| Most common failures | No# failures |
|---|
| Front Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 15 |
| Headlamp aim out of alignment | 13 |
| Rear position lamp does not illuminate immediately when it is switched on |1.1.3a| | 10 |
| Rear reflector on motorcycle missing |1.4.1| | 10 |
| Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 10 |
| Headlamp at least one does not illuminate on dipped beam |1.2.2a|i|| | 9 |
| Drive chain excessively loose |6.2.1d| | 9 |
| Rear wheel bearings have excessive free play |2.4.A.2c| | 9 |
| Registration plate issues | 8 |
| Rear Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 7 |
| Locking device|s| not correctly fitted which may make the motor bicycle dangerous to ride |6.2.1h| | 6 |
| Horn not loud enough to be heard by another road user |1.7.3a| | 5 |
| Rear Rear reflector on motorcycle missing |1.4.1| | 5 |
| Nearside Front Front shock absorber seal failed and leaking oil |2.3.3| | 5 |
| Rear Roller brake test indicates a binding brake |3.3.A1a| | 4 |
| Front position lamp does not illuminate immediately when switched on |1.1.3a| | 4 |
| Rear reflector on motorcycle obscured |1.4.1| | 4 |
| Nearside Front shock absorber seal failed and leaking oil |2.3.3| | 4 |
| Front Brake lever is so short and the brake cannot be readily applied |3.1.3c| | 4 |
| Front Brake lever is damaged and the brake cannot be readily applied |3.1.3c| | 3 |
| Offside Handlebar handgrip not secure to handlebars. |2.1.1c| | 3 |
| Wheel alignment incorrect which adversely affects the handling |2.5.1| | 3 |
| Front Roller brake test indicates a binding brake |3.3.A1a| | 3 |
| Headlamp dipped beam affected by the operation of another lamp |1.2.2c| | 3 |
| Drive chain worn to excess |6.2.1e| | 3 |
| Front shock absorber seal failed and leaking oil |2.3.3| | 3 |
| Roller brake test The less effective brake control does not achieve an efficiency of 25%. |3.3.A2b| | 3 |
| Rear Rear wheel bearings have excessive free play |2.4.A.2c| | 3 |
| Offside Front shock absorber seal failed and leaking oil |2.3.3| | 3 |
| Fuel cap sealing washer missing |7.2.2c| | 3 |
| Rear Wheel spoke excessively loose |4.2.1b| | 3 |
| Roller brake test Neither brake control achieves an efficiency of 25% |3.3.A2b| | 2 |
| Nearside Rear Direction indicator not working |1.5.1c| | 2 |
| Horn not working |1.7.3a| | 2 |
| Headlamp aim not tested |1.6| | 2 |
| Front Headlamp at least one does not illuminate on main beam |1.2.2a|ii|| | 2 |
| Wheel alignment incorrect which adversely affects the steering |2.5.1| | 2 |
| Roller brake test No brake control achieves an efficiency of 30%. |3.3.A2a| | 2 |
| Rear Drive chain sprocket worn to excess |6.2.1e| | 2 |
| Front Wheel has an excessively distorted bead rim. |4.2.2| | 2 |
| Front Headlamp at least one does not illuminate on dipped beam |1.2.2a|i|| | 2 |
| Front Front mudguard can easily contact any fixed point of the motor bicycle. |2.3.7| | 2 |
| Front Wheel spoke missing |4.2.1b| | 2 |
| Nearside Handlebar handgrip not secure to handlebars. |2.1.1c| | 2 |
| Offside Front wheel spindle securing nut|s| loose |2.3.5a| | 2 |
| Handlebar deformed |2.1.1b| | 2 |
| Rear Wheel spoke cracked. |4.2.1b| | 2 |
| Steering control fouling between components which interferes with the free movement of the steering |2.1.2a| | 2 |
| Front Brake master cylinder leaking hydraulic fluid |3.2.B1e| | 2 |
| Rear Wheel spoke missing |4.2.1b| | 2 |
| Rear Wheel has an excessively distorted bead rim. |4.2.2| | 2 |
| Front wheel bearings have excessive free play |2.3.5b| | 2 |
| Headlamp at least one does not illuminate on main beam |1.2.2a|ii|| | 2 |
| Wheel alignment incorrect which adversely affects the steering (2.4 (a)) | 2 |
| Rear wheel bearings have excessive free play (2.4.A.2c) | 2 |
| Rear reflector on motorcycle missing (1.4.1) | 2 |
| Rear Wheel spoke missing (4.2.1b) | 2 |
| Roller brake test The less effective brake control does not achieve an efficiency of 25% (1.2.2 (a) (i)) | 2 |
| Offside Rear Direction indicators not working |1.5.1c| | 1 |
| Front Clutch lever shortened so it cannot be readily operated. |6.2.1g| | 1 |
| Stop lamp does not illuminate immediately a brake applies both |1.3.1a| | 1 |
| Exhaust mounting does not fully support the exhaust system |7.1.1.c| | 1 |
| Front Headlamp at least one does not illuminate on main beam both |1.2.2a|ii|| | 1 |
| Rear Brake caliper|s| insecure |3.2.A1j| | 1 |
| Nearside Direction indicator deteriorated and function impaired |1.5.3a| | 1 |
| Headlamp insecure |1.2.3b| | 1 |
| Rear Wheel has an excessively eccentric bead rim. |4.2.2| | 1 |
| Offside Front Direction indicator not working |1.5.1c| | 1 |
| Nearside Direction indicators not working |1.5.1c| | 1 |
| Offside Direction indicators not working |1.5.1c| | 1 |
| Rear wheel spindle securing nut locking device missing |2.4.A.2b| | 1 |
| Steering movement excessively stiff with the wheel raised |2.2.1b| | 1 |
| Direction indicator deteriorated and function impaired |1.5.3a| | 1 |
| Horn sounds harsh or grating |1.7.3c| | 1 |
| Steering movement excessively `notchy` with the wheel raised |2.2.1b| | 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 |
| Riders seat insecure |6.2.1a| | 1 |
| Drive chain excessively tight |6.2.1d| | 1 |
| Direction indicators flashing more than 120 times per minute |1.5.1c| | 1 |
| Offside Rear Direction indicator incorrect colour |1.5.1b| | 1 |
| Rear Wheel alignment incorrect which adversely affects the handling |2.5.1| | 1 |
| Exhaust is leaking and excessively noisey |7.1.1b| | 1 |
| Headlamp switch insecure |1.2.4| | 1 |
| Front Brake disc|s| friction surface contaminated by oil or grease |3.2.A1k| | 1 |
| Rear suspension bush has excessive free play |2.4.A2a|i|| | 1 |
| Front Roller brake test indicates a sticking brake |3.3.A1a| | 1 |
| Front Roller brake test indicates brake effort rise disproportional to brake lever or pedal effort |3.3.A1c| | 1 |
| Nearside Front Clutch lever positioned so it cannot be readily operated. |6.2.1g| | 1 |
| Nearside Front Lower Front shock absorber seal failed and leaking oil |2.3.3| | 1 |
| Offside Front Lower Front shock absorber seal failed and leaking oil |2.3.3| | 1 |
| Centre Front Headlamp insecure |1.2.3b| | 1 |
| Nearside Upper Headlamp switch insecure |1.2.4| | 1 |
| Nearside Upper Indicator switch insecure |1.5.4| | 1 |
| Nearside Upper Horn control not readily accesible. |1.7.2a| | 1 |
| Centre Front Headlamp aim headlamp damaged and function impaired |1.2.3a| | 1 |
| Offside Rear Lower Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 1 |
| Nearside Rear Lower Locking device|s| not correctly fitted which may make the motor bicycle dangerous to ride |6.2.1h| | 1 |
| Rear Rear mono-shock pivot seized |2.4.B.4| | 1 |
| Rear Drive chain excessively tight |6.2.1d| | 1 |
| Wheel has an excessively distorted bead rim. |4.2.2| | 1 |
| Fork yoke fractured |2.1.1b| | 1 |
| Brake performance not tested |3.3| | 1 |
| An item not tested |Manual| | 1 |
| Offside Front Front shock absorber seal failed and leaking oil |2.3.3| | 1 |
| Front wheel spindle loose |2.3.5a| | 1 |
| Lower Front suspension assembly component loose |2.3.1| | 1 |
| Steering movement excessively `notchy` with the weight on the lower bearing |2.2.1a| | 1 |
| Direction indicators flashing less than 60 times a minute |1.5.1c| | 1 |
| Front Direction indicator not working |1.5.1c| | 1 |
| Rear Direction indicator not working |1.5.1c| | 1 |
| Indicator switch insecure |1.5.4| | 1 |
| Rear Direction indicator damaged and function impaired |1.5.3a| | 1 |
| Nearside Headlamp aim not tested |1.6| | 1 |
| Offside Headlamp aim not tested |1.6| | 1 |
| Front Brake locking device missing |3.2.A1e| | 1 |
| Front position lamp insecure |1.1.1c| | 1 |
| Front Brake lever has inadequate reserve travel |3.1.3b| | 1 |
| Rear Brake component has an inadequate repair |3.1.5| | 1 |
| Rear Wheel spoke excessively bent |4.2.1b| | 1 |
| Front wheel insecure |4.2.3b| | 1 |
| Offside Front Direction indicator missing |1.5.1a| | 1 |
| Nearside Front Direction indicator missing |1.5.1a| | 1 |
| Nearside Rear Direction indicator missing |1.5.1a| | 1 |
| Offside Rear Direction indicator missing |1.5.1a| | 1 |
| Rear Brake lever has inadequate reserve travel |3.1.3b| | 1 |
| Rear shock absorber has inadequate damping effect. |2.4.A.3b| | 1 |
| Rear Locking devices not correctly fitted which may make the motor bicycle dangerous to ride |6.2.1h| | 1 |
| Offside Rear Direction indicator insecure |1.5.3b| | 1 |
| All position lamps do not illuminate immediately when switched on |1.1.3a| | 1 |
| Stop lamp does not illuminate immediately a brake applies stop lamp doesn`t come on with either brake applied |1.3.1a| | 1 |
| Fuel cap does not fasten securely maintaining the sealing arrangement |7.2.2b| | 1 |
| Rear Brake disc|s| cracked |3.2.A1g| | 1 |
| Front Roller brake test indicates brake effort fall disproportional to brake lever or pedal effort |3.3.A1c| | 1 |
| Rear Brake caliper|s| securing bolt|s| missing |3.2.A1j| | 1 |
| Rear Footrest missing |6.2.1a| | 1 |
| Brake pedal is inoperative |3.1.3c| | 1 |
| Floor brake test The less effective brake control does not achieve an efficiency of 25%. |3.3.C1b| | 1 |
| Direction indicator flashing more than 120 times per minute |1.5.1c| | 1 |
| Horn is not continous or uniform |1.7.3c| | 1 |
| Rear Brake lever excessively damaged |3.2.A1c| | 1 |
| Front Brake disc|s| excessively worn |3.2.A1l| | 1 |
| Front wheel spindle loose |2.3.3a| | 1 |
| Rear Brake master cylinder insecurely mounted |3.2.B1a| | 1 |
| Front Steering movement excessively stiff with the wheel raised |2.2.1b| | 1 |
| Front Brake lining|s| contaminated by oil or grease |3.2.A1k| | 1 |
| Front Brake lining|s| less than 1.5 mm thick |3.2.A1f|i|| | 1 |
| Brake lever is so short and the brake cannot be readily applied |3.1.3c| | 1 |
| Front Front wheel spindle securing nut locking device insecure |2.3.3a| | 1 |
| Front Front shock absorber seal failed and leaking oil |2.3.3| | 1 |
| Nearside Direction indicator flashing more than 120 times per minute |1.5.1c| | 1 |
| Offside Front Brake lever is so short and the brake cannot be readily applied |3.1.3c| | 1 |
| Rear Brake pedal has inadequate reserve travel |3.1.3b| | 1 |
| Nearside Front Direction indicator flashing less than 60 times a minute |1.5.1c| | 1 |
| Offside Front Direction indicator flashing less than 60 times a minute |1.5.1c| | 1 |
| Rear Direction indicator flashing less than 60 times a minute |1.5.1c| | 1 |
| Offside Rear Direction indicator flashing less than 60 times a minute |1.5.1c| | 1 |
| Brake pedal pivots excessively worn |3.1.3a| | 1 |
| Brake pedal cannot be released smoothly |3.1.3d| | 1 |
| Direction indicators affected by the operation of another lamp |1.5.1c| | 1 |
| All position lamps adversely affected by the operation of another lamp |1.1.3b| | 1 |
| Rear Exhaust mounting missing |7.1.1c| | 1 |
| Rear Exhaust mounting does not fully support the exhaust system |7.1.1.c| | 1 |
| Front Wheel alignment incorrect which adversely affects the steering |2.5.1| | 1 |
| Front Steering headbearing has excessive free play |2.2.2| | 1 |
| Throttle operating incorrectly |6.2.1f| | 1 |
| Nearside Rear Footrest missing |6.2.1a| | 1 |
| Offside Rear Footrest missing |6.2.1a| | 1 |
| Offside Front Shock absorber has a serious fluid leak Fork seal leaking (5.3.2 (b)) | 1 |
| Fuel cap ineffective (6.1.3 (b) (i)) | 1 |
| Horn not working (7.7 (a) (ii)) | 1 |
| Chain guard insecure (6.1.7 (i)) | 1 |
| Nearside Direction indicator not working (4.4.1 (a) (ii)) | 1 |
| Wheel alignment incorrect which adversely affects the handling (2.4 (a)) | 1 |
| Drive chain excessively loose (6.1.7 (c) (i)) | 1 |
| Rear Shock absorber has a serious fluid leak (5.3.2 (b)) | 1 |
| Rear Shock absorber has negligible damping effect (5.3.2 (b)) | 1 |
| Front position lamp does not illuminate immediately when switched on (1.1.3a) | 1 |
| Headlamp aim not tested (1.6) | 1 |
| Stop lamp does not illuminate immediately a brake applies (1.3.1a) | 1 |
| Roller brake test The less effective brake control does not achieve an efficiency of 25%. (3.3.A2b) | 1 |
| Horn not working (1.7.3a) | 1 |
| Rear Rear shock absorber has inadequate damping effect. (2.4.A.3b) | 1 |
| Front Headlamp dipped beam affected by the operation of another lamp (1.2.2c) | 1 |
| Front Headlamp main beam affected by the operation of another lamp (1.2.2c) | 1 |
| Rear Rear position lamp does not illuminate immediately when it is switched on (1.1.3a) | 1 |
| Rear Drive chain excessively tight (6.2.1d) | 1 |
| Rear Wheel spoke cracked. (4.2.1b) | 1 |
| Front Headlamp aim headlamp damaged and function impaired (1.2.3a) | 1 |
| Steering lock stop missing (2.1.3) | 1 |
| Drive chain excessively loose (6.2.1d) | 1 |
| Offside Front Fairings insecure and likely to impede the steering (2.1.2e) | 1 |
| Front wheel bearings are excessively rough (2.3.5b) | 1 |
| Front wheel bearings have excessive free play (2.3.5b) | 1 |
| Drive chain fouling another component (6.2.1d) | 1 |
| Rear position lamp does not illuminate immediately when it is switched on (1.1.3a) | 1 |
| Rear Stop lamp does not illuminate immediately a brake applies (1.3.1a) | 1 |
| Nearside Front shock absorber seal failed and leaking oil (2.3.3) | 1 |
| Offside Rear Direction indicator insecure (1.5.3b) | 1 |
| Rear Wheel spoke excessively loose (4.2.1b) | 1 |
| Drive chain so loose it is likely to fail (6.1.7 (c) (ii)) | 1 |
| Nearside Front Direction indicator not working (4.4.1 (a) (ii)) | 1 |
| Headlamp not working on dipped beam (4.1.1 (a) (ii)) | 1 |
| Front Position lamp not working (4.2.1 (a)) | 1 |
| Rear Position lamp not working (4.2.1 (a)) | 1 |
| Steering headbearing has excessive wear or free play (2.2.2 (f) (i)) | 1 |
| Rear Stop lamp not working (4.3.1 (a) (ii)) | 1 |