to become detached (6.1.7 (c) (ii)) | 1 |
| Drive chain excessively loose (6.1.7 (c) (i)) | 1 |
| Registration plate lamp issues | 1 |
| Direction indicator not working offside front. |4.4.1 |a| |ii|| | 1 |
| Locking device|s| not correctly fitted which may make the motor bicycle dangerous to ride chain link |6.2.1h| | 1 |
| Rear Wheel spoke missing |4.2.1b| | 1 |
| Drive chain excessively tight (6.1.7 (k) (i)) | 1 |
| Rear Floor brake test indicates a binding brake |3.3.C2c| | 1 |
| Offside Front Direction indicators not working |1.5.1c| | 1 |
| Direction indicators flashing more than 120 times per minute |1.5.1c| | 1 |
| Front Wheel spoke excessively loose |4.2.1b| | 1 |
| Brake pedal has inadequate reserve travel |3.1.3b| | 1 |
| Stop lamp does not emit a steady light front brake micro switch |1.3.1b| | 1 |
| Brake disc|s| excessively worn 2.39mm has min 3.5mm |3.2.A1l| | 1 |
| Rear Brake disc|s| has excessive run out badly distorted causes judder when braking |3.2.A1m| | 1 |
| Wheel alignment incorrect which adversely affects the steering front appears to be twisted |2.5.1| | 1 |
| Vehicle identification number not permanently displayed |6.3.5a| | 1 |
| Wheel alignment incorrect which adversely affects the handling incorrectly adjusted at the rear wheel, adjuster plate deformed |2.5.1| | 1 |
| Nearside Drive chain excessively loose |6.2.1d| | 1 |
| Front Drive chain sprocket worn to excess |6.2.1e| | 1 |
| Nearside Drive chain worn to excess |6.2.1e| | 1 |
| Offside Steering control handlebar movement restricted by trapped cables |2.1.2c| | 1 |
| Nearside Front shock absorber seal failed and leaking oil |2.3.3| | 1 |
| Chain guard insecure |6.2.1c| | 1 |
| Rear wheel rotation likely to be impeded |6.2.1b| | 1 |
| Brake lever has inadequate reserve travel |3.1.3b| | 1 |
| Dipswitch does not deflect the main beam/s, making them into dipped beam/s |1.2.2b|ii|| | 1 |
| Front Direction indicator not working |1.5.1c| | 1 |
| Rear Direction indicator not working |1.5.1c| | 1 |
| Rear Drive chain worn to excess |6.2.1e| | 1 |
| Rear Brake linkage excessively corroded |3.2.A1c| | 1 |
| Centre Rear reflector on motorcycle missing |1.4.1| | 1 |
| Offside Front Direction indicator with a multiple light source more than 1/2 not functioning (4.4.1 (a) (ii)) | 1 |
| Nearside Front Lower Shock absorber has a serious fluid leak (5.3.2 (b)) | 1 |
| Rear Wheel has an excessively eccentric bead rim. |4.2.2| | 1 |
| Horn sounds harsh or grating |1.7.3c| | 1 |
| Rear Roller brake test indicates a binding brake |3.3.A1a| | 1 |
| Front Front wheel bearings have excessive free play |2.3.5b| | 1 |
| Front Front shock absorber seal failed and leaking oil |2.3.3| | 1 |
| Brake locking device insecure |3.2.A1e| | 1 |
| Rear Brake locking device insecure |3.2.A1e| | 1 |
| Offside Rear Direction indicators not working |1.5.1c| | 1 |
| Headlamp aim not tested |1.6| | 1 |
| Front wheel bearings are excessively rough |2.3.5b| | 1 |
| Roller brake test The less effective brake control does not achieve an efficiency of 25%. |3.3.A2b| | 1 |
| Drive chain worn to excess twisted |6.2.1e| | 1 |
| Steering movement excessively `notchy` with the weight on the lower bearing |2.2.1a| | 1 |
| Steering movement excessively `notchy` with the wheel raised |2.2.1b| | 1 |
| Lower Rear suspension bush has excessive free play linkage |2.4.A2a|i|| | 1 |
| Rear suspension bearing has excessive free play swing arm |2.4.A2a|i|| | 1 |
| Rear suspension component loose swing arm |2.4.A.1a| | 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 |
| Stop lamp does not illuminate immediately a brake applies rear brake applied |1.3.1a| | 1 |
| Stop lamp affected by the operation of another lamp |1.3.2| | 1 |
| Front Roller brake test indicates excessive fluctuation of brake effort |3.3.A1d| | 1 |
| Front Roller brake test indicates a binding brake |3.3.A1a| | 1 |
| Rear Rear suspension bush has excessive free play |2.4.A2a|i|| | 1 |
| Rear Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 1 |
| Rear Rear wheel bearings have excessive free play |2.4.A.2c| | 1 |