| Most common failures | No# failures |
|---|
| Rear reflector on motorcycle missing |1.4.1| | 9 |
| Rear Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 9 |
| Drive chain excessively loose |6.2.1d| | 8 |
| Rear position lamp does not illuminate immediately when it is switched on |1.1.3a| | 6 |
| Headlamp aim out of alignment | 6 |
| Front Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 6 |
| Headlamp at least one does not illuminate on dipped beam |1.2.2a|i|| | 5 |
| Steering headbearing has excessive free play |2.2.2| | 5 |
| Horn not working |1.7.3a| | 4 |
| Roller brake test No brake control achieves an efficiency of 30%. |3.3.A2a| | 4 |
| Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 3 |
| Offside Front Direction indicator not working |1.5.1c| | 3 |
| Rear wheel bearings have excessive free play |2.4.A.2c| | 3 |
| Lower Steering headbearing has excessive free play |2.2.2| | 3 |
| Registration plate issues | 3 |
| Rear suspension bush has excessive free play |2.4.A2a|i|| | 2 |
| Front position lamp does not illuminate immediately when switched on |1.1.3a| | 2 |
| Locking device|s| not correctly fitted which may make the motor bicycle dangerous to ride |6.2.1h| | 2 |
| Drive chain excessively tight |6.2.1d| | 2 |
| Handlebar deformed |2.1.1b| | 2 |
| Nearside Rear Direction indicator not working |1.5.1c| | 2 |
| Front Wheel has an excessively distorted bead rim. |4.2.2| | 2 |
| Nearside Rear Direction indicators not working |1.5.1c| | 2 |
| Roller brake test Neither brake control achieves an efficiency of 25% |3.3.A2b| | 2 |
| Front Horn not loud enough to be heard by another road user |1.7.3a| | 2 |
| Lower Rear suspension bush has excessive free play |2.4.A2a|i|| | 2 |
| Offside Front shock absorber seal failed and leaking oil |2.3.3| | 2 |
| Nearside Handlebar handgrip not secure to handlebars. |2.1.1c| | 2 |
| Rear Roller brake test indicates a binding brake |3.3.A1a| | 2 |
| Front Headlamp insecure |1.2.3b| | 2 |
| Rear mono-shock pivot excessively worn |2.4.B.4| | 1 |
| Throttle has a significant change in engine speed whilst moving the steering from lock to lock |2.1.4| | 1 |
| Nearside Direction indicator flashing less than 60 times a minute |1.5.1c| | 1 |
| Offside Direction indicator flashing more than 120 times per minute |1.5.1c| | 1 |
| Rear Roller brake test indicates excessive fluctuation of brake effort |3.3.A1d| | 1 |
| Wheel alignment incorrect which adversely affects the handling |2.5.1| | 1 |
| Headlamp aim beam image kick up to the offside |1.6| | 1 |
| Stop lamp deteriorated and function impaired |1.3.3a| | 1 |
| Front wheel bearings have excessive free play |2.3.5b| | 1 |
| Front Upper Headlamp at least one does not illuminate on dipped beam |1.2.2a|i|| | 1 |
| Offside Rear Lower Brake hose is likely to be fouled or trapped by moving parts |3.2.B2c| | 1 |
| Rear Lower Rear wheel bearings have excessive free play |2.4.A.2c| | 1 |
| Offside Rear Direction indicator not working |1.5.1c| | 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 |
| Nearside Rear Direction indicator insecure |1.5.3b| | 1 |
| Front Headlamp aim not tested |1.6| | 1 |
| Rear Brake hose excessively kinked |3.2.B3a| | 1 |
| Rear Rear reflector on motorcycle damaged and function impaired |1.4.2a| | 1 |
| Rear Rear position lamp damaged and function impaired |1.1.1b| | 1 |
| Front Headlamp at least one does not illuminate on dipped beam |1.2.2a|i|| | 1 |
| Horn sounds harsh or grating |1.7.3c| | 1 |
| Offside Rear Brake hose excessively kinked |3.2.B3a| | 1 |
| Rear wheel spindle securing nut locking device missing |2.4.A.2b| | 1 |
| Rear Rear position lamp does not illuminate immediately when it is switched on |1.1.3a| | 1 |
| Offside Front Direction indicators not working |1.5.1c| | 1 |
| Front Handlebar deformed |2.1.1b| | 1 |
| Rear Front mudguard insecure |2.3.7| | 1 |
| Rear Brake hose leaking fluid |3.2.B4| | 1 |
| Offside Direction indicators not working |1.5.1c| | 1 |
| Rear Brake disc|s| securing bolt|s| loose |3.2.A1g| | 1 |
| Front Brake lever has inadequate reserve travel |3.1.3b| | 1 |
| Nearside Rear Direction indicator missing |1.5.1a| | 1 |
| Front Direction indicators affected by the operation of another lamp |1.5.1c| | 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 |
| Front Indicator tell tale not operating correctly |1.5.2| | 1 |
| Front Headlamp switch faulty |1.2.4| | 1 |
| Nearside Front Handlebar handgrip not secure to handlebars. |2.1.1c| | 1 |
| Front Riders seat insecure |6.2.1a| | 1 |
| Lower Rear suspension bush excessively deteriorated |2.4.A2a|i|| | 1 |
| Rear 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 Fuel system component leaking |7.2.1a| | 1 |
| Rear Brake disc|s| has excessive run out |3.2.A1m| | 1 |
| Throttle operating incorrectly |6.2.1f| | 1 |
| Stop lamp emits other than a steady red light |1.3.1b| | 1 |
| Nearside Front Lower Brake cylinder leaking hydraulic fluid |3.2.B1e| | 1 |
| Steering movement excessively stiff with the weight on the lower bearing |2.2.1a| | 1 |
| Direction indicators flashing more than 120 times per minute |1.5.1c| | 1 |
| Front Direction indicator flashing more than 120 times per minute |1.5.1c| | 1 |
| Rear Direction indicator flashing more than 120 times per minute |1.5.1c| | 1 |
| Front Rear reflector on motorcycle missing |1.4.1| | 1 |
| Rear Suspension arm ball joint excessively worn (5.3.4 (a) (i)) | 1 |
| Front Shock absorber has negligible damping effect (5.3.2 (b)) | 1 |
| Rear Shock absorber has negligible damping effect (5.3.2 (b)) | 1 |
| Rear Wheel bearing has excessive play (5.1.3 (a) (i)) | 1 |
| Rear Stop lamp not working |4.3.1 |a| |ii|| | 1 |
| Drive chain worn to excess |6.2.1e| | 1 |
| Offside Rear Footrest insecure |6.2.1a| | 1 |
| Nearside Front shock absorber seal failed and leaking oil |2.3.3| | 1 |
| Brake pedal insecure |3.1.2a| | 1 |
| Offside Front suspension fouling which affects the movement of the front suspension. |2.3.6a| | 1 |
| Rear Wheel alignment incorrect which adversely affects the handling |2.5.1| | 1 |
| Exhaust is leaking and excessively noisey |7.1.1b| | 1 |
| Nearside Front Direction indicator not working |1.5.1c| | 1 |
| Lower Rear mono-shock pivot excessively worn |2.4.B.4| | 1 |
| Rear Brake disc|s| securing bolt|s| missing |3.2.A1g| | 1 |
| Offside Handlebar handgrip not secure to handlebars. |2.1.1c| | 1 |
| Direction indicators affected by the operation of another lamp |1.5.1c| | 1 |
| Nearside Front Brake lever is so short and the brake cannot be readily applied |3.1.3c| | 1 |
| Nearside Front Brake lever insecure |3.1.2a| | 1 |
| Nearside Front Locking devices not correctly fitted which may make the motor bicycle dangerous to ride |6.2.1h| | 1 |
| Rear Roller brake test indicates brake effort fall disproportional to brake lever or pedal effort |3.3.A1c| | 1 |
| Roller brake test The less effective brake control does not achieve an efficiency of 25%. |3.3.A2b| | 1 |
| Rear Rear reflector on motorcycle obscured |1.4.1| | 1 |
| Rear Brake pipe inadequately supported |3.2.B2b| | 1 |
| Centre Rear position lamp does not illuminate immediately when it is switched on |1.1.3a| | 1 |
| Centre Rear reflector on motorcycle missing |1.4.1| | 1 |
| Front Headlamp aim beam image too far to the left |1.6.4| | 1 |
| Rear Rear wheel bearings have excessive free play |2.4.A.2c| | 1 |
| Rear Floor brake test The less effective brake control does not achieve an efficiency of 25%. |3.3.C1b| | 1 |
| Rear Exhaust excessively deteriorated |7.1.1a| | 1 |
| Headlamp switch faulty |1.2.4| | 1 |
| Stop lamp affected by the operation of another lamp |1.3.2| | 1 |
| Offside Direction indicator not working |1.5.1c| | 1 |
| Horn not loud enough to be heard by another road user |1.7.3a| | 1 |
| Nearside Steering lock stop ineffective |2.1.3| | 1 |
| Offside Steering lock stop ineffective |2.1.3| | 1 |
| Front wheel bearings are excessively rough |2.3.5b| | 1 |
| Nearside Front Front shock absorber seal failed and leaking oil |2.3.3| | 1 |
| Offside Front Front shock absorber seal failed and leaking oil |2.3.3| | 1 |
| Rear Brake master cylinder leaking hydraulic fluid |3.2.B1e| | 1 |