| Most common failures | No# failures |
|---|
| Registration plate issues | 43 |
| Rear reflector missing (4.8.2 (a) (ii)) | 30 |
| Rear reflector on motorcycle missing |1.4.1| | 23 |
| Headlamp aim out of alignment | 12 |
| Rear reflector missing |4.8.2 |a| |ii|| | 10 |
| Registration plate lamp issues | 10 |
| Horn not working |1.7.3a| | 9 |
| Rear Wheel bearing has excessive play (5.1.3 (a) (i)) | 8 |
| Headlamp at least one does not illuminate on dipped beam |1.2.2a|i|| | 7 |
| Horn not working (7.7 (a) (ii)) | 6 |
| Horn missing |1.7.1| | 5 |
| Front Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 5 |
| Front Wheel bearing has excessive play (5.1.3 (a) (i)) | 5 |
| Front Brake lever has insufficient reserve travel (1.1.2 (a)) | 5 |
| Stop lamp remains on when the brake is released |1.3.1e| | 4 |
| Rear wheel bearings have excessive free play |2.4.A.2c| | 4 |
| Stop lamp remains on when the brakes are released | 4 |
| Front Stop lamp not working (4.3.1 (a) (ii)) | 4 |
| Front Wheel bearing rough when rotated (5.1.3 (b) (i)) | 4 |
| Rear Wheel spoke excessively loose |4.2.1b| | 3 |
| Rear Rear reflector on motorcycle missing |1.4.1| | 3 |
| Rear Wheel bearing has excessive play |5.1.3 |a| |i|| | 3 |
| Horn not working |7.7 |a| |ii|| | 3 |
| Headlamp at least one does not illuminate on main beam |1.2.2a|ii|| | 3 |
| Rear Position lamp not working (4.2.1 (a)) | 3 |
| Stop lamp not working (4.3.1 (a) (ii)) | 3 |
| Drive chain excessively tight (6.1.7 (k) (i)) | 3 |
| Front shock absorber seal failed and leaking oil both |2.3.3| | 2 |
| Horn not loud enough to be heard by another road user |1.7.3a| | 2 |
| Rear Rear reflector missing |4.8.2 |a| |ii|| | 2 |
| Front Stop lamp not working |4.3.1 |a| |ii|| | 2 |
| Front wheel bearings have excessive free play |2.3.5b| | 2 |
| Offside Front shock absorber seal failed and leaking oil |2.3.3| | 2 |
| Stop lamp does not emit a steady light |1.3.1b| | 2 |
| Rear Wheel spoke excessively loose (5.2.2 (d)) | 2 |
| Drive chain horseshoe locking device incorrectly fitted (6.1.7 (j) (i)) | 2 |
| Rear Rear reflector missing (4.8.2 (a) (ii)) | 2 |
| Headlamp not working on dipped beam (4.1.1 (a) (ii)) | 2 |
| Rear Brake pedal has insufficient reserve travel (1.1.2 (a)) | 2 |
| Roller brake test The less effective brake control does not achieve an efficiency of 25% (1.2.2 (a) (i)) | 2 |
| Exhaust noise is clearly in excess of that emitted by a similar motorcycle fitted with a standard silencer in average condition |8.1.1 |a|| | 1 |
| Steering headbearing has excessive free play |2.2.2| | 1 |
| Rear Brake pedal has insufficient reserve travel |1.1.2 |a|| | 1 |
| Front shock absorber seal failed and leaking oil Both |2.3.3| | 1 |
| Direction indicator missing All |1.5.1a| | 1 |
| Nearside Rear Locking device|s| not correctly fitted which may make the motor bicycle dangerous to ride |6.2.1h| | 1 |
| Front Headlamp at least one does not illuminate on dipped beam |1.2.2a|i|| | 1 |
| Rear Lower Shock absorber has an excessively worn bush |5.3.2 |c|| | 1 |
| Rear Brake disc significantly and obviously worn |1.1.14 |a| |i|| | 1 |
| Headlamp switch faulty |1.2.4| | 1 |
| Rear Brake disc|s| securing bolt|s| loose |3.2.A1g| | 1 |
| Front Headlamp aim not tested |4.1.2 |b|| | 1 |
| Front Headlamp not working on main beam |4.1.1 |a| |ii|| | 1 |
| Rear Rear wheel bearings have excessive free play |2.4.A.2c| | 1 |
| Offside Front Horn not working |7.7 |a| |ii|| | 1 |
| Front Horn control defective |1.7.2a| | 1 |
| Rear Stop lamp emits other than a steady red light |1.3.1b| | 1 |
| Front Headlamp aim not tested |1.6| | 1 |
| Front All position lamps do not illuminate immediately when switched on |1.1.3a| | 1 |
| Front Front position lamp does not illuminate immediately when switched on dipped beam |1.1.3a| | 1 |
| Front Front wheel bearings have excessive free play |2.3.5b| | 1 |
| Central Rear Lower Suspension component ball joint excessively worn |5.3.4 |a| |i|| | 1 |
| Front Brake lining|s| less than 1.0 mm thick |1.1.13 |a|| | 1 |
| Drive chain excessively loose |6.1.7 |c| |i|| | 1 |
| Front Drive chain sprocket worn to excess |6.2.1e| | 1 |
| Rear Drive chain sprocket worn to excess |6.2.1e| | 1 |
| Drive chain excessively loose |6.2.1d| | 1 |
| Rear suspension bearing has excessive free play lower mono shock |2.4.A2a|i|| | 1 |
| Rear Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 1 |
| Nearside Front shock absorber seal failed and leaking oil |2.3.3| | 1 |
| Front Front position lamp does not illuminate immediately when switched on |1.1.3a| | 1 |
| Rear Rear position lamp does not illuminate immediately when it is switched on |1.1.3a| | 1 |
| Direction indicators not working all of them |1.5.1c| | 1 |
| Nearside Rear Wheel spoke cracked |5.2.2 |d|| | 1 |
| Headlamp insecure |1.2.3b| | 1 |
| Rear Stop lamp not working |4.3.1 |a| |ii|| | 1 |
| Rear reflector on motorcycle incorrectly positioned |1.4.2d| | 1 |
| Offside Front Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 1 |
| Rear Position lamp not working |4.2.1 |a|| | 1 |
| Front wheel bearings are excessively rough |2.3.5b| | 1 |
| Drive chain worn to excess |6.2.1e| | 1 |
| Headlamp aim headlamp damaged and function impaired |1.2.3a| | 1 |
| Front Brake lever has abnormal movement of levers indicating excessive wear or maladjustment |1.1.15 |f|| | 1 |
| Brake lever is damaged and the brake cannot be readily applied |3.1.3c| | 1 |
| Headlamp aim not tested |1.6| | 1 |
| Rear position lamp adversely affected by the operation of another lamp |1.1.3b| | 1 |
| Headlamp aim so that beam "kick up" is not visible on the screen |4.1.2 |a|| | 1 |
| Horn control not functioning. |1.7.2b| | 1 |
| Rear Position lamp light intensity significantly reduced |4.2.3 |a| |ii|| | 1 |
| Stop lamp not working rear brake |4.3.1 |a| |ii|| | 1 |
| Rear Wheel bearing rough when rotated |5.1.3 |b| |i|| | 1 |
| Headlamp light source and lamp not compatible |4.1.4 |c|| | 1 |
| Drive chain worn to excess |6.1.7 |c| |i|| | 1 |
| Rear Drive chain sprocket worn to excess |6.1.7 |c| |i|| | 1 |
| Front Drive chain sprocket worn to excess |6.1.7 |c| |i|| | 1 |
| Nearside Shock absorber has a serious fluid leak |5.3.2 |b|| | 1 |
| Offside Shock absorber has a serious fluid leak |5.3.2 |b|| | 1 |
| Nearside Front Shock absorber has a serious fluid leak |5.3.2 |b|| | 1 |
| Steering headbearing excessively stiff or notchy |2.2.2 |f| |i|| | 1 |
| Shock absorber has a serious fluid leak Both fork legs |5.3.2 |b|| | 1 |
| Nearside Shock absorber insecurely attached |5.3.2 |a| |i|| | 1 |
| Horn sound not in accordance with requirements (7.7 (c)) | 1 |
| Front Wheel bearing so rough it is likely to overheat or break up (5.1.3 (b) (ii)) | 1 |
| Rear Brake indicates excessive fluctuation of brake effort (1.2.1 (e)) | 1 |
| Wheel alignment incorrect which adversely affects the handling (2.4 (a)) | 1 |
| Horn not working horn is missing (7.7 (a) (ii)) | 1 |
| Headlamp not working on main beam (4.1.1 (a) (ii)) | 1 |
| Drive chain excessively loose (6.1.7 (c) (i)) | 1 |
| Front Headlamp not working on dipped beam (4.1.1 (a) (ii)) | 1 |
| Rear Stop lamp with a multiple light source more than 1/2 not functioning Stop lamp (LED) intermittent on offside of lens and is clearly dimmer than nearside LED (4.3.1 (a) (ii)) | 1 |
| Rear Stop lamp not working (4.3.1 (a) (ii)) | 1 |
| Rear Wheel more than one fixing loose (5.2.1 (a) (ii)) | 1 |
| Headlamp aim not tested (4.1.2 (b)) | 1 |
| Rear Wheel excessively distorted (5.2.2 (c) (i)) | 1 |
| Front Brake indicates excessive fluctuation of brake effort (1.2.1 (e)) | 1 |
| Rear Suspension component has excessive wear or free play SWINGARM PIVOT BEARINGS (5.3.3 (d)) | 1 |
| Lower Suspension component pin or bush excessively worn lower rear shock bearing (5.3.4 (a) (i)) | 1 |
| Horn not working (7.7 (a)) | 1 |
| Headlamp not working on dipped beam New bulb inserted. (4.1.1 (a) (ii)) | 1 |
| Rear Wheel bearing rough when rotated (5.1.3 (b) (i)) | 1 |
| Drive chain so loose it is likely to fail (6.1.7 (c) (ii)) | 1 |
| Front Drive chain sprocket so worn it is likely to fail (6.1.7 (c) (ii)) | 1 |
| Rear Drive chain so worn it is likely to fail (6.1.7 (c) (ii)) | 1 |
| Front brake disc in such a condition that it is seriously weakened | 1 |
| Nearside Handlebar grip insecure to handlebar (2.2.1 (d) (ii)) | 1 |
| All direction indicators missing (4.4.1 (a) (ii)) | 1 |
| Front Shock absorber has a serious fluid leak (5.3.2 (b)) | 1 |
| Shock absorber has negligible damping effect stiff (5.3.2 (b)) | 1 |
| Rear Wheel spoke excessively loose Several (5.2.2 (d)) | 1 |
| Motorcycle structure has a fracture which is likely to adversely affect braking or steering Spindle block (6.1.1 (a) (ii)) | 1 |
| Front Brake lagging in operation (1.2.1 (d)) | 1 |
| Headlamp aim projected beam image obviously incorrect (4.1.2 (c)) | 1 |