| Most common failures | No# failures |
|---|
| Headlamp aim out of alignment | 20 |
| Rear reflector on motorcycle missing |1.4.1| | 15 |
| Registration plate issues | 8 |
| Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 8 |
| Rear position lamp does not illuminate immediately when it is switched on |1.1.3a| | 7 |
| Horn not working |1.7.3a| | 6 |
| Front Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 6 |
| Steering headbearing has excessive free play |2.2.2| | 5 |
| Wheel alignment incorrect which adversely affects the handling |2.5.1| | 5 |
| Drive chain worn to excess |6.2.1e| | 4 |
| Rear Rear reflector on motorcycle missing |1.4.1| | 4 |
| Rear suspension movement is excessively stiff |2.4.A.3b| | 3 |
| Locking devices not correctly fitted which may make the motor bicycle dangerous to ride |6.2.1h| | 3 |
| Drive chain excessively loose |6.2.1d| | 3 |
| Rear Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 3 |
| Direction indicators not working |1.5.1c| | 3 |
| Front Brake lever has inadequate reserve travel |3.1.3b| | 3 |
| Horn not loud enough to be heard by another road user |1.7.3a| | 3 |
| Rear reflector missing (4.8.2 (a) (ii)) | 3 |
| Headlamp at least one does not illuminate on dipped beam |1.2.2a|i|| | 3 |
| Front Brake disc|s| excessively worn |3.2.A1l| | 3 |
| Rear Brake disc|s| excessively worn |3.2.A1l| | 3 |
| Rear Roller brake test indicates a binding brake |3.3.A1a| | 3 |
| Rear wheel spindle securing nut locking device missing |2.4.A.2b| | 2 |
| Exhaust is leaking and excessively noisey |7.1.1b| | 2 |
| Drive chain excessively tight |6.2.1d| | 2 |
| Rear Rear position lamp does not illuminate immediately when it is switched on |1.1.3a| | 2 |
| Fuel system component insecure |7.2.1b| | 2 |
| Rear Wheel spoke excessively loose |4.2.1b| | 2 |
| Front Direction indicator not working |1.5.1c| | 2 |
| Front Roller brake test indicates a binding brake |3.3.A1a| | 2 |
| Nearside Rear Direction indicators not working |1.5.1c| | 2 |
| Rear suspension bearing has excessive free play |2.4.A2a|i|| | 2 |
| Offside Rear Direction indicator not working |1.5.1c| | 2 |
| Nearside Front shock absorber seal failed and leaking oil |2.3.3| | 2 |
| Nearside Rear Footrest missing |6.2.1a| | 2 |
| Offside Rear Footrest missing |6.2.1a| | 2 |
| Locking device|s| not correctly fitted which may make the motor bicycle dangerous to ride |6.2.1h| | 2 |
| Front position lamp does not illuminate immediately when switched on |1.1.3a| | 2 |
| Brake hose damaged | 2 |
| Front wheel bearings have excessive free play |2.3.5b| | 2 |
| Brake hose excessively deteriorated | 2 |
| Rear Rear mono-shock pivot excessively worn |2.4.B.4| | 2 |
| Roller brake test The less effective brake control does not achieve an efficiency of 25%. |3.3.A2b| | 2 |
| Nearside Handlebar handgrip not secure to handlebars. |2.1.1c| | 2 |
| Front Position lamp not working side light in-op (4.2.1 (a)) | 2 |
| Fuel system component leaking |7.2.1a| | 1 |
| Direction indicator not working |1.5.1c| | 1 |
| Front Floor brake test indicates a binding brake |3.3.C2c| | 1 |
| Rear Footrest missing |6.2.1a| | 1 |
| Rear Direction indicator missing |1.5.1a| | 1 |
| Rear position lamp damaged and function impaired |1.1.1b| | 1 |
| All position lamps do not illuminate immediately when switched on |1.1.3a| | 1 |
| Rear All position lamps do not illuminate immediately when switched on |1.1.3a| | 1 |
| Nearside Front Front wheel spindle securing nut locking device missing |2.3.3a| | 1 |
| Nearside Rear Front wheel spindle securing nut locking device missing |2.3.3a| | 1 |
| Rear Wheel more than one fixing loose |5.2.1 |a| |ii|| | 1 |
| Front Wheel bearing has excessive play |5.1.3 |a| |i|| | 1 |
| Rear reflector missing |4.8.2 |a| |ii|| | 1 |
| Front Brake disc|s| has excessive run out |3.2.A1m| | 1 |
| Front Roller brake test indicates excessive fluctuation of brake effort |3.3.A1d| | 1 |
| Offside Front Direction indicator not working |1.5.1c| | 1 |
| Front Direction indicator affected by the operation of another lamp |1.5.1c| | 1 |
| Rear Direction indicator affected by the operation of another lamp |1.5.1c| | 1 |
| Front Direction indicator deteriorated and function impaired |1.5.3a| | 1 |
| Rear Direction indicator deteriorated and function impaired |1.5.3a| | 1 |
| Central Rear Wheel fixing missing |single fixing| |5.2.1 |a| |ii|| | 1 |
| Brake component modification unsafe brake disc fouling calliper (1.1.21 (d) (i)) | 1 |
| Rear Lower Suspension component pin or bush excessively worn (5.3.4 (a) (i)) | 1 |
| Nearside Front Direction indicator not working |1.5.1c| | 1 |
| Offside Front shock absorber seal failed and leaking oil |2.3.3| | 1 |
| Front Wheel spoke excessively loose |4.2.1b| | 1 |
| Nearside Steering lock stop ineffective |2.1.3| | 1 |
| Nearside Rear Direction indicator not working |1.5.1c| | 1 |
| Front Brake master cylinder fluid level dangerously low |3.2.B1d| | 1 |
| Plate brake test No brake control achieves an efficiency of 30%. |3.3.B2a| | 1 |
| Indicator tell tale not operating correctly |1.5.2| | 1 |
| Steering movement excessively stiff with the weight on the lower bearing |2.2.1a| | 1 |
| Roller brake test No brake control achieves an efficiency of 30%. |3.3.A2a| | 1 |
| Steering control fouling between components which interferes with the free movement of the steering |2.1.2a| | 1 |
| Indicator switch does not operate the direction indicators on the side selected |1.5.4| | 1 |
| Front Brake pipe excessively chafed |3.2.B2a| | 1 |
| Rear shock absorber has inadequate damping effect. |2.4.A.3b| | 1 |
| Nearside Front Direction indicators not working |1.5.1c| | 1 |
| Rear wheel bearings have excessive free play |2.4.A.2c| | 1 |
| Rear suspension bush has excessive free play |2.4.A2a|i|| | 1 |
| Offside Rear wheel spindle securing nut locking device insecure |2.4.A.2b| | 1 |
| Front Brake hose fouling |3.2.B3b| | 1 |
| Front Front wheel bearings are excessively rough |2.3.5b| | 1 |
| Rear Rear position lamp insecure |1.1.1c| | 1 |
| Rear Exhaust mounting does not fully support the exhaust system |7.1.1.c| | 1 |
| Rear Rear wheel spindle securing nut locking device missing |2.4.A.2b| | 1 |
| Front Headlamp aim beam image too far to the right |1.6.4| | 1 |
| Front Direction indicator insecure |1.5.3b| | 1 |
| Lower Rear mono-shock pivot excessively worn |2.4.B.4| | 1 |
| Rear position lamp incorrect colour |1.1.2b| | 1 |
| Wheel corroded significantly reducing the original strength |4.2.1a| | 1 |
| Rear Lower Rear mono-shock pivot excessively worn |2.4.B.4| | 1 |
| Rear wheel spindle loose |2.4.A.2b| | 1 |
| Rear Brake cylinder insecurely mounted |3.2.B1a| | 1 |
| Rear Drive chain excessively loose |6.2.1d| | 1 |
| Nearside Rear Footrest insecure |6.2.1a| | 1 |
| Offside Rear Footrest insecure |6.2.1a| | 1 |
| Offside 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 |
| Rear Rear shock absorber has inadequate damping effect. |2.4.A.3b| | 1 |
| Rear Brake pedal has inadequate reserve travel |3.1.3b| | 1 |
| Rear Brake pedal cannot be applied smoothly |3.1.3d| | 1 |
| Front Throttle has a significant change in engine speed whilst moving the steering from lock to lock |2.1.4| | 1 |
| Handlebar deformed |2.1.1b| | 1 |
| Nearside Rear Drive chain horseshoe locking device incorrectly fitted |6.1.7 |j| |i|| | 1 |
| Front Handlebar handgrip not secure to handlebars. |2.1.1c| | 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 |
| Rear position lamp deteriorated and function impaired |1.1.1b| | 1 |
| Rear Locking devices not correctly fitted which may make the motor bicycle dangerous to ride |6.2.1h| | 1 |
| Front Hydraulic brake control feels spongy |3.1.4a| | 1 |
| Lower Rear suspension bush has excessive free play |2.4.A2a|i|| | 1 |
| Rear Stop lamp remains on when the brake is released |1.3.1e| | 1 |
| Horn is not a constant note |1.7.3c| | 1 |
| Front Direction indicators affected by the operation of another lamp |1.5.1c| | 1 |
| Rear Direction indicators flashing less than 60 times a minute |1.5.1c| | 1 |
| Offside Rear Direction indicators not working |1.5.1c| | 1 |
| Front Wheel corroded significantly reducing the original strength |4.2.1a| | 1 |
| Rear Suspension arm pin or bush excessively worn linkage bearings/bushes (5.3.4 (a) (i)) | 1 |
| Rear Drive chain sprocket worn to excess (6.1.7 (c) (i)) | 1 |
| Drive chain worn to excess (6.1.7 (c) (i)) | 1 |
| Front wheel spindle securing nut locking device missing |2.3.3a| | 1 |
| Rear Front wheel spindle securing nut locking device missing |2.3.3a| | 1 |
| Headlamp at least one does not illuminate on main beam |1.2.2a|ii|| | 1 |
| Rear Roller brake test indicates excessive fluctuation of brake effort |3.3.A1d| | 1 |
| Horn sound not in accordance with requirements not loud enough (7.7 (c)) | 1 |
| Wheel spindle locking device missing split pin missing (5.2.1 (d)) | 1 |
| Rear Wheel spindle or securing nut(s) so insecure that wheel security or steering control is adversely affected wheel insecure (5.2.1 (c) (ii)) | 1 |
| Brake lever has inadequate reserve travel |3.1.3b| | 1 |
| Front position lamp obscured more than 50% |1.1.1d| | 1 |
| Direction indicators affected by the operation of another lamp |1.5.1c| | 1 |
| Front Exhaust mounting does not fully support the exhaust system |7.1.1.c| | 1 |
| Exhaust excessively deteriorated |7.1.1a| | 1 |
| Rear Exhaust is leaking and excessively noisey |7.1.1b| | 1 |
| Rear Rear wheel bearings have excessive free play |2.4.A.2c| | 1 |
| Rear Direction indicator not working |1.5.1c| | 1 |