| Most common failures | No# failures |
|---|
| Headlamp aim out of alignment | 29 |
| Rear reflector on motorcycle missing |1.4.1| | 17 |
| Registration plate issues | 14 |
| Headlamp at least one does not illuminate on dipped beam |1.2.2a|i|| | 12 |
| Rear wheel spindle securing nut locking device missing |2.4.A.2b| | 9 |
| Rear reflector missing (4.8.2 (a) (ii)) | 7 |
| Rear wheel bearings have excessive free play |2.4.A.2c| | 6 |
| Rear position lamp does not illuminate immediately when it is switched on |1.1.3a| | 6 |
| Drive chain worn to excess |6.2.1e| | 4 |
| Headlamp at least one does not illuminate on main beam |1.2.2a|ii|| | 3 |
| Horn not working |1.7.3a| | 3 |
| Registration plate lamp issues | 3 |
| Rear Rear reflector on motorcycle missing |1.4.1| | 3 |
| Front wheel bearings have excessive free play |2.3.5b| | 3 |
| Drive chain excessively loose |6.2.1d| | 3 |
| Front Headlamp dipped beam affected by the operation of another lamp |1.2.2c| | 2 |
| Front Front wheel bearings have excessive free play |2.3.5b| | 2 |
| Rear suspension movement is excessively stiff |2.4.A.3b| | 2 |
| Nearside Rear Direction indicator not working |1.5.1c| | 2 |
| Front Headlamp not working on main beam (4.1.1 (a) (ii)) | 2 |
| Front Headlamp at least one does not illuminate on dipped beam |1.2.2a|i|| | 2 |
| Rear Lower Shock absorber has an excessively worn bush (5.3.2 (c)) | 2 |
| Headlamp not working on dipped beam |4.1.1 |a| |ii|| | 2 |
| Rear Rear position lamp does not illuminate immediately when it is switched on |1.1.3a| | 2 |
| Stop lamp remains on when the brakes are released | 2 |
| Nearside Handlebar handgrip not secure to handlebars. |2.1.1c| | 2 |
| Rear Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 2 |
| Headlamp not working on dipped beam (4.1.1 (a) (ii)) | 2 |
| Offside Rear Direction indicator missing |1.5.1a| | 2 |
| Clutch lever shortened so it cannot be readily operated. |6.2.1g| | 2 |
| Front Wheel spoke excessively loose |4.2.1b| | 2 |
| Offside Front Direction indicators not working |1.5.1c| | 2 |
| Offside Rear Direction indicators not working |1.5.1c| | 2 |
| Central Rear Stop lamp not working (4.3.1 (a) (ii)) | 1 |
| Headlamp switch faulty |1.2.4| | 1 |
| Front Headlamp at least one does not illuminate on main beam |1.2.2a|ii|| | 1 |
| Rear suspension bearing has excessive free play |2.4.A2a|i|| | 1 |
| Lower Rear suspension bush has excessive free play |2.4.A2a|i|| | 1 |
| Centre Rear position lamp does not illuminate immediately when it is switched on |1.1.3a| | 1 |
| Upper Fuel system component leaking |7.2.1a| | 1 |
| Offside Rear Direction indicator damaged and function impaired |1.5.3a| | 1 |
| Fuel system component leaking |7.2.1a| | 1 |
| Brake performance not tested |3.3| | 1 |
| Decelerometer brake test no brake control achieves an efficiency of 30% |3.3.E1a| | 1 |
| Decelerometer brake test neither brake control achieves an efficiency of 25% |3.3.E1c| | 1 |
| Rear Shock absorber has an excessively worn bush (5.3.2 (c)) | 1 |
| Front Wheel spoke excessively loose (5.2.2 (d)) | 1 |
| Centre Front Horn not working |1.7.3a| | 1 |
| Handlebar deformed |2.1.1b| | 1 |
| Direction indicator missing |1.5.1a| | 1 |
| Rear shock absorber seal failed and leaking oil |2.4.A.1c| | 1 |
| Rear Suspension component attachment bracket/mounting likely to fail BOLT MISSING (5.3.3 (b) (ii)) | 1 |
| Offside Front Direction indicator not working |1.5.1c| | 1 |
| Front suspension assembly component loose fork clamp yoke bolts |2.3.1| | 1 |
| Fuel cap missing breather pipe |7.2.2a| | 1 |
| Front position lamp does not illuminate immediately when switched on |1.1.3a| | 1 |
| Rear Rear mono-shock pivot excessively worn |2.4.B.4| | 1 |
| Front Direction indicators not working |1.5.1c| | 1 |
| Nearside An item not tested |Manual| | 1 |
| Nearside Front Direction indicators not working |1.5.1c| | 1 |
| Handlebar mounting clamp loose loose on top yoke |2.1.1a| | 1 |
| Headlamp not working on main beam |4.1.1 |a| |ii|| | 1 |
| Offside Footrest insecure (6.2.12 (a)) | 1 |
| Rear Stop lamp not working check brake switch (4.3.1 (a) (ii)) | 1 |
| Rear Direction indicator obviously incorrectly positioned (4.4.3 (a)) | 1 |
| Front Headlamp not working on dipped beam (4.1.1 (a) (ii)) | 1 |
| Nearside Front Direction indicator not working |1.5.1c| | 1 |
| Front Brake lever has restricted free movement |1.1.15 |e|| | 1 |
| Headlamp not working on main beam (4.1.1 (a) (ii)) | 1 |
| Rear Shock absorber has negligible damping effect (5.3.2 (b)) | 1 |
| Rear Shock absorber has a serious fluid leak (5.3.2 (b)) | 1 |
| Rear Drive chain sprocket worn to excess |6.2.1e| | 1 |
| Front Brake disc|s| excessively worn |3.2.A1l| | 1 |
| Brake lever is bent and the brake cannot be readily applied |3.1.3c| | 1 |
| Exhaust is leaking and excessively noisey |7.1.1b| | 1 |
| Locking device|s| not correctly fitted which may make the motor bicycle dangerous to ride Front sprocket nut loose |6.2.1h| | 1 |
| Offside Direction indicator incorrect colour both (4.4.3 (a)) | 1 |
| Nearside Front Direction indicator incorrect colour (4.4.3 (a)) | 1 |
| Drive chain excessively loose (6.1.7 (c) (i)) | 1 |
| Drive chain worn to excess (6.1.7 (c) (i)) | 1 |
| Drive chain sprocket worn to excess (6.1.7 (c) (i)) | 1 |
| Front Position lamp switch insecure |1.1.4b| | 1 |
| Handlebar handgrip not secure to handlebars. |2.1.1c| | 1 |
| Dipswitch does not operate immediately when selected on dipped beam (4.1.3 (b)) | 1 |
| Front Headlamp insecure (4.1.1 (c)) | 1 |
| Headlamp aim not tested (4.1.2 (b)) | 1 |
| Nearside Front Direction indicator likely to become detached (4.4.1 (c) (ii)) | 1 |
| Rear Shock absorber has an excessively worn bush lower bush (5.3.2 (c)) | 1 |
| Rear Suspension component pin or bush excessively worn lower suspension linkages (5.3.4 (a) (i)) | 1 |
| Direction indicators not working |1.5.1c| | 1 |
| Rear Rear suspension bearing has excessive free play swinging arm pivot point |2.4.A2a|i|| | 1 |
| Rear position lamp incorrect colour |1.1.2b| | 1 |
| Offside Footrest insecure |6.2.1a| | 1 |
| Front Horn sound not in accordance with requirements (7.7 (c)) | 1 |
| Offside Front Brake lever has insufficient reserve travel (1.1.2 (a)) | 1 |
| Rear Stop lamp not working switch spring missing (4.3.1 (a) (ii)) | 1 |
| Rear Rear wheel bearings have excessive free play |2.4.A.2c| | 1 |
| Rear suspension bearing has excessive free play Swing arm bearings |2.4.A2a|i|| | 1 |
| Rear Rear wheel spindle securing nut locking device missing |2.4.A.2b| | 1 |
| Front Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 1 |
| Nearside Rear Direction indicator insecure |1.5.3b| | 1 |
| Offside Handlebar handgrip not secure to handlebars. |2.1.1c| | 1 |
| Rear Brake disc|s| excessively worn |3.2.A1l| | 1 |
| Offside Lower Motorcycle structure cracked |6.1.1a| | 1 |
| Front Direction indicator not working (4.4.1 (a) (ii)) | 1 |
| Fuel system component leaking leaking from carburettor |7.2.1a| | 1 |
| Nearside Rear Direction indicator missing |1.5.1a| | 1 |
| Indicator switch insecure |1.5.4| | 1 |
| Front Brake lever has inadequate reserve travel |3.1.3b| | 1 |
| Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 1 |
| Offside Rear Direction indicator insecure |1.5.3b| | 1 |
| Nearside Front Direction indicator insecure |1.5.3b| | 1 |
| Wheel alignment incorrect which adversely affects the handling |2.5.1| | 1 |
| Front Roller brake test indicates excessive fluctuation of brake effort |3.3.A1d| | 1 |
| Front Brake lever is bent and the brake cannot be readily applied |3.1.3c| | 1 |
| Rear Wheel spoke cracked. |4.2.1b| | 1 |
| Central Rear Wheel bearing has excessive play |5.1.3 |a| |i|| | 1 |
| Offside Front Footrest insecure |6.2.1a| | 1 |
| Offside Rear Footrest missing |6.2.1a| | 1 |
| Exhaust markings indicating not for road use or similar wording |7.1.4| | 1 |
| Front Shock absorber has a serious fluid leak (5.3.2 (b)) | 1 |
| Rear Direction indicators not working |1.5.1c| | 1 |
| Rear Lower Shock absorber has an excessively worn bush to linkage (5.3.2 (c)) | 1 |
| Rear Direction indicator obviously incorrectly positioned less than 180mm apart (4.4.3 (a)) | 1 |
| Rear Position lamp not working |4.2.1 |a|| | 1 |
| Rear reflector missing |4.8.2 |a| |ii|| | 1 |
| Rear Drive chain worn to excess |6.2.1e| | 1 |
| Front Drive chain sprocket worn to excess |6.2.1e| | 1 |
| Headlamp dipped beam affected by the operation of another lamp |1.2.2c| | 1 |
| Offside Rear Direction indicator likely to become detached |4.4.1 |c| |ii|| | 1 |
| Headlamp aim beam image kick up to the offside |1.6| | 1 |