| Most common failures | No# failures |
|---|
| Headlamp aim out of alignment | 33 |
| Rear reflector on motorcycle missing |1.4.1| | 22 |
| Rear Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 18 |
| Drive chain excessively loose |6.2.1d| | 13 |
| Rear shock absorber has inadequate damping effect. |2.4.A.3b| | 11 |
| Nearside Front shock absorber seal failed and leaking oil |2.3.3| | 11 |
| Front Front shock absorber seal failed and leaking oil |2.3.3| | 7 |
| Rear Rear shock absorber has inadequate damping effect. |2.4.A.3b| | 7 |
| Front shock absorber seal failed and leaking oil |2.3.3| | 7 |
| Offside Front shock absorber seal failed and leaking oil |2.3.3| | 7 |
| Offside Rear Footrest missing |6.2.1a| | 7 |
| Rear Rear reflector on motorcycle missing |1.4.1| | 6 |
| Steering headbearing has excessive free play |2.2.2| | 6 |
| Rear wheel bearings have excessive free play |2.4.A.2c| | 6 |
| Front Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 6 |
| Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 5 |
| Headlamp at least one does not illuminate on dipped beam |1.2.2a|i|| | 5 |
| Rear Rear wheel bearings have excessive free play |2.4.A.2c| | 5 |
| Front Roller brake test indicates a binding brake |3.3.A1a| | 5 |
| Front Brake lever cannot be applied smoothly |3.1.3d| | 5 |
| Front wheel bearings are excessively rough |2.3.5b| | 5 |
| Nearside Rear Footrest missing |6.2.1a| | 5 |
| Registration plate issues | 5 |
| Headlamp insecure |1.2.3b| | 4 |
| Rear position lamp does not illuminate immediately when it is switched on |1.1.3a| | 4 |
| Rear Drive chain excessively loose |6.2.1d| | 4 |
| Front Steering headbearing has excessive free play |2.2.2| | 4 |
| Offside Front Footrest insecure |6.2.1a| | 4 |
| Front Brake disc|s| friction surface contaminated by oil or grease |3.2.A1k| | 4 |
| Drive chain excessively tight |6.2.1d| | 4 |
| Rear Rear suspension bush has excessive free play |2.4.A2a|i|| | 4 |
| Steering movement excessively `notchy` with the wheel raised |2.2.1b| | 4 |
| Throttle operating incorrectly |6.2.1f| | 4 |
| Front suspension has inadequate damping effect. |2.3.6c| | 4 |
| Roller brake test The less effective brake control does not achieve an efficiency of 25%. |3.3.A2b| | 4 |
| Locking device|s| not correctly fitted which may make the motor bicycle dangerous to ride |6.2.1h| | 4 |
| Steering control handlebar movement restricted by trapped cables |2.1.2c| | 3 |
| Front Brake disc|s| excessively worn |3.2.A1l| | 3 |
| Nearside Handlebar handgrip not secure to handlebars. |2.1.1c| | 3 |
| 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| | 3 |
| Rear suspension bush has excessive free play |2.4.A2a|i|| | 3 |
| Front Brake hose is likely to be fouled or trapped by moving parts |3.2.B2c| | 3 |
| Offside Front Direction indicator not working |1.5.1c| | 3 |
| Drive chain worn to excess |6.2.1e| | 3 |
| Offside Front Front shock absorber seal failed and leaking oil |2.3.3| | 3 |
| Rear Locking device|s| not correctly fitted which may make the motor bicycle dangerous to ride |6.2.1h| | 3 |
| Indicator switch insecure |1.5.4| | 3 |
| Front Brake master cylinder leaking hydraulic fluid |3.2.B1e| | 2 |
| Rear Drive chain sprocket worn to excess |6.2.1e| | 2 |
| Front Brake disc|s| insecure |3.2.A1g| | 2 |
| Horn not working |1.7.3a| | 2 |
| Nearside Rear Direction indicator damaged and function impaired |1.5.3a| | 2 |
| Roller brake test No brake control achieves an efficiency of 30%. |3.3.A2a| | 2 |
| Rear Footrest insecure |6.2.1a| | 2 |
| Rear Brake disc|s| excessively worn |3.2.A1l| | 2 |
| Rear mono-shock pivot excessively worn |2.4.B.4| | 2 |
| Offside Front Direction indicator insecure |1.5.3b| | 2 |
| Rear shock absorber seal failed and leaking oil |2.4.A.1c| | 2 |
| Rear Rear suspension bearing has excessive free play |2.4.A2a|i|| | 2 |
| Rear suspension bearing has excessive free play |2.4.A2a|i|| | 2 |
| Rear suspension movement is excessively stiff |2.4.A.3b| | 2 |
| Front Front suspension has inadequate damping effect. |2.3.6c| | 2 |
| Front Roller brake test indicates a severely grabbing brake |3.3.A1b| | 2 |
| Front Front mudguard insecure |2.3.7| | 2 |
| Brake lever cannot be applied smoothly |3.1.3d| | 2 |
| Front Brake lever has inadequate reserve travel |3.1.3b| | 2 |
| Rear Footrest missing |6.2.1a| | 2 |
| Front Fairings insecure and likely to impede the steering |2.1.2e| | 2 |
| Wheel alignment incorrect which adversely affects the handling |2.5.1| | 2 |
| Front Wheel has an excessively distorted bead rim. |4.2.2| | 2 |
| Rear wheel rotation likely to be impeded |6.2.1b| | 2 |
| Horn not loud enough to be heard by another road user |1.7.3a| | 2 |
| Wheel alignment incorrect which adversely affects the steering |2.5.1| | 2 |
| Nearside Front Front shock absorber seal failed and leaking oil |2.3.3| | 2 |
| Front Hydraulic brake control feels spongy |3.1.4a| | 2 |
| Front Headlamp switch faulty |1.2.4| | 1 |
| Front Steering movement excessively `notchy` with the weight on the lower bearing |2.2.1a| | 1 |
| Direction indicators not working |1.5.1c| | 1 |
| Front Headlamp aim beam image kick up to the offside |1.6| | 1 |
| Centre Rear shock absorber has inadequate damping effect. |2.4.A.3b| | 1 |
| Rear Direction indicator flashing more than 120 times per minute |1.5.1c| | 1 |
| Rear Wheel alignment incorrect which adversely affects the handling |2.5.1| | 1 |
| Front Headlamp insecure |1.2.3b| | 1 |
| Upper Steering headbearing has excessive free play |2.2.2| | 1 |
| Direction indicator insecure |1.5.3b| | 1 |
| Nearside Direction indicator affected by the operation of another lamp |1.5.1c| | 1 |
| Offside Direction indicator affected by the operation of another lamp |1.5.1c| | 1 |
| Horn is not a constant note |1.7.3c| | 1 |
| Rear position lamp adversely affected by the operation of the horn |1.1.3b| | 1 |
| Front Headlamp at least one does not illuminate on dipped beam |1.2.2a|i|| | 1 |
| Rear Headlamp at least one does not illuminate on main beam |1.2.2a|ii|| | 1 |
| Clutch lever shortened so it cannot be readily operated. |6.2.1g| | 1 |
| Nearside Front Direction indicator damaged and function impaired |1.5.3a| | 1 |
| Rear Stop lamp remains on when the brake is released |1.3.1e| | 1 |
| Rear Brake disc|s| excessively scored |3.2.A1l| | 1 |
| Front Steering movement excessively stiff with the weight on the lower bearing |2.2.1a| | 1 |
| Front Steering movement excessively stiff with the wheel raised |2.2.1b| | 1 |
| Offside Rear Exhaust is leaking and excessively noisey |7.1.1b| | 1 |
| Rear Exhaust excessively deteriorated |7.1.1a| | 1 |
| Front Stop lamp remains on when the brake is released |1.3.1e| | 1 |
| Front position lamp incorrect colour |1.1.2a| | 1 |
| Offside Footrest missing |6.2.1a| | 1 |
| Front An item not tested |Manual| | 1 |
| Rear Brake pedal has inadequate reserve travel |3.1.3b| | 1 |
| Nearside Rear Direction indicators not working |1.5.1c| | 1 |
| Roller brake test Neither brake control achieves an efficiency of 25% |3.3.A2b| | 1 |
| Offside Front Upper Front shock absorber seal failed and leaking oil |2.3.3| | 1 |
| Brake lever has inadequate reserve travel |3.1.3b| | 1 |
| Rear Wheel has an excessively distorted bead rim. |4.2.2| | 1 |
| Brake fluid reservoir leaking hydraulic fluid |3.2.B1e| | 1 |
| Exhaust excessively deteriorated |7.1.1a| | 1 |
| Rear Roller brake test indicates a sticking brake |3.3.A1a| | 1 |
| Rear Lower Rear suspension bush has excessive free play |2.4.A2a|i|| | 1 |
| Nearside Front Headlamp at least one does not illuminate on dipped beam |1.2.2a|i|| | 1 |
| Offside Front Handlebar handgrip not secure to handlebars. |2.1.1c| | 1 |
| Hydraulic brake control creeps under load. |3.1.4a| | 1 |
| Hydraulic brake control feels spongy |3.1.4a| | 1 |
| Steering control fouling between components which interferes with the free movement of the steering |2.1.2a| | 1 |
| Front Front position lamp does not illuminate immediately when switched on |1.1.3a| | 1 |
| Nearside Front Direction indicators not working |1.5.1c| | 1 |
| Headlamp aim headlamp damaged and function impaired |1.2.3a| | 1 |
| Drive chain sprocket carrier worn to excess |6.2.1e| | 1 |
| Drive chain fouling another component |6.2.1d| | 1 |
| Throttle has a significant change in engine speed whilst moving the steering from lock to lock |2.1.4| | 1 |
| Fuel pipe leaking |7.2.1a| | 1 |
| Dipswitch does not deflect the main beam/s, making them into dipped beam/s |1.2.2b|ii|| | 1 |
| Rear Brake pedal pivots excessively worn |3.1.3a| | 1 |
| Rear Brake pedal cannot be applied smoothly |3.1.3d| | 1 |
| Front Roller brake test indicates a sticking brake |3.3.A1a| | 1 |
| Front Front mudguard can easily contact any fixed point of the motor bicycle. |2.3.7| | 1 |
| Rear Brake lever has inadequate reserve travel |3.1.3b| | 1 |
| Upper Rear suspension bearing has excessive free play |2.4.A2a|i|| | 1 |
| Front Headlamp aim headlamp deteriorated and function impaired |1.2.3a| | 1 |
| Nearside Front Brake lever is bent and the brake cannot be readily applied |3.1.3c| | 1 |
| Nearside Direction indicator not working |1.5.1c| | 1 |
| Rear Drive chain worn to excess |6.2.1e| | 1 |
| Rear Rear position lamp does not illuminate immediately when it is switched on |1.1.3a| | 1 |
| Front Horn not working |1.7.3a| | 1 |
| Front Front position lamp damaged and function impaired |1.1.1b| | 1 |
| Rear Rear position lamp insecure |1.1.1c| | 1 |
| Front Rear position lamp insecure |1.1.1c| | 1 |
| Front Brake disc|s| securing bolt|s| missing |3.2.A1g| | 1 |
| Offside Front Position lamp switch insecure |1.1.4b| | 1 |
| Front Front position lamp deteriorated and function impaired |1.1.1b| | 1 |
| Horn missing |1.7.1| | 1 |
| Direction indicators flashing more than 120 times per minute |1.5.1c| | 1 |
| Centre Exhaust mounting missing |7.1.1c| | 1 |
| Offside Front Motorcycle structure excessively damaged |6.1.1a| | 1 |
| Front Front wheel spindle loose |2.3.5a| | 1 |
| Offside Front Footrest missing |6.2.1a| | 1 |
| Nearside Rear Built up wheel has a loose bolt/s |4.2.1c| | 1 |
| Offside Direction indicator flashing more than 120 times per minute |1.5.1c| | 1 |
| Chain guard fouling another component |6.2.1c| | 1 |
| Nearside Rear Locking device|s| not correctly fitted which may make the motor bicycle dangerous to ride |6.2.1h| | 1 |
| Offside Rear Brake pedal insecure |3.1.2a| | 1 |
| Offside Rear Brake pedal is damaged and the brake cannot be readily applied |3.1.3c| | 1 |
| Centre Rear Rear suspension bush has excessive free play |2.4.A2a|i|| | 1 |
| Headlamp at least one does not illuminate on main beam |1.2.2a|ii|| | 1 |
| Headlamp aim not tested |1.6| | 1 |
| Rear wheel has a loose wheel nut|s| |4.2.3a| | 1 |
| Rear Brake pedal is inoperative |3.1.3c| | 1 |
| Rear Exhaust mounting missing |7.1.1c| | 1 |
| Rear Drive chain excessively tight |6.2.1d| | 1 |
| Steering movement excessively stiff with the wheel raised |2.2.1b| | 1 |
| Offside Front suspension assembly component cracked |2.3.1| | 1 |
| Nearside Direction indicator flashing more than 120 times per minute |1.5.1c| | 1 |
| Offside Rear Direction indicator flashing less than 60 times a minute |1.5.1c| | 1 |
| Front mudguard insecure |2.3.7| | 1 |
| Rear Rear shock absorber seal failed and leaking oil |2.4.A.1c| | 1 |
| Rear wheel spindle securing nut locking device missing split pin |2.4.A.2b| | 1 |
| Offside Front Throttle operating incorrectly |6.2.1f| | 1 |
| Offside Handlebar mounting clamp bolt loose |2.1.1a| | 1 |
| Rear position lamp insecure |1.1.1c| | 1 |
| Rear Direction indicator insecure |1.5.3b| | 1 |
| Headlamp dipped beam affected by the operation of another lamp |1.2.2c| | 1 |
| Headlamp main beam affected by the operation of another lamp |1.2.2c| | 1 |
| Motorcycle structure insecure and likely to affect the correct functioning of the steering or braking |6.1.1c| | 1 |
| Nearside Front Direction indicator not working |1.5.1c| | 1 |
| Nearside Rear Direction indicator not working |1.5.1c| | 1 |
| Nearside Clutch lever bent so it cannot be readily operated. |6.2.1g| | 1 |
| Nearside Front Handlebar handgrip not secure to handlebars. |2.1.1c| | 1 |
| Front Brake disc|s| has excessive run out |3.2.A1m| | 1 |
| Position lamp switch insecure |1.1.4b| | 1 |
| Front Brake component has restricted free movement and operation is likely to be impeded |3.2.A1h| | 1 |
| Rear reflector on motorcycle incorrectly positioned |1.4.2d| | 1 |
| Lower Rear suspension bush has excessive free play |2.4.A2a|i|| | 1 |
| Nearside Fairings insecure and likely to impede the steering |2.1.2e| | 1 |
| Offside Fairings insecure and likely to impede the steering |2.1.2e| | 1 |
| Offside Rear Direction indicators not working |1.5.1c| | 1 |
| Floor brake test No brake control achieves an efficiency of 30%. |3.3.C1a| | 1 |
| Front Floor brake test The less effective brake control does not achieve an efficiency of 25%. |3.3.C1b| | 1 |
| Rear Brake caliper|s| securing bolt|s| loose |3.2.A1j| | 1 |
| Rear suspension component seized |2.4A2a|ii|| | 1 |
| Rear mono-shock pivot seized |2.4.B.4| | 1 |
| Brake lever insecure |3.1.2a| | 1 |
| Offside Footrest insecure |6.2.1a| | 1 |
| Offside Handlebar handgrip not secure to handlebars. |2.1.1c| | 1 |
| Rear reflector on motorcycle obscured |1.4.1| | 1 |
| Offside Front Front suspension assembly component missing |2.3.1| | 1 |
| Front suspension assembly component missing |2.3.1| | 1 |
| Front Hydraulic brake control creeps under load. |3.1.4a| | 1 |
| Exhaust mounting missing |7.1.1c| | 1 |
| Headlamp aim headlamp deteriorated and function impaired |1.2.3a| | 1 |
| Centre Rear position lamp does not illuminate immediately when it is switched on |1.1.3a| | 1 |
| Offside Rear Direction indicator damaged and function impaired |1.5.3a| | 1 |
| Nearside Front Upper Handlebar handgrip not secure to handlebars. |2.1.1c| | 1 |
| Centre Front Steering control handlebar movement restricted by cables caught on a projection |2.1.2c| | 1 |
| Centre Front Steering movement excessively `notchy` with the weight on the lower bearing |2.2.1a| | 1 |
| Centre Rear wheel bearings have excessive free play |2.4.A.2c| | 1 |
| Centre Rear suspension movement is excessively stiff |2.4.A.3b| | 1 |
| Centre Front Roller brake test indicates a sticking brake |3.3.A1a| | 1 |
| Nearside Rear Direction indicator not working (4.4.1 (a) (ii)) | 1 |
| Nearside Rear Footrest missing (6.2.12 (a)) | 1 |
| Offside Rear Footrest missing (6.2.12 (a)) | 1 |
| Rear Drive chain sprocket excessively loose (6.1.7 (c) (i)) | 1 |
| Offside Rear Brake linkage has abnormal movement of levers indicating excessive wear or maladjustment brake rod (1.1.15 (f)) | 1 |
| Rear Shock absorber has negligible damping effect (5.3.2 (b)) | 1 |
| Front Shock absorber has negligible damping effect (5.3.2 (b)) | 1 |
| Headlamp not working on dipped beam (4.1.1 (a) (ii)) | 1 |
| Drive chain excessively tight (6.1.7 (k) (i)) | 1 |
| Rear reflector missing (4.8.2 (a) (ii)) | 1 |
| Central Rear Rear reflector missing (4.8.2 (a) (ii)) | 1 |
| Rear Rear reflector missing (4.8.2 (a) (ii)) | 1 |
| Rear Stop lamp not working Not working when front brake applied (4.3.1 (a) (ii)) | 1 |
| Stop lamp not working from front brake (4.3.1 (a) (ii)) | 1 |