| Most common failures | No# failures |
|---|
| Rear reflector on motorcycle missing |1.4.1| | 23 |
| Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 15 |
| Rear suspension bush has excessive free play |2.4.A2a|i|| | 13 |
| Front Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 12 |
| Drive chain excessively loose |6.2.1d| | 12 |
| Drive chain worn to excess |6.2.1e| | 10 |
| Steering headbearing has excessive free play |2.2.2| | 10 |
| Rear position lamp does not illuminate immediately when it is switched on |1.1.3a| | 9 |
| Headlamp at least one does not illuminate on dipped beam |1.2.2a|i|| | 9 |
| Headlamp at least one does not illuminate on main beam |1.2.2a|ii|| | 8 |
| Headlamp aim out of alignment | 8 |
| Nearside Front shock absorber seal failed and leaking oil |2.3.3| | 7 |
| Rear Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 6 |
| Rear Drive chain sprocket worn to excess |6.2.1e| | 6 |
| Wheel alignment incorrect which adversely affects the handling |2.5.1| | 6 |
| Riders seat insecure |6.2.1a| | 6 |
| Front position lamp does not illuminate immediately when switched on |1.1.3a| | 6 |
| Rear wheel bearings have excessive free play |2.4.A.2c| | 5 |
| Offside Rear Footrest missing |6.2.1a| | 5 |
| Registration plate issues | 4 |
| Headlamp aim beam image kick up to the offside |1.6| | 4 |
| Nearside Rear Footrest missing |6.2.1a| | 4 |
| Steering control handlebar movement restricted by trapped cables |2.1.2c| | 4 |
| Horn not loud enough to be heard by another road user |1.7.3a| | 4 |
| Exhaust is leaking and excessively noisey |7.1.1b| | 4 |
| Nearside Front Direction indicator not working |1.5.1c| | 4 |
| Nearside Rear Direction indicator not working |1.5.1c| | 4 |
| Rear suspension bearing has excessive free play |2.4.A2a|i|| | 4 |
| Offside Rear Direction indicator not working |1.5.1c| | 3 |
| Rear reflector on motorcycle obscured |1.4.1| | 3 |
| Offside Handlebar handgrip not secure to handlebars. |2.1.1c| | 3 |
| Offside Steering lock stop ineffective |2.1.3| | 3 |
| Horn not working |1.7.3a| | 3 |
| Steering lock stop ineffective |2.1.3| | 3 |
| Wheel alignment incorrect which adversely affects the steering |2.5.1| | 3 |
| Offside Front shock absorber seal failed and leaking oil |2.3.3| | 3 |
| Rear Brake hose is likely to be fouled or trapped by moving parts |3.2.B2c| | 3 |
| Roller brake test The less effective brake control does not achieve an efficiency of 25%. |3.3.A2b| | 3 |
| Drive chain excessively tight |6.2.1d| | 3 |
| Fuel system component insecure |7.2.1b| | 3 |
| Locking device|s| not correctly fitted which may make the motor bicycle dangerous to ride |6.2.1h| | 2 |
| Rear shock absorber has inadequate damping effect. |2.4.A.3b| | 2 |
| Rear Wheel alignment incorrect which adversely affects the handling |2.5.1| | 2 |
| Rear Roller brake test indicates excessive fluctuation of brake effort |3.3.A1d| | 2 |
| Front Stop lamp remains on when the brake is released |1.3.1e| | 2 |
| Headlamp dipped beam affected by the operation of another lamp |1.2.2c| | 2 |
| Exhaust mounting missing |7.1.1c| | 2 |
| Front Direction indicator not working |1.5.1c| | 2 |
| Front Headlamp at least one does not illuminate on dipped beam |1.2.2a|i|| | 2 |
| Nearside Rear suspension bush has excessive free play |2.4.A2a|i|| | 2 |
| Nearside Rear Drive chain excessively loose |6.2.1d| | 2 |
| Centre Rear Rear reflector on motorcycle missing |1.4.1| | 2 |
| Front Steering headbearing has excessive free play |2.2.2| | 2 |
| Rear Brake pedal has inadequate reserve travel |3.1.3b| | 2 |
| Headlamp main beam affected by the operation of another lamp |1.2.2c| | 2 |
| Handlebar deformed |2.1.1b| | 2 |
| Headlamp insecure |1.2.3b| | 2 |
| Direction indicators flashing more than 120 times per minute |1.5.1c| | 2 |
| Offside Rear Direction indicators not working |1.5.1c| | 2 |
| Brake pedal is bent and the brake cannot be readily applied |3.1.3c| | 2 |
| Steering movement excessively stiff with the wheel raised |2.2.1b| | 2 |
| Nearside Handlebar handgrip not secure to handlebars. |2.1.1c| | 2 |
| Nearside Front Front shock absorber seal failed and leaking oil |2.3.3| | 2 |
| Nearside Rear Direction indicator insecure |1.5.3b| | 2 |
| Direction indicator missing |1.5.1a| | 1 |
| Front Direction indicators not working |1.5.1c| | 1 |
| Offside Front Direction indicator insecure |1.5.3b| | 1 |
| Rear Rear shock absorber seal failed and leaking oil |2.4.A.1c| | 1 |
| Front wheel spindle securing nut locking device missing |2.3.5a| | 1 |
| Clutch lever positioned so it cannot be readily operated. |6.2.1g| | 1 |
| Brake lever insecure |3.1.2a| | 1 |
| Rear position lamp adversely affected by the operation of the horn |1.1.3b| | 1 |
| Nearside Headlamp switch insecure |1.2.4| | 1 |
| Offside Direction indicator not working |1.5.1c| | 1 |
| Nearside Direction indicator not working |1.5.1c| | 1 |
| Front position lamp insecure |1.1.1c| | 1 |
| Front Brake lever has inadequate reserve travel |3.1.3b| | 1 |
| Rear shock absorber seal failed and leaking oil |2.4.A.1c| | 1 |
| Rear Footrest missing |6.2.1a| | 1 |
| Rear Brake master cylinder leaking hydraulic fluid |3.2.B1e| | 1 |
| Nearside Clutch lever shortened so it cannot be readily operated. |6.2.1g| | 1 |
| Rear Floor brake test indicates a binding brake |3.3.C2c| | 1 |
| Rear Stop lamp remains on when the brake is released |1.3.1e| | 1 |
| Offside Rear Brake pedal has inadequate reserve travel |3.1.3b| | 1 |
| Front Exhaust is leaking and excessively noisey |7.1.1b| | 1 |
| Exhaust has part of the system missing |7.1.1a| | 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 |
| Nearside Footrest insecure |6.2.1a| | 1 |
| Throttle has a significant change in engine speed whilst moving the steering from lock to lock |2.1.4| | 1 |
| Rear wheel spindle loose |2.4.A.2b| | 1 |
| Lower Rear mono-shock pivot excessively worn |2.4.B.4| | 1 |
| Nearside Front Direction indicators not working |1.5.1c| | 1 |
| Offside Front Direction indicators not working |1.5.1c| | 1 |
| Offside Direction indicators not working |1.5.1c| | 1 |
| Rear Brake fluid reservoir fluid level dangerously low |3.2.B1d| | 1 |
| Nearside Front Handlebar handgrip not secure to handlebars. |2.1.1c| | 1 |
| Rear Lower Rear suspension bush has excessive free play |2.4.A2a|i|| | 1 |
| Direction indicators not working |1.5.1c| | 1 |
| Nearside Front Locking devices not correctly fitted which may make the motor bicycle dangerous to ride |6.2.1h| | 1 |
| Offside Front Locking devices not correctly fitted which may make the motor bicycle dangerous to ride |6.2.1h| | 1 |
| Steering movement excessively stiff with the weight on the lower bearing |2.2.1a| | 1 |
| Rear Direction indicator flashing more than 120 times per minute |1.5.1c| | 1 |
| Rear Rear reflector on motorcycle missing |1.4.1| | 1 |
| Nearside Rear Direction indicator flashing more than 120 times per minute |1.5.1c| | 1 |
| Nearside Rear Direction indicator damaged and function impaired |1.5.3a| | 1 |
| Offside Rear suspension bush has excessive free play |2.4.A2a|i|| | 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 |
| Front Roller brake test indicates a binding brake |3.3.A1a| | 1 |
| Rear Roller brake test indicates a binding brake |3.3.A1a| | 1 |
| Rear Brake pedal pivots excessively worn |3.1.3a| | 1 |
| Rear Brake pedal mounting insecure |3.1.2a| | 1 |
| Direction indicator not working |1.5.1c| | 1 |
| Rear Brake pedal is damaged and the brake cannot be readily applied |3.1.3c| | 1 |
| Stop lamp affected by the operation of another lamp |1.3.2| | 1 |
| Direction indicators affected by the operation of another lamp |1.5.1c| | 1 |
| Horn is not continous or uniform |1.7.3c| | 1 |
| Rear position lamp adversely affected by the operation of another lamp |1.1.3b| | 1 |
| Front position lamp adversely affected by the operation of another lamp |1.1.3b| | 1 |
| Front Brake lever pivots excessively worn |3.1.3a| | 1 |
| Front Steering headbearing has excessive wear or free play |2.2.2 |f| |i|| | 1 |
| All direction indicators missing |4.4.1 |a| |ii|| | 1 |
| Rear Brake servo defective or ineffective Rear servo not positioned correctly so piston bolt positioned on an angle. |1.1.10 |a| |i|| | 1 |
| Rear Rear reflector missing |4.8.2 |a| |ii|| | 1 |
| Rear Drive chain so loose it is likely to fail |6.1.7 |c| |ii|| | 1 |
| Rear Drive chain horseshoe locking device incorrectly fitted |6.1.7 |j| |i|| | 1 |
| Front Chain guard insecure Front sprocket cover missing. |6.1.7 |i|| | 1 |
| Front Brake lever has insufficient reserve travel |1.1.2 |a|| | 1 |
| Front Brake has no recorded effort at a wheel |1.2.1 |a| |ii|| | 1 |
| Roller brake test The less effective brake control does not achieve an efficiency of 25% |1.2.2 |a| |i|| | 1 |
| Nearside Rear Direction indicators not working |1.5.1c| | 1 |
| Lower Rear shock absorber insecurely mounted |2.4.A.3b| | 1 |
| Front Direction indicators affected by the operation of another lamp |1.5.1c| | 1 |
| Rear Rear wheel insecure |4.2.3b| | 1 |
| Floor brake test No brake control achieves an efficiency of 30%. |3.3.C1a| | 1 |
| Brake pedal has inadequate reserve travel |3.1.3b| | 1 |
| Brake pedal is damaged and the brake cannot be readily applied |3.1.3c| | 1 |
| Front suspension assembly component missing |2.3.1| | 1 |
| Rear suspension bearing excessively deteriorated |2.4A.2a|i|| | 1 |
| Rear reflector missing (4.8.2 (a) (ii)) | 1 |
| Offside Rear Direction indicator insecure |1.5.3b| | 1 |
| Rear position lamp damaged and function impaired |1.1.1b| | 1 |
| Rear Brake master cylinder insecurely mounted |3.2.B1a| | 1 |
| Front wheel bearings have excessive free play |2.3.5b| | 1 |
| Horn sounds harsh or grating |1.7.3c| | 1 |
| Rear Wheel alignment incorrect which adversely affects the steering |2.5.1| | 1 |
| Offside Locking devices not correctly fitted which may make the motor bicycle dangerous to ride |6.2.1h| | 1 |
| Fuel system component leaking |7.2.1a| | 1 |
| Rear Rear suspension bush has excessive free play |2.4.A2a|i|| | 1 |
| Nearside Steering lock stop ineffective |2.1.3| | 1 |
| Offside Rear Locking device|s| not correctly fitted which may make the motor bicycle dangerous to ride |6.2.1h| | 1 |
| Indicator switch defective |1.5.4| | 1 |
| Headlamp aim not tested |1.6| | 1 |
| Brake master cylinder insecurely mounted |3.2.B1a| | 1 |
| Front Drive chain sprocket worn to excess |6.2.1e| | 1 |
| Front shock absorber seal failed and leaking oil |2.3.3| | 1 |
| Rear wheel bearings are excessively rough |2.4.A.2c| | 1 |
| Headlamp aim headlamp deteriorated and function impaired |1.2.3a| | 1 |
| Rear position lamp insecure |1.1.1c| | 1 |
| Rear Brake disc|s| securing bolt|s| loose |3.2.A1g| | 1 |
| Rear Front mudguard insecure |2.3.7| | 1 |
| Centre Front Front wheel bearings have excessive free play |2.3.5b| | 1 |
| Rear Direction indicator not working |1.5.1c| | 1 |
| Clutch lever shortened so it cannot be readily operated. |6.2.1g| | 1 |
| Front Brake fluid reservoir fluid level dangerously low |3.2.B1d| | 1 |
| Front Brake lever is bent and the brake cannot be readily applied |3.1.3c| | 1 |
| Offside Front Front shock absorber seal failed and leaking oil |2.3.3| | 1 |
| Front Indicator switch does not operate the direction indicators on the side selected |1.5.4| | 1 |
| Rear Drive chain excessively loose |6.2.1d| | 1 |
| Nearside Front Steering lock stop ineffective |2.1.3| | 1 |