| Most common failures | No# failures |
|---|
| Rear reflector on motorcycle missing |1.4.1| | 29 |
| Headlamp aim out of alignment | 26 |
| Registration plate issues | 22 |
| Front Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 13 |
| Headlamp at least one does not illuminate on dipped beam |1.2.2a|i|| | 12 |
| Headlamp at least one does not illuminate on main beam |1.2.2a|ii|| | 10 |
| Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 9 |
| Rear position lamp does not illuminate immediately when it is switched on |1.1.3a| | 8 |
| Rear Rear reflector on motorcycle missing |1.4.1| | 8 |
| Horn not working |1.7.3a| | 8 |
| Rear Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 6 |
| Rear wheel bearings have excessive free play |2.4.A.2c| | 6 |
| Front position lamp does not illuminate immediately when switched on |1.1.3a| | 5 |
| Steering headbearing has excessive free play |2.2.2| | 4 |
| Exhaust is leaking and excessively noisey |7.1.1b| | 4 |
| 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| | 4 |
| Drive chain excessively loose |6.2.1d| | 4 |
| Offside Front shock absorber seal failed and leaking oil |2.3.3| | 4 |
| Rear reflector missing (4.8.2 (a) (ii)) | 4 |
| Offside Rear Direction indicator not working |1.5.1c| | 3 |
| Front Headlamp at least one does not illuminate on dipped beam |1.2.2a|i|| | 3 |
| Nearside Handlebar handgrip not secure to handlebars. |2.1.1c| | 3 |
| Rear Wheel spoke excessively loose |4.2.1b| | 3 |
| Direction indicators flashing more than 120 times per minute |1.5.1c| | 3 |
| Headlamp insecure |1.2.3b| | 3 |
| Floor brake test The less effective brake control does not achieve an efficiency of 25%. |3.3.C1b| | 2 |
| Fuel cap sealing washer missing |7.2.2c| | 2 |
| Front Headlamp at least one does not illuminate on main beam |1.2.2a|ii|| | 2 |
| Headlamp dipped beam affected by the operation of another lamp |1.2.2c| | 2 |
| Rear Front position lamp does not illuminate immediately when switched on |1.1.3a| | 2 |
| Front wheel bearings have excessive free play |2.3.5b| | 2 |
| Drive chain excessively tight |6.2.1d| | 2 |
| Throttle operating incorrectly |6.2.1f| | 2 |
| Offside Exhaust mounting does not fully support the exhaust system |7.1.1.c| | 2 |
| Headlamp not working on main beam |4.1.1 |a| |ii|| | 2 |
| Horn not loud enough to be heard by another road user |1.7.3a| | 2 |
| Headlamp aim not tested |1.6| | 2 |
| Front position lamp missing |1.1.1a| | 2 |
| Headlamp aim beam image kick up to the offside |1.6| | 2 |
| Nearside Rear Rear reflector missing (4.8.2 (a) (ii)) | 2 |
| Offside Rear Rear reflector missing (4.8.2 (a) (ii)) | 2 |
| Front Roller brake test indicates excessive fluctuation of brake effort |3.3.A1d| | 2 |
| Offside Steering lock stop ineffective |2.1.3| | 2 |
| Offside Rear Direction indicators not working |1.5.1c| | 2 |
| Front Brake caliper|s| securing bolt|s| loose |3.2.A1j| | 2 |
| Steering lock stop missing |2.1.3| | 1 |
| Front Stop lamp remains on when the brake is released |1.3.1e| | 1 |
| Rear Rear wheel bearings have excessive free play |2.4.A.2c| | 1 |
| Rear position lamp adversely affected by the operation of another lamp |1.1.3b| | 1 |
| Front Stop lamp not working (4.3.1 (a) (ii)) | 1 |
| Rear Brake fluid reservoir fluid level significantly below minimum level |1.1.10 |d| |ii|| | 1 |
| Front Brake disc significantly and obviously worn |1.1.14 |a| |i|| | 1 |
| Front Brake caliper inadequately mounted |1.1.16 |c| |i|| | 1 |
| Front Brake component modification unsafe |1.1.21 |d| |i|| | 1 |
| Rear Brake disc|s| excessively worn |3.2.A1l| | 1 |
| Nearside Direction indicators not working |1.5.1c| | 1 |
| Offside Direction indicators not working |1.5.1c| | 1 |
| Horn control not functioning. |1.7.2b| | 1 |
| Steering movement excessively stiff with the wheel raised |2.2.1b| | 1 |
| Fuel pipe leaking |7.2.1a| | 1 |
| Front Steering movement excessively `notchy` with the wheel raised |2.2.1b| | 1 |
| Direction indicator not working |1.5.1c| | 1 |
| Nearside Steering lock stop ineffective |2.1.3| | 1 |
| Front shock absorber seal failed and leaking oil |2.3.3| | 1 |
| Exhaust mounting does not fully support the exhaust system |7.1.1.c| | 1 |
| Nearside Rear Direction indicators not working |1.5.1c| | 1 |
| Rear Roller brake test indicates a severely grabbing brake |3.3.A1b| | 1 |
| Front Brake disc|s| securing bolt|s| missing |3.2.A1g| | 1 |
| Drive chain fouling another component |6.2.1d| | 1 |
| Front Wheel bearing has excessive play (5.1.3 (a) (i)) | 1 |
| Front wheel spindle loose |2.3.5a| | 1 |
| Rear wheel spindle loose |2.4.A.2b| | 1 |
| Front Front position lamp missing |1.1.1a| | 1 |
| Brake caliper|s| insecure |3.2.A1j| | 1 |
| Front Stop lamp damaged and function impaired |1.3.3a| | 1 |
| Rear Stop lamp damaged and function impaired |1.3.3a| | 1 |
| Rear position lamp damaged and function impaired |1.1.1b| | 1 |
| Rear Rear wheel has a loose wheel nut|s| |4.2.3a| | 1 |
| Wheel alignment incorrect which adversely affects the handling |2.5.1| | 1 |
| Headlamp not working on dipped beam |4.1.1 |a| |ii|| | 1 |
| Rear Position lamp not working |4.2.1 |a|| | 1 |
| Headlamp switch insecure |1.2.4| | 1 |
| Headlamp not working on dipped beam (4.1.1 (a) (ii)) | 1 |
| Rear Position lamp not working (4.2.1 (a)) | 1 |
| Front Front suspension assembly component loose |2.3.1| | 1 |
| Direction indicators flashing less than 60 times a minute |1.5.1c| | 1 |
| Indicator switch insecure |1.5.4| | 1 |
| Nearside Fuel hose leaking |7.2.1a| | 1 |
| Centre Rear Rear reflector on motorcycle missing |1.4.1| | 1 |
| Offside Front Front wheel bearings have excessive free play |2.3.5b| | 1 |
| Rear shock absorber has inadequate damping effect. |2.4.A.3b| | 1 |
| Nearside Direction indicator flashing more than 120 times per minute |1.5.1c| | 1 |
| Offside Direction indicator flashing more than 120 times per minute |1.5.1c| | 1 |
| Front Roller brake test indicates a binding brake |3.3.A1a| | 1 |
| Rear Suspension arm pin or bush excessively worn (5.3.4 (a) (i)) | 1 |
| Suspension arm pin or bush excessively worn Slde car (5.3.4 (a) (i)) | 1 |
| Rear Sidecar wheel bearings are excessively rough |5.2.3d| | 1 |
| Offside Front Direction indicator not working (4.4.1 (a) (ii)) | 1 |
| Front Headlamp aim beam image kick-up is to the offside |1.6.1| | 1 |
| Rear Wheel alignment incorrect which adversely affects the handling |2.5.1| | 1 |
| Rear Brake master cylinder insecurely mounted |3.2.B1a| | 1 |
| Locking device|s| not correctly fitted which may make the motor bicycle dangerous to ride |6.2.1h| | 1 |
| Fuel system component leaking carb over flow |7.2.1a| | 1 |
| Rear suspension bush has excessive free play Nearside swing arm bush |2.4.A2a|i|| | 1 |
| Front Front shock absorber seal failed and leaking oil |2.3.3| | 1 |
| Front Brake disc|s| cracked |3.2.A1g| | 1 |
| Nearside Rear suspension bush has excessive free play |2.4.A2a|i|| | 1 |
| Nearside Front shock absorber seal failed and leaking oil |2.3.3| | 1 |
| Headlamp aim headlamp deteriorated and function impaired |1.2.3a| | 1 |
| Nearside Direction indicator missing |1.5.1a| | 1 |
| Nearside Front Direction indicator missing |1.5.1a| | 1 |
| Rear Rear position lamp does not illuminate immediately when it is switched on |1.1.3a| | 1 |
| Front Direction indicators flashing more than 120 times per minute |1.5.1c| | 1 |
| Rear Direction indicators flashing more than 120 times per minute |1.5.1c| | 1 |
| Front position lamp incorrect colour |1.1.2a| | 1 |
| Steering control handlebar movement restricted by taut cables |2.1.2c| | 1 |
| All position lamps do not illuminate immediately when switched on |1.1.3a| | 1 |
| Front Brake lever is so short and the brake cannot be readily applied |3.1.3c| | 1 |
| Nearside Front Direction indicator not working |1.5.1c| | 1 |
| Direction indicator missing |1.5.1a| | 1 |
| Nearside Front Direction indicators not working |1.5.1c| | 1 |
| Footrest insecure |6.2.1a| | 1 |
| Dipswitch does not deflect the main beam/s, making them into dipped beam/s |1.2.2b|ii|| | 1 |
| Rear Stop lamp does not illuminate immediately a brake applies brake pedal |1.3.1a| | 1 |
| Front Horn not working |1.7.3a| | 1 |
| Rear wheel bearings are excessively rough |2.4.A.2c| | 1 |
| Nearside Handlebar grip insecure to handlebar (2.2.1 (d) (ii)) | 1 |
| Offside Handlebar grip insecure to handlebar (2.2.1 (d) (ii)) | 1 |
| Horn not working (7.7 (a) (ii)) | 1 |
| Headlamp aim so that beam "kick up" is not visible on the screen bulb appears to be incorrectly fitted (4.1.2 (a)) | 1 |
| Rear suspension bush has excessive free play swingarm bushes |2.4.A2a|i|| | 1 |
| Stop lamp remains on when the brake is released |1.3.1e| | 1 |
| Front Hydraulic brake control creeps under load. |3.1.4a| | 1 |
| Front Brake lever has inadequate reserve travel |3.1.3b| | 1 |
| Rear Stop lamp affected by the operation of another lamp |1.3.2| | 1 |
| Rear reflector on motorcycle incorrectly positioned |1.4.2d| | 1 |
| Headlamp main beam affected by the operation of another lamp |1.2.2c| | 1 |
| Lower Drive chain fouling another component |6.2.1d| | 1 |
| Rear Drive chain worn to excess |6.2.1e| | 1 |
| Nearside Rear Direction indicator not working |1.5.1c| | 1 |
| Rear wheel spindle securing nut locking device missing |2.4.A.2b| | 1 |
| Suspension attachment bracket/mounting insecure (5.3.3 (a) (i)) | 1 |
| Drive chain horseshoe locking device incorrectly fitted (6.1.7 (j) (i)) | 1 |
| Offside Front Direction indicators not working |1.5.1c| | 1 |
| Front Rear wheel bearings have excessive free play |2.4.A.2c| | 1 |
| Rear reflector on sidecar missing |1.4.1| | 1 |
| Steering movement excessively `notchy` with the wheel raised |2.2.1b| | 1 |
| Headlamp aim headlamp damaged and function impaired |1.2.3a| | 1 |
| Offside Front wheel spindle securing nut locking device missing |2.3.5a| | 1 |
| Rear wheel spindle securing nut|s| loose |2.4.A.2b| | 1 |
| Footrest missing |6.2.1a| | 1 |
| Dipswitch does not operate immediately when selected on dipped beam (4.1.3 (b)) | 1 |
| Front Valve stem seriously damaged (5.2.3 (j)) | 1 |
| Rear Valve stem seriously damaged (5.2.3 (j)) | 1 |
| Front Stop lamp not working switch failed (4.3.1 (a) (ii)) | 1 |
| Suspension arm pin or bush excessively worn Swingarm bearings, excessive play (5.3.4 (a) (i)) | 1 |