| Most common failures | No# failures |
|---|
| Headlamp aim out of alignment | 40 |
| Rear reflector on motorcycle missing |1.4.1| | 19 |
| Registration plate issues | 12 |
| Horn not working |1.7.3a| | 10 |
| Drive chain excessively loose |6.2.1d| | 10 |
| Rear position lamp does not illuminate immediately when it is switched on |1.1.3a| | 9 |
| Headlamp aim beam image kick up to the offside |1.6| | 7 |
| Front position lamp does not illuminate immediately when switched on |1.1.3a| | 7 |
| Drive chain worn to excess |6.2.1e| | 6 |
| Steering headbearing has excessive free play |2.2.2| | 6 |
| Front Roller brake test indicates a binding brake |3.3.A1a| | 5 |
| Exhaust is leaking and excessively noisey |7.1.1b| | 5 |
| Rear Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 5 |
| Rear Rear reflector on motorcycle missing |1.4.1| | 5 |
| Horn not loud enough to be heard by another road user |1.7.3a| | 5 |
| Front wheel bearings have excessive free play |2.3.5b| | 4 |
| Rear mono-shock pivot excessively worn |2.4.B.4| | 4 |
| Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 4 |
| Rear suspension bearing has excessive free play |2.4.A2a|i|| | 4 |
| Wheel alignment incorrect which adversely affects the handling |2.5.1| | 4 |
| Rear Roller brake test indicates a binding brake |3.3.A1a| | 3 |
| Rear suspension bush has excessive free play |2.4.A2a|i|| | 3 |
| Exhaust mounting does not fully support the exhaust system |7.1.1.c| | 3 |
| Front wheel bearings are excessively rough |2.3.5b| | 3 |
| Rear wheel bearings have excessive free play |2.4.A.2c| | 3 |
| Steering movement excessively `notchy` with the wheel raised |2.2.1b| | 3 |
| Nearside Handlebar handgrip not secure to handlebars. |2.1.1c| | 3 |
| Rear Drive chain excessively loose |6.2.1d| | 3 |
| Riders seat insecure |6.2.1a| | 3 |
| Front Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 3 |
| Rear Drive chain sprocket worn to excess |6.2.1e| | 3 |
| Front Floor brake test indicates a binding brake |3.3.C2c| | 3 |
| Rear suspension movement is excessively stiff |2.4.A.3b| | 3 |
| Headlamp dipped beam affected by the operation of another lamp |1.2.2c| | 3 |
| Clutch lever positioned so it cannot be readily operated. |6.2.1g| | 3 |
| Headlamp at least one does not illuminate on dipped beam |1.2.2a|i|| | 3 |
| Front Front wheel spindle securing nut locking device missing |2.3.3a| | 2 |
| Rear Front wheel spindle securing nut locking device missing |2.3.3a| | 2 |
| Floor brake test The less effective brake control does not achieve an efficiency of 25%. |3.3.C1b| | 2 |
| Rear Brake pedal has inadequate reserve travel |3.1.3b| | 2 |
| Drive chain sprocket worn to excess |6.2.1e| | 2 |
| Offside Rear Direction indicator insecure |1.5.3b| | 2 |
| Rear Direction indicator not working |1.5.1c| | 2 |
| Front Front position lamp does not illuminate immediately when switched on |1.1.3a| | 2 |
| Front Horn not working |1.7.3a| | 2 |
| Rear Drive chain sprocket carrier worn to excess |6.2.1e| | 2 |
| Direction indicators flashing less than 60 times a minute |1.5.1c| | 2 |
| Front Brake disc|s| excessively worn |3.2.A1l| | 2 |
| Roller brake test The less effective brake control does not achieve an efficiency of 25%. |3.3.A2b| | 2 |
| Throttle operating incorrectly |6.2.1f| | 2 |
| Offside Front shock absorber seal failed and leaking oil |2.3.3| | 2 |
| Front Brake component has restricted free movement and operation is likely to be impeded |3.2.A1h| | 2 |
| Headlamp main beam affected by the operation of another lamp |1.2.2c| | 2 |
| Rear Roller brake test indicates excessive fluctuation of brake effort |3.3.A1d| | 2 |
| Rear Wheel spoke excessively loose |4.2.1b| | 2 |
| Front Exhaust is leaking and excessively noisey |7.1.1b| | 2 |
| Nearside Front shock absorber seal failed and leaking oil |2.3.3| | 2 |
| Front Roller brake test indicates a severely grabbing brake |3.3.A1b| | 2 |
| Lower Rear mono-shock pivot excessively worn |2.4.B.4| | 2 |
| Front Steering headbearing has excessive free play |2.2.2| | 2 |
| Offside Handlebar handgrip not secure to handlebars. |2.1.1c| | 2 |
| Front Handlebar handgrip not secure to handlebars. |2.1.1c| | 2 |
| All direction indicators not working |4.4.1 |a| |ii|| | 2 |
| Front Headlamp aim beam image kick-up is to the offside |1.6.1| | 2 |
| Handlebar deformed |2.1.1b| | 2 |
| Rear Rear suspension bush has excessive free play |2.4.A2a|i|| | 2 |
| Front Front wheel bearings have excessive free play |2.3.5b| | 2 |
| Offside Rear Direction indicator not working |1.5.1c| | 2 |
| Horn not working (7.7 (a) (ii)) | 2 |
| Nearside Handlebar grip insecure to handlebar (2.2.1 (d) (ii)) | 2 |
| Direction indicators not working |1.5.1c| | 1 |
| Rear Floor brake test indicates a binding brake |3.3.C2c| | 1 |
| Steering control fouling between components which interferes with the free movement of the steering |2.1.2a| | 1 |
| Nearside Rear Direction indicator insecure |1.5.3b| | 1 |
| Offside Front Footrest insecure |6.2.1a| | 1 |
| Fuel system component leaking |7.2.1a| | 1 |
| Locking devices not correctly fitted which may make the motor bicycle dangerous to ride front wheel spindle |6.2.1h| | 1 |
| 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 |
| Fairings insecure and likely to impede the steering |2.1.2e| | 1 |
| Nearside Drive chain excessively loose |6.2.1d| | 1 |
| Front Headlamp aim beam image kick up to the offside |1.6| | 1 |
| Stop lamp remains on when the brake is released |1.3.1e| | 1 |
| Front Front wheel spindle securing nut locking device missing |2.3.5a| | 1 |
| Rear Exhaust markings indicating not for road use or similar wording |7.1.4| | 1 |
| Exhaust markings indicating not for road use or similar wording |7.1.4| | 1 |
| Brake pedal is positioned so that the brake cannot be readily applied |3.1.3c| | 1 |
| Nearside Rear Rear position lamp deteriorated and function impaired |1.1.1b| | 1 |
| Nearside Front Direction indicators not working |1.5.1c| | 1 |
| Offside Front Direction indicators not working |1.5.1c| | 1 |
| Front Brake caliper|s| insecure |3.2.A1j| | 1 |
| Headlamp aim headlamp deteriorated and function impaired |1.2.3a| | 1 |
| Direction indicator flashing less than 60 times a minute |1.5.1c| | 1 |
| Front Lower Steering headbearing has excessive free play |2.2.2| | 1 |
| Offside Front Lower Wheel spoke excessively loose |4.2.1b| | 1 |
| Rear Suspension component pin or bush excessively worn bottom shock mount |5.3.4 |a| |i|| | 1 |
| Nearside Fuel pipe leaking |7.2.1a| | 1 |
| Offside Rear Brake locking device missing |3.2.A1e| | 1 |
| Nearside Rear Locking device|s| not correctly fitted which may make the motor bicycle dangerous to ride |6.2.1h| | 1 |
| Offside Front Brake lever attachment screws missing lock nut missing |3.1.2b| | 1 |
| Offside Rear Brake component is fractured disc bolt fractured |3.1.5| | 1 |
| Rear Brake disc|s| insecure |3.2.A1g| | 1 |
| Rear Brake disc|s| excessively worn |3.2.A1l| | 1 |
| Front suspension has excessive stiffness in the suspension movement. |2.3.6b| | 1 |
| Nearside Rear Direction indicator not working |1.5.1c| | 1 |
| All position lamps do not illuminate immediately when switched on |1.1.3a| | 1 |
| Rear Brake component has restricted free movement and operation is likely to be impeded |3.2.A1h| | 1 |
| Rear Wheel has an excessively distorted bead rim. |4.2.2| | 1 |
| Horn missing |1.7.1| | 1 |
| Rear wheel spindle securing nut locking device missing |2.4.A.2b| | 1 |
| Rear shock absorber has inadequate damping effect. |2.4.A.3b| | 1 |
| Drive chain excessively tight |6.2.1d| | 1 |
| Nearside Footrest insecure |6.2.1a| | 1 |
| Nearside Rear Footrest insecure |6.2.12 |a|| | 1 |
| Nearside Headlamp insecure |1.2.3b| | 1 |
| Offside Headlamp insecure |1.2.3b| | 1 |
| Headlamp deteriorated and function impaired |1.2.3a| | 1 |
| Nearside Front Direction indicator not working |1.5.1c| | 1 |
| Direction indicators flashing more than 120 times per minute |1.5.1c| | 1 |
| Centre Rear Rear reflector on motorcycle missing |1.4.1| | 1 |
| Rear Rear position lamp does not illuminate immediately when it is switched on |1.1.3a| | 1 |
| Front Brake caliper|s| securing bolt|s| missing |3.2.A1j| | 1 |
| Rear suspension component loose |2.4.A.1a| | 1 |
| Offside Rear Exhaust mounting does not fully support the exhaust system |7.1.1.c| | 1 |
| Rear suspension bush has excessive free play all shocker linkage bushes |2.4.A2a|i|| | 1 |
| Front wheel spindle securing nut locking device missing |2.3.5a| | 1 |
| Front wheel spindle securing nut locking device insecure |2.3.5a| | 1 |
| Front Brake hose stretched by suspension movement incorrectly routed |3.2.B3b| | 1 |
| Front Brake lever is damaged and the brake cannot be readily applied |3.1.3c| | 1 |
| Brake pedal is damaged and the brake cannot be readily applied |3.1.3c| | 1 |
| Rear Brake fluid reservoir fluid level dangerously low |3.2.B1d| | 1 |
| Clutch lever shortened so it cannot be readily operated. |6.2.1g| | 1 |
| Rear wheel spindle securing nut locking device missing split pin |2.4.A.2b| | 1 |
| Front Brake lever cannot be applied smoothly |3.1.3d| | 1 |
| Rear Roller brake test indicates brake effort fall disproportional to brake lever or pedal effort |3.3.A1c| | 1 |
| Rear Wheel alignment incorrect which adversely affects the steering |2.5.1| | 1 |
| Nearside Indicator switch does not operate the direction indicators on the side selected |1.5.4| | 1 |
| Rear Hydraulic brake control feels spongy |3.1.4a| | 1 |
| Direction indicators affected by the operation of another lamp |1.5.1c| | 1 |
| Stop lamp affected by the operation of another lamp |1.3.2| | 1 |
| Horn control not readily accesible. |1.7.2a| | 1 |
| Front Wheel has an excessively eccentric bead rim. |4.2.2| | 1 |
| Front Wheel has an excessively distorted bead rim. |4.2.2| | 1 |
| Exhaust has part of the system missing |7.1.1a| | 1 |
| Steering movement excessively rough with the weight on the lower bearing |2.2.1a| | 1 |
| Steering movement excessively rough with the wheel raised |2.2.1b| | 1 |
| Rear Hydraulic brake control creeps under load. |3.1.4a| | 1 |
| Rear Rear wheel spindle securing nut locking device missing |2.4.A.2b| | 1 |
| Front Brake excessively binding |1.2.1 |f|| | 1 |
| Throttle operating incorrectly not returning correctly |6.2.1f| | 1 |
| Rear wheel bearings are excessively rough |2.4.A.2c| | 1 |
| Lower Rear suspension bearing has excessive free play |2.4.A2a|i|| | 1 |
| Rear Wheel spoke cracked. |4.2.1b| | 1 |
| Offside Front Direction indicator not working |1.5.1c| | 1 |
| Steering headbearing has excessive wear or free play |2.2.2 |f| |i|| | 1 |
| Rear Stop lamp remains on when the brake is released |1.3.1e| | 1 |
| Front Headlamp insecure |1.2.3b| | 1 |
| Rear Brake pedal pivots excessively worn |3.1.3a| | 1 |
| Front Front position lamp adversely affected by the operation of another lamp |1.1.3b| | 1 |
| Rear Brake disc|s| securing bolt|s| missing |3.2.A1g| | 1 |
| Locking devices not correctly fitted which may make the motor bicycle dangerous to ride |6.2.1h| | 1 |
| Rear wheel spindle securing nut|s| loose |2.4.A.2b| | 1 |
| Headlamp at least one does not illuminate on main beam |1.2.2a|ii|| | 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 |
| Front Direction indicator missing |1.5.1a| | 1 |
| Rear Direction indicator missing |1.5.1a| | 1 |
| Rear Wheel spoke missing |4.2.1b| | 1 |
| Front Stop lamp missing |1.3.3a| | 1 |
| Front Brake component defective due to a deliberate modification which significantly reduces the original strength |3.1.5| | 1 |
| Riders seat missing |6.2.1a| | 1 |
| Handlebar mounting excessively deteriorated |flexible type| |2.1.1d| | 1 |
| Front position lamp insecure |1.1.1c| | 1 |
| All position lamps adversely affected by the operation of another lamp |1.1.3b| | 1 |
| Front shock absorber seal failed and leaking oil |2.3.3| | 1 |
| Rear Roller brake test indicates brake effort rise disproportional to brake lever or pedal effort |3.3.A1c| | 1 |
| Front Front wheel spindle securing nut locking device insecure |2.3.5a| | 1 |
| Rear Wheel alignment incorrect which adversely affects the handling |2.5.1| | 1 |
| Front Direction indicators not working |1.5.1c| | 1 |
| Rear Direction indicators not working |1.5.1c| | 1 |
| Lower Rear suspension bush has excessive free play |2.4.A2a|i|| | 1 |
| Headlamp switch faulty |1.2.4| | 1 |
| Position lamp switch faulty |1.1.4a| | 1 |
| Front Brake disc|s| cracked |3.2.A1g| | 1 |
| Front Brake lever has inadequate reserve travel |3.1.3b| | 1 |
| Front Brake lever is positioned so that the brake cannot be readily applied |3.1.3c| | 1 |
| Front Wheel spoke excessively loose |4.2.1b| | 1 |
| Locking device|s| not correctly fitted which may make the motor bicycle dangerous to ride |6.2.1h| | 1 |
| Offside Direction indicator not working |1.5.1c| | 1 |
| Nearside Rear Footrest missing |6.2.1a| | 1 |
| Offside Rear Footrest missing |6.2.1a| | 1 |
| Rear Wheel corroded significantly reducing the original strength |4.2.1a| | 1 |
| Front Stop lamp does not illuminate immediately a brake applies brake |1.3.1a| | 1 |
| Rear reflector missing |4.8.2 |a| |ii|| | 1 |
| Nearside Rear Direction indicator not working (1.5.1c) | 1 |
| Rear Rear position lamp does not illuminate immediately when it is switched on (1.1.3a) | 1 |
| Nearside Rear Direction indicators not working (1.5.1c) | 1 |
| Rear Stop lamp does not illuminate immediately a brake applies (1.3.1a) | 1 |
| Centre Brake hose fouling (3.2.B3b) | 1 |
| Offside Front Footrest insecure (6.2.1a) | 1 |
| Nearside Steering control fouling between components which interferes with the free movement of the steering (2.1.2a) | 1 |
| Front Headlamp insecure (1.2.3b) | 1 |
| Front Brake hose is likely to be fouled or trapped by moving parts (3.2.B2c) | 1 |
| Rear shock absorber has inadequate damping effect. (2.4.A.3b) | 1 |
| Rear Roller brake test indicates brake effort fall disproportional to brake lever or pedal effort (3.3.A1c) | 1 |
| Front position lamp does not illuminate immediately when switched on (1.1.3a) | 1 |
| Rear Lower Suspension component pin or bush excessively worn (5.3.4 (a) (i)) | 1 |
| Headlamp aim so that beam "kick up" is not visible on the screen (4.1.2 (a)) | 1 |
| Rear Suspension component pin or bush excessively worn lower shock mount has play (5.3.4 (a) (i)) | 1 |
| Rear All position lamps not working (4.2.1 (a)) | 1 |
| Rear reflector missing (4.8.2 (a) (ii)) | 1 |
| Rear Suspension arm pin or bush excessively worn arm link to shock (5.3.4 (a) (i)) | 1 |
| Rear Brake excessively binding (1.2.1 (f)) | 1 |
| Front Throttle operating incorrectly does not return closed properly (6.2.7 (a) (i)) | 1 |
| Steering headbearing excessively stiff or notchy (2.2.2 (f) (i)) | 1 |
| Rear Suspension component pin or bush excessively worn (5.3.4 (a) (i)) | 1 |
| Rear Wheel spindle locking device missing (5.2.1 (d)) | 1 |