| Most common failures | No# failures |
|---|
| Registration plate issues | 32 |
| Rear reflector on motorcycle missing |1.4.1| | 27 |
| Headlamp at least one does not illuminate on dipped beam |1.2.2a|i|| | 20 |
| Horn not working |1.7.3a| | 9 |
| Rear reflector missing (4.8.2 (a) (ii)) | 9 |
| Headlamp aim out of alignment | 8 |
| Headlamp not working on dipped beam (4.1.1 (a) (ii)) | 6 |
| Headlamp at least one does not illuminate on main beam |1.2.2a|ii|| | 5 |
| Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 5 |
| Front wheel bearings have excessive free play |2.3.5b| | 4 |
| Rear wheel bearings have excessive free play |2.4.A.2c| | 4 |
| Front Front wheel bearings have excessive free play |2.3.5b| | 4 |
| Rear Rear reflector on motorcycle missing |1.4.1| | 4 |
| Rear Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 4 |
| Rear reflector missing |4.8.2 |a| |ii|| | 3 |
| Headlamp aim not tested (4.1.2 (b)) | 3 |
| Front position lamp does not illuminate immediately when switched on |1.1.3a| | 3 |
| Horn missing |1.7.1| | 3 |
| Front Drive chain sprocket worn to excess |6.2.1e| | 3 |
| Front Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 2 |
| Horn not working |7.7 |a| |ii|| | 2 |
| Headlamp aim headlamp deteriorated and function impaired |1.2.3a| | 2 |
| Front Headlamp at least one does not illuminate on dipped beam |1.2.2a|i|| | 2 |
| Rear Front wheel bearings have excessive free play |2.3.5b| | 2 |
| Stop lamp remains on when the brakes are released | 2 |
| Rear Rear wheel bearings have excessive free play |2.4.A.2c| | 2 |
| Drive chain excessively tight (6.1.7 (k) (i)) | 2 |
| Offside Front shock absorber seal failed and leaking oil |2.3.3| | 2 |
| Riders seat insecure |6.2.1a| | 2 |
| Stop lamp remains on when the brake is released |1.3.1e| | 2 |
| Nearside Handlebar handgrip not secure to handlebars. |2.1.1c| | 2 |
| Front wheel bearings are excessively rough |2.3.5b| | 2 |
| Front Front position lamp does not illuminate immediately when switched on |1.1.3a| | 2 |
| Fuel system component leaking |7.2.1a| | 2 |
| Front Floor brake test indicates a binding brake |3.3.C2c| | 2 |
| Drive chain excessively tight |6.2.1d| | 2 |
| Headlamp not working on main beam |4.1.1 |a| |ii|| | 1 |
| Stop lamp missing (4.3.1 (a) (ii)) | 1 |
| Horn not working (7.7 (a)) | 1 |
| Rear Stop lamp not working (4.3.1 (a) (ii)) | 1 |
| Rear Drive chain sprocket excessively loose (6.1.7 (c) (i)) | 1 |
| Central Front Upper Headlamp not working on dipped beam (4.1.1 (a) (ii)) | 1 |
| Nearside Front Shock absorber has a serious fluid leak (5.3.2 (b)) | 1 |
| Front Headlamp not working on dipped beam (4.1.1 (a) (ii)) | 1 |
| Headlamp not working on main beam (4.1.1 (a) (ii)) | 1 |
| Front Wheel bearing so rough it is likely to overheat or break up (5.1.3 (b) (ii)) | 1 |
| Stop lamp insecure |1.3.3b| | 1 |
| Rear position lamp insecure |1.1.1c| | 1 |
| Rear Wheel spoke excessively loose 4 loose spokes on left hand side of wheel. (5.2.2 (d)) | 1 |
| Horn not working (7.7 (a) (ii)) | 1 |
| Rear Rear reflector on motorcycle missing (1.4.1) | 1 |
| Throttle operating incorrectly (6.2.1f) | 1 |
| Headlamp at least one does not illuminate on main beam (1.2.2a(ii)) | 1 |
| Nearside Front wheel bearings have excessive free play |2.3.5b| | 1 |
| Offside Front wheel bearings have excessive free play |2.3.5b| | 1 |
| Stop lamp affected by the operation of another lamp |1.3.2| | 1 |
| Steering headbearing has excessive wear or free play (2.2.2 (f) (i)) | 1 |
| Front Horn not working |1.7.3a| | 1 |
| Front Direction indicator not working |1.5.1c| | 1 |
| Rear Direction indicator not working |1.5.1c| | 1 |
| Fuel system component leaking |6.1.3 |b| |i|| | 1 |
| Drive chain excessively tight |6.1.7 |k| |i|| | 1 |
| Rear Brake fluid contaminated |1.8 |a|| | 1 |
| Headlamp light intensity severely reduced on high beam (4.1.4 (a)) | 1 |
| Front Wheel bearing has excessive play (5.1.3 (a) (i)) | 1 |
| Front Wheel bearing rough when rotated (5.1.3 (b) (i)) | 1 |
| Rear Brake excessively binding (1.2.1 (f)) | 1 |
| Rear wheel rotation likely to be impeded |6.2.1b| | 1 |
| Wheel alignment incorrect which adversely affects the handling |2.5.1| | 1 |
| Roller brake test The less effective brake control does not achieve an efficiency of 25% (1.2.2 (a) (i)) | 1 |
| Front Brake lever has inadequate reserve travel |3.1.3b| | 1 |
| Nearside Front shock absorber seal failed and leaking oil |2.3.3| | 1 |
| Rear position lamp does not illuminate immediately when it is switched on |1.1.3a| | 1 |
| Rear Wheel bearing has excessive play (5.1.3 (a) (i)) | 1 |
| Front Horn replaced by a bell |1.7.3b| | 1 |
| Stop lamp not working on both hand and foot brake controls (4.3.1 (a) (ii)) | 1 |
| Lower Rear mono-shock pivot excessively worn |2.4.B.4| | 1 |
| Locking device|s| not correctly fitted which may make the motor bicycle dangerous to ride drive chain circlip direction |6.2.1h| | 1 |
| Horn sound not in accordance with requirements works but not loud enough (7.7 (c)) | 1 |
| Drive chain excessively tight to tight (6.1.7 (k) (i)) | 1 |
| Headlamp not working on dipped beam dip beam inop (4.1.1 (a) (ii)) | 1 |
| Rear reflector missing rear reflector missing (4.8.2 (a) (ii)) | 1 |
| Riders seat insecure (6.2.5 (a) (ii)) | 1 |
| Rear Position lamp not working (4.2.1 (a)) | 1 |
| Stop lamp not working (4.3.1 (a) (ii)) | 1 |
| Rear Brake disc|s| securing bolt|s| missing |3.2.A1g| | 1 |
| Rear Wheel alignment incorrect which adversely affects the steering |2.5.1| | 1 |
| Front Roller brake test indicates excessive fluctuation of brake effort over 50% variation |3.3.A1d| | 1 |
| Steering operation restricted in free movement from lock to lock (2.1.4 (c)) | 1 |
| Rear Wheel spoke excessively loose |4.2.1b| | 1 |
| Front Direction indicators not working |1.5.1c| | 1 |
| Rear Direction indicators not working |1.5.1c| | 1 |
| Rear Drive chain worn to excess |6.2.1e| | 1 |
| Rear Drive chain sprocket worn to excess |6.2.1e| | 1 |
| Rear Roller brake test indicates brake effort fall disproportional to brake lever or pedal effort |3.3.A1c| | 1 |
| Roller brake test No brake control achieves an efficiency of 30%. |3.3.A2a| | 1 |
| Roller brake test Neither brake control achieves an efficiency of 25% |3.3.A2b| | 1 |
| Front Wheel bearing rough when rotated |5.1.3 |b| |i|| | 1 |
| Front Wheel bearing has excessive play |5.1.3 |a| |i|| | 1 |
| Rear Suspension component pin or bush excessively worn Lower shock pivot |5.3.4 |a| |i|| | 1 |
| Front Front wheel bearings are excessively rough |2.3.5b| | 1 |
| Direction indicator missing |1.5.1a| | 1 |
| Front Roller brake test indicates excessive fluctuation of brake effort |3.3.A1d| | 1 |
| Nearside Rear Direction indicator not working |1.5.1c| | 1 |
| Fuel system component leaking carb (6.1.3 (b) (i)) | 1 |
| Front Brake indicates excessive fluctuation of brake effort (1.2.1 (e)) | 1 |
| All direction indicators missing (4.4.1 (a) (ii)) | 1 |
| Steering lock stop missing |2.1.3| | 1 |
| Drive chain excessively loose |6.1.7 |c| |i|| | 1 |
| Rear Rear wheel spindle loose |2.4.A.2b| | 1 |
| Rear wheel spindle loose |2.4.A.2b| | 1 |
| Steering operation fouling on the fuel tank or bodywork on full lock (2.1.4 (b)) | 1 |
| Front Brake disc insecure (1.1.14 (a) (ii)) | 1 |
| Front Stop lamp not working (4.3.1 (a) (ii)) | 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 |
| Horn not working horn missing. (7.7 (a)) | 1 |
| Front Stop lamp remains on when the brake is released |1.3.1e| | 1 |
| Position lamp switch faulty |1.1.4a| | 1 |
| Headlamp dipped beam affected by the operation of another lamp |1.2.2c| | 1 |
| Headlamp main beam affected by the operation of another lamp |1.2.2c| | 1 |