| Most common failures | No# failures |
|---|
| Headlamp aim out of alignment | 18 |
| Rear reflector on motorcycle missing |1.4.1| | 7 |
| Rear Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 5 |
| Drive chain excessively loose |6.2.1d| | 5 |
| Front Steering headbearing has excessive free play |2.2.2| | 5 |
| Steering movement excessively `notchy` with the weight on the lower bearing |2.2.1a| | 4 |
| Steering movement excessively `notchy` with the wheel raised |2.2.1b| | 4 |
| Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 4 |
| Locking device|s| not correctly fitted which may make the motor bicycle dangerous to ride |6.2.1h| | 3 |
| Rear Roller brake test indicates excessive fluctuation of brake effort |3.3.A1d| | 3 |
| Rear wheel bearings have excessive free play |2.4.A.2c| | 3 |
| Exhaust is leaking and excessively noisey |7.1.1b| | 3 |
| Nearside Footrest insecure |6.2.1a| | 3 |
| Roller brake test The less effective brake control does not achieve an efficiency of 25%. |3.3.A2b| | 3 |
| Steering headbearing has excessive free play |2.2.2| | 3 |
| Front position lamp does not illuminate immediately when switched on |1.1.3a| | 3 |
| Rear wheel spindle securing nut locking device missing |2.4.A.2b| | 3 |
| Rear mono-shock pivot excessively worn |2.4.B.4| | 2 |
| Headlamp dipped beam affected by the operation of another lamp |1.2.2c| | 2 |
| Rear position lamp adversely affected by the operation of another lamp |1.1.3b| | 2 |
| Rear Rear reflector on motorcycle missing |1.4.1| | 2 |
| Direction indicators not working |1.5.1c| | 2 |
| Locking devices not correctly fitted which may make the motor bicycle dangerous to ride |6.2.1h| | 2 |
| Rear suspension bush has excessive free play |2.4.A2a|i|| | 2 |
| Offside Rear Footrest missing |6.2.1a| | 2 |
| Rear suspension movement is excessively stiff |2.4.A.3b| | 2 |
| Fuel system component leaking |7.2.1a| | 2 |
| Headlamp insecure |1.2.3b| | 2 |
| Nearside Rear Direction indicator not working |1.5.1c| | 2 |
| Front Roller brake test indicates a binding brake |3.3.A1a| | 2 |
| Rear Roller brake test indicates brake effort rise disproportional to brake lever or pedal effort |3.3.A1c| | 2 |
| Rear position lamp does not illuminate immediately when it is switched on |1.1.3a| | 2 |
| Horn not working |1.7.3a| | 2 |
| Fairings insecure and likely to impede the steering |2.1.2e| | 2 |
| Front wheel spindle securing nut locking device missing |2.3.5a| | 2 |
| Rear Brake pedal has inadequate reserve travel |3.1.3b| | 2 |
| Front Brake disc|s| excessively worn |3.2.A1l| | 2 |
| Rear Brake reaction bracket insecure |3.2.A1j| | 2 |
| Offside Front Footrest insecure |6.2.1a| | 2 |
| Rear Footrest missing |6.2.1a| | 2 |
| Rear Drive chain sprocket worn to excess |6.2.1e| | 2 |
| Brake pedal pivots excessively worn |3.1.3a| | 1 |
| Headlamp main beam affected by the operation of another lamp |1.2.2c| | 1 |
| Rear Rear position lamp damaged and function impaired |1.1.1b| | 1 |
| Rear Rear position lamp does not illuminate immediately when it is switched on |1.1.3a| | 1 |
| Rear mono-shock pivot seized |2.4.B.4| | 1 |
| Steering movement excessively stiff with the weight on the lower bearing |2.2.1a| | 1 |
| Front Brake hose fouling |3.2.B3b| | 1 |
| Steering movement excessively rough with the wheel raised |2.2.1b| | 1 |
| Brake lever is so short and the brake cannot be readily applied |3.1.3c| | 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 |
| Steering control fouling between components which interferes with the free movement of the steering |2.1.2a| | 1 |
| Front suspension has inadequate damping effect. |2.3.6c| | 1 |
| Brake locking device missing |3.2.A1e| | 1 |
| Front Brake caliper|s| securing bolt|s| missing |3.2.A1j| | 1 |
| Front Brake caliper|s| securing bolt|s| loose |3.2.A1j| | 1 |
| Front Brake caliper|s| insecure |3.2.A1j| | 1 |
| Offside Front Brake lever has insufficient reserve travel |1.1.2 |a|| | 1 |
| Nearside Rear Footrest missing |6.2.12 |a|| | 1 |
| Offside Rear Footrest missing |6.2.12 |a|| | 1 |
| Central Rear Shock absorber has negligible damping effect no movement in shock |5.3.2 |b|| | 1 |
| Front All position lamps do not illuminate immediately when switched on |1.1.3a| | 1 |
| Rear Roller brake test indicates a binding brake |3.3.A1a| | 1 |
| Offside Front Brake lever is damaged and the brake cannot be readily applied |3.1.3c| | 1 |
| Offside Front Handlebar handgrip not secure to handlebars. |2.1.1c| | 1 |
| Front Front shock absorber seal failed and leaking oil |2.3.3| | 1 |
| Nearside Drive chain excessively loose |6.2.1d| | 1 |
| Horn not loud enough to be heard by another road user |1.7.3a| | 1 |
| Offside Front Front shock absorber seal failed and leaking oil |2.3.3| | 1 |
| Offside Rear Drive chain sprocket worn to excess |6.2.1e| | 1 |
| Offside Rear Drive chain worn to excess |6.2.1e| | 1 |
| Nearside Rear Brake pedal has inadequate reserve travel |3.1.3b| | 1 |
| Nearside Rear Brake pedal is damaged and the brake cannot be readily applied |3.1.3c| | 1 |
| Nearside Rear Locking devices not correctly fitted which may make the motor bicycle dangerous to ride |6.2.1h| | 1 |
| Front Stop lamp remains on when the brake is released |1.3.1e| | 1 |
| Headlamp dipped beam flickers when tapped lightly by hand |1.2.2c| | 1 |
| Headlamp main beam flickers when tapped lightly by hand |1.2.2c| | 1 |
| Rear position lamp deteriorated and function impaired |1.1.1b| | 1 |
| Rear wheel spindle securing nut locking device insecure |2.4.A.2b| | 1 |
| Offside Front Direction indicator not working |1.5.1c| | 1 |
| Direction indicator not working |1.5.1c| | 1 |
| Headlamp at least one does not illuminate on dipped beam |1.2.2a|i|| | 1 |
| Front Hydraulic brake control feels spongy |3.1.4a| | 1 |
| Offside Rear Direction indicator not working |1.5.1c| | 1 |
| Registration plate issues | 1 |
| Front wheel bearings have excessive free play |2.3.5b| | 1 |
| Rear Rear suspension movement is excessively stiff |2.4.A.3b| | 1 |
| Nearside Rear Drive chain excessively loose |6.2.1d| | 1 |
| Offside Front Direction indicator not working |4.4.1 |a| |ii|| | 1 |
| Front Position lamp not working |4.2.1 |a|| | 1 |
| Nearside Handlebar grip insecure to handlebar loose to bar |2.2.1 |d| |ii|| | 1 |
| Riders seat insecure rear bolt securing nut missing |6.2.5 |a| |ii|| | 1 |
| Rear reflector missing |4.8.2 |a| |ii|| | 1 |
| Headlamp light intensity severely reduced reduced output on throttle and interaction with brake/indicators |4.1.4 |a|| | 1 |
| All position lamps light intensity significantly reduced |4.2.3 |a| |ii|| | 1 |
| Wheel alignment incorrect which adversely affects the steering front wheel off centre |2.4 |a|| | 1 |
| Steering operation fouling on the fuel tank or bodywork on full lock |2.1.4 |b|| | 1 |
| Steering operation restricted in free movement from lock to lock head stock bearing notchy |2.1.4 |c|| | 1 |
| Shock absorber has negligible damping effect front |5.3.2 |b|| | 1 |
| Rear Lower Shock absorber has an excessively worn bush shock mounting worn |5.3.2 |c|| | 1 |
| Front Brake hose leaking joins to caliper and master cylinder leaking |1.1.12 |c|| | 1 |
| Rear Brake lever has restricted free movement foot rest interfering with rear brake |1.1.15 |e|| | 1 |
| Wheel spindle or securing nut|s| so insecure that wheel security or steering control is adversely affected both front and rear wheel spindle castle nuts missing locking device |5.2.1 |c| |ii|| | 1 |
| Fuel system component leaking |6.1.3 |b| |i|| | 1 |
| Drive chain excessively tight, so that it is likely to fail |6.1.7 |k| |ii|| | 1 |
| Fuel cap ineffective split seal |6.1.3 |b| |i|| | 1 |
| Brake hose excessively deteriorated | 1 |
| Direction indicators flashing less than 60 times a minute |1.5.1c| | 1 |
| Front mudguard insecure |2.3.7| | 1 |
| Front Brake disc|s| excessively scored |3.2.A1l| | 1 |
| Rear Brake reaction bracket securing bolt|s| missing |3.2.A1j| | 1 |
| Rear Floor brake test indicates a binding brake |3.3.C2c| | 1 |
| Front Floor brake test indicates a severely juddering brake |3.3C2d.| | 1 |
| Nearside Handlebar handgrip not secure to handlebars. |2.1.1c| | 1 |
| Nearside Front Footrest insecure |6.2.1a| | 1 |
| Nearside Rear Footrest missing |6.2.1a| | 1 |
| Front Steering movement excessively `notchy` with the weight on the lower bearing |2.2.1a| | 1 |
| Rear Rear reflector on motorcycle obscured |1.4.1| | 1 |
| Motorcycle structure joining/attachment plate or fastening insecure front wheel spindle nut |6.1.1 |b| |i|| | 1 |
| Roller brake test indicates brake effort rise disproportional to brake lever or pedal effort |3.3.A1c| | 1 |
| Nearside Front Direction indicator missing |1.5.1a| | 1 |
| Offside 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 |
| Front Direction indicator not working |1.5.1c| | 1 |
| Front Brake lever is so short and the brake cannot be readily applied |3.1.3c| | 1 |
| Front Gradient brake test indicates a sticking brake |3.3.D1c| | 1 |
| Plate brake test The less effective brake control does not achieve an efficiency of 25%. |3.3.B2b| | 1 |
| Front wheel spindle securing nut locking device missing |2.3.3a| | 1 |
| Drive chain worn to excess |6.2.1e| | 1 |
| Front Roller brake test indicates excessive fluctuation of brake effort |3.3.A1d| | 1 |
| Front Horn not loud enough to be heard by another road user |1.7.3a| | 1 |
| Front Front position lamp does not illuminate immediately when switched on |1.1.3a| | 1 |
| Rear Brake lining|s| less than 1.5 mm thick |3.2.A1f|i|| | 1 |
| Front Brake lever is bent and the brake cannot be readily applied |3.1.3c| | 1 |
| Brake pedal has inadequate reserve travel |3.1.3b| | 1 |
| Indicator switch defective |1.5.4| | 1 |
| Front Steering lock stop ineffective |2.1.3| | 1 |
| Rear Rear wheel bearings have excessive free play |2.4.A.2c| | 1 |
| Front Brake component has restricted free movement and operation is likely to be impeded |3.2.A1h| | 1 |
| Rear Brake component has restricted free movement and operation is likely to be impeded |3.2.A1h| | 1 |
| Front Headlamp at least one does not illuminate on dipped beam |1.2.2a|i|| | 1 |
| Nearside Handlebar deformed |2.1.1b| | 1 |
| Direction indicators affected by the operation of another lamp |1.5.1c| | 1 |
| Offside Front Front position lamp damaged and function impaired (1.1.1b) | 1 |
| Front Stop lamp does not illuminate immediately a brake applies (1.3.1a) | 1 |
| Front Horn not working (1.7.3a) | 1 |
| Rear Position lamp not working (4.2.1 (a)) | 1 |
| Nearside Handlebar grip insecure to handlebar (2.2.1 (d) (ii)) | 1 |
| Rear Shock absorber has an excessively worn bush (5.3.2 (c)) | 1 |
| Stop lamp not working with rear lever (4.3.1 (a) (ii)) | 1 |