| Most common failures | No# failures |
|---|
| Headlamp aim out of alignment | 85 |
| Headlamp aim beam image kick up to the offside |1.6| | 42 |
| Registration plate issues | 30 |
| Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 15 |
| Front Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 14 |
| Rear Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 10 |
| Front Headlamp aim beam image kick-up is to the offside |1.6.1| | 9 |
| Front position lamp does not illuminate immediately when switched on |1.1.3a| | 7 |
| Front wheel bearings have excessive free play |2.3.5b| | 6 |
| Rear position lamp does not illuminate immediately when it is switched on |1.1.3a| | 6 |
| Drive chain excessively loose |6.2.1d| | 6 |
| Headlamp at least one does not illuminate on dipped beam |1.2.2a|i|| | 5 |
| Nearside Handlebar handgrip not secure to handlebars. |2.1.1c| | 5 |
| Headlamp aim beam image kick up to the offside (1.6) | 5 |
| Rear Wheel spoke excessively loose |4.2.1b| | 4 |
| Front Headlamp aim beam image kick up to the offside |1.6| | 4 |
| Rear reflector missing (4.8.2 (a) (ii)) | 4 |
| Front Roller brake test indicates a binding brake |3.3.A1a| | 4 |
| Headlamp aim beam image kick-up is to the offside |1.6.1| | 4 |
| Rear reflector on motorcycle missing |1.4.1| | 3 |
| Headlamp at least one does not illuminate on main beam |1.2.2a|ii|| | 3 |
| Rear wheel bearings have excessive free play |2.4.A.2c| | 3 |
| Throttle operating incorrectly |6.2.1f| | 3 |
| Rear Position lamp not working |4.2.1 |a|| | 3 |
| Rear Stop lamp not working (4.3.1 (a) (ii)) | 3 |
| Direction indicators not working |1.5.1c| | 2 |
| Nearside Rear Direction indicators not working |1.5.1c| | 2 |
| Offside Front Footrest insecure |6.2.1a| | 2 |
| Brake locking device missing |3.2.A1e| | 2 |
| Front wheel bearings are excessively rough |2.3.5b| | 2 |
| Locking devices not correctly fitted which may make the motor bicycle dangerous to ride |6.2.1h| | 2 |
| Front Front wheel bearings have excessive free play |2.3.5b| | 2 |
| Registration plate lamp issues | 2 |
| Front Position lamp not working (4.2.1 (a)) | 2 |
| Stop lamp does not illuminate by the operation of both brake controls (4.3.2 (a) (iii)) | 2 |
| Rear Brake locking device missing |3.2.A1e| | 2 |
| Stop lamp does not illuminate immediately a brake applies (1.3.1a) | 2 |
| Headlamp aim projected beam image obviously incorrect (4.1.2 (c)) | 2 |
| Nearside Front Direction indicator not working |1.5.1c| | 1 |
| Front Steering control fouling between components which interferes with the free movement of the steering |2.1.2a| | 1 |
| Nearside Exhaust system insecure |6.1.2 |a|| | 1 |
| Rear Roller brake test indicates a binding brake |3.3.A1a| | 1 |
| Front Stop lamp not working (4.3.1 (a) (ii)) | 1 |
| Front Wheel bearing has excessive play (5.1.3 (a) (i)) | 1 |
| Centre Rear Brake back plate|s| insecure |3.2.A1j| | 1 |
| Headlamp not working on main beam |4.1.1 |a| |ii|| | 1 |
| Steering movement excessively stiff with the weight on the lower bearing |2.2.1a| | 1 |
| Rear wheel rotation likely to be impeded |6.2.1b| | 1 |
| Rear Stop lamp remains on when the brake is released |1.3.1e| | 1 |
| Front Brake lever is positioned so that the brake cannot be readily applied (3.1.3c) | 1 |
| Front wheel spindle securing nut|s| loose |2.3.3a| | 1 |
| Stop lamp remains on when the brakes are released | 1 |
| Central Front Upper Headlamp aim so that beam "kick up" is not visible on the screen |4.1.2 |a|| | 1 |
| Nearside Front Shock absorber has a serious fluid leak (5.3.2 (b)) | 1 |
| Offside Rear Direction indicator not working |1.5.1c| | 1 |
| Centre Front Upper Headlamp aim beam image kick up to the offside |1.6| | 1 |
| Offside Rear Locking devices not correctly fitted which may make the motor bicycle dangerous to ride |6.2.1h| | 1 |
| Offside Footrest insecure |6.2.1a| | 1 |
| Front Sidecar structure joining/attachment plate or fastening insecure locking device missing |6.1.1 |b| |i|| | 1 |
| Offside Handlebar grip insecure to handlebar Rhs grip insecure (2.2.1 (d) (ii)) | 1 |
| Nearside Handlebar grip insecure to handlebar |2.2.1 |d| |ii|| | 1 |
| Front Roller brake test indicates excessive fluctuation of brake effort |3.3.A1d| | 1 |
| Offside Rear Lower Rear suspension component loose bolt loose |2.4.A.1a| | 1 |
| Direction indicators affected by the operation of another lamp |1.5.1c| | 1 |
| All position lamps adversely affected by the operation of another lamp |1.1.3b| | 1 |
| Offside Exhaust excessively deteriorated |7.1.1a| | 1 |
| Front Stop lamp does not illuminate immediately a brake applies (1.3.1a) | 1 |
| Nearside Rear Direction indicators not working (1.5.1c) | 1 |
| Centre Rear Rear reflector on motorcycle missing (1.4.1) | 1 |
| Offside Rear Direction indicators not working (1.5.1c) | 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 |
| Centre Rear Stop lamp does not illuminate immediately a brake applies (1.3.1a) | 1 |
| Offside Front Throttle has a significant change in engine speed whilst moving the steering from lock to lock (2.1.4) | 1 |
| Headlamp aim projected beam image obviously incorrect Beam kick to right hand (4.1.2 (c)) | 1 |
| Headlamp not working on dipped beam (4.1.1 (a) (ii)) | 1 |
| Horn not working (7.7 (a)) | 1 |
| Front Brake lever cannot be applied smoothly |3.1.3d| | 1 |
| Brake pedal cannot be released smoothly |3.1.3d| | 1 |
| Rear Brake component has restricted free movement and operation is likely to be impeded |3.2.A1h| | 1 |
| Rear reflector missing |4.8.2 |a| |ii|| | 1 |
| Rear Wheel spoke excessively bent |4.2.1b| | 1 |
| Drive chain excessively tight (6.1.7 (k) (i)) | 1 |
| Nearside Rear Direction indicator not working |1.5.1c| | 1 |
| Offside Rear Exhaust mounting does not fully support the exhaust system |7.1.1.c| | 1 |
| Offside Rear Direction indicators not working |1.5.1c| | 1 |
| Nearside 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 |
| Offside 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 |
| Offside Front Direction indicators not working |1.5.1c| | 1 |
| Rear Position lamp not working (4.2.1 (a)) | 1 |
| Offside Front Stop lamp not working brake control |4.3.1 |a| |ii|| | 1 |
| Rear Rear position lamp deteriorated and function impaired |1.1.1b| | 1 |
| Rear Stop lamp does not emit a steady light |1.3.1b| | 1 |
| Rear shock absorber has inadequate damping effect. (2.4.A.3b) | 1 |
| Lower Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 1 |
| Nearside Front 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 |
| Chain guard insecure |6.2.1c| | 1 |
| Rear Brake component inadequately mounted TORQUE ARM LOCKING DEVICE MISSING (split pin) (1.1.21 (c)) | 1 |
| Rear Brake reaction bracket insecure |3.2.A1j| | 1 |
| Front Brake lever has insufficient reserve travel (1.1.2 (a)) | 1 |
| Drive chain excessively loose (6.1.7 (c) (i)) | 1 |
| Rear Stop lamp does not illuminate immediately a brake applies (1.3.1a) | 1 |
| Front Brake effort inadequate at a wheel Front brake when operated slowly no effort recorded at wheel (1.2.1 (a) (i)) | 1 |
| Brake lever has insufficient reserve travel front brake lever (1.1.2 (a)) | 1 |
| Roller brake test The less effective brake control does not achieve an efficiency of 25% (1.2.2 (a) (i)) | 1 |
| Rear Stop lamp not working |4.3.1 |a| |ii|| | 1 |
| Front Brake excessively binding |1.2.1 |f|| | 1 |
| Rear position lamp adversely affected by the operation of another lamp |1.1.3b| | 1 |
| Steering headbearing has excessive free play |2.2.2| | 1 |
| Nearside Outer Brake component worn and seriously reduced in strength |3.2.A1| | 1 |
| Inner Rear suspension bush has excessive free play |2.4.A2a|i|| | 1 |
| Brake pedal has inadequate reserve travel |3.1.3b| | 1 |
| Front Front position lamp does not face the front |1.1.1d| | 1 |
| Front Stop lamp not working |4.3.1 |a| |ii|| | 1 |
| Offside Front Roller brake test indicates a sticking brake |3.3.A1a| | 1 |
| Centre Front Headlamp aim beam image kick up to the offside |1.6| | 1 |
| Centre Front Front position lamp does not illuminate immediately when switched on |1.1.3a| | 1 |
| Front Brake lining|s| less than 1.5 mm thick |3.2.A1f|i|| | 1 |
| Rear Brake indicates excessive fluctuation of brake effort (1.2.1 (e)) | 1 |
| Nearside Front Handlebar handgrip not secure to handlebars. |2.1.1c| | 1 |
| Offside Front Handlebar handgrip not secure to handlebars. |2.1.1c| | 1 |
| Headlamp aim headlamp deteriorated and function impaired |1.2.3a| | 1 |
| Front Position lamp adversely affected by the operation of another lamp side light (4.2.3 (b)) | 1 |
| Steering operation restricted in free movement from lock to lock (2.1.4 (c)) | 1 |
| Brake disc|s| excessively worn |3.2.A1l| | 1 |
| Offside Footrest insecure (6.2.1a) | 1 |
| Stop lamp does not emit a steady light (1.3.1b) | 1 |
| Front Stop lamp adversely affected by the operation of another lamp (4.3.3 (b)) | 1 |
| Rear Stop lamp adversely affected by the operation of another lamp (4.3.3 (b)) | 1 |
| Wheel alignment incorrect which adversely affects the handling |2.5.1| | 1 |
| Rear Rear reflector on motorcycle missing |1.4.1| | 1 |
| Rear Drive chain excessively loose (6.1.7 (c) (i)) | 1 |
| Front Brake disc|s| has excessive run out |3.2.A1m| | 1 |
| Stop lamp not working |4.3.1 |a| |ii|| | 1 |
| Front Brake lever has inadequate reserve travel |3.1.3b| | 1 |
| Nearside Drive chain excessively loose |6.2.1d| | 1 |
| Stop lamp not working with front brake control |4.3.1 |a| |ii|| | 1 |
| Front Horn not working (7.7 (a) (ii)) | 1 |
| Rear Drive chain excessively tight (6.1.7 (k) (i)) | 1 |
| Rear Rear reflector missing |4.8.2 |a| |ii|| | 1 |
| Stop lamp not working Front and rear (4.3.1 (a) (ii)) | 1 |
| Nearside Sidecar wheel bearings have excessive free play |5.2.3c| | 1 |
| Nearside Sidecar rear position lamp does not illuminate immediately when it is switched on |1.1.3a| | 1 |
| Sidecar front position lamp does not illuminate immediately when it is switched on |1.1.3a| | 1 |
| Nearside Front Roller brake test indicates a binding brake |3.3.A1a| | 1 |
| Rear Headlamp reflector missing (4.1.1 (b) (ii)) | 1 |
| Upper Sidecar attachment insecure |5.1.1b| | 1 |
| Front mudguard insecure |2.3.7| | 1 |
| Front Brake pipe inadequately supported |3.2.B2b| | 1 |
| Rear Shock absorber has negligible damping effect (5.3.2 (b)) | 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 shock absorber seal failed and leaking oil |2.3.3| | 1 |
| Motorcycle structure joining/attachment plate or fastening insecure (6.1.1 (b) (i)) | 1 |
| Front Steering headbearing has excessive free play |2.2.2| | 1 |
| Centre Front wheel bearings have excessive free play |2.3.5b| | 1 |
| Centre Front wheel bearings are excessively rough |2.3.5b| | 1 |
| Rear All position lamps do not illuminate immediately when switched on |1.1.3a| | 1 |
| Offside Front Lower Shock absorber has a serious fluid leak (5.3.2 (b)) | 1 |
| Offside Front Shock absorber has negligible damping effect (5.3.2 (b)) | 1 |
| Rear wheel spindle securing nut locking device missing |2.4.A.2b| | 1 |
| Headlamp not working on dipped beam |4.1.1 |a| |ii|| | 1 |
| Position lamp not working REAR |4.2.1 |a|| | 1 |
| Rear Rear reflector missing (4.8.2 (a) (ii)) | 1 |
| Rear shock absorber insecurely mounted O/S |2.4.A.3b| | 1 |