| Most common failures | No# failures |
|---|
| Headlamp aim out of alignment | 69 |
| Registration plate issues | 57 |
| Registration plate lamp issues | 46 |
| Rear reflector on motorcycle missing |1.4.1| | 46 |
| Rear reflector missing (4.8.2 (a) (ii)) | 32 |
| Horn not working (7.7 (a)) | 32 |
| Horn not working |1.7.3a| | 21 |
| Offside Front Shock absorber has a serious fluid leak (5.3.2 (b)) | 15 |
| Offside Rear Direction indicator not working (4.4.1 (a) (ii)) | 13 |
| Nearside Front Shock absorber has a serious fluid leak (5.3.2 (b)) | 10 |
| Drive chain excessively loose |6.2.1d| | 10 |
| Front Valve stem seriously damaged (5.2.3 (j)) | 8 |
| Roller brake test The less effective brake control does not achieve an efficiency of 25% (1.2.2 (a) (i)) | 8 |
| Nearside Rear Direction indicator not working (4.4.1 (a) (ii)) | 8 |
| 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)) | 8 |
| Rear Wheel bearing has excessive play (5.1.3 (a) (i)) | 7 |
| Rear wheel bearings have excessive free play |2.4.A.2c| | 7 |
| Rear Stop lamp not working (4.3.1 (a) (ii)) | 7 |
| Headlamp not working on dipped beam (4.1.1 (a) (ii)) | 6 |
| Drive chain excessively loose (6.1.7 (c) (i)) | 6 |
| Offside Front Footrest insecure (6.2.12 (a)) | 6 |
| Rear Rear reflector missing (4.8.2 (a) (ii)) | 6 |
| Headlamp aim projected beam image obviously incorrect (4.1.2 (c)) | 6 |
| Rear Rear reflector on motorcycle missing |1.4.1| | 6 |
| Rear position lamp adversely affected by the operation of another lamp |1.1.3b| | 5 |
| Drive chain excessively tight (6.1.7 (k) (i)) | 5 |
| Drive chain worn to excess (6.1.7 (c) (i)) | 5 |
| Rear Valve stem seriously damaged (5.2.3 (j)) | 5 |
| Nearside Front Direction indicator not working (4.4.1 (a) (ii)) | 5 |
| Nearside Rear Direction indicator not working |1.5.1c| | 5 |
| Nearside Handlebar grip insecure to handlebar (2.2.1 (d) (ii)) | 5 |
| Rear Brake has no recorded effort at a wheel (1.2.1 (a) (ii)) | 4 |
| Headlamp not working on main beam (4.1.1 (a) (ii)) | 4 |
| Headlamp aim beam image kick up to the offside |1.6| | 4 |
| Stop lamp does not illuminate by the operation of both brake controls (4.3.2 (a) (iii)) | 4 |
| Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 4 |
| Steering headbearing excessively stiff or notchy (2.2.2 (f) (i)) | 4 |
| Front Shock absorber has a serious fluid leak (5.3.2 (b)) | 4 |
| Offside Front Brake disc contaminated (1.1.14 (b)) | 4 |
| Rear Direction indicator obviously incorrectly positioned (4.4.3 (a)) | 4 |
| Front Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 4 |
| Direction indicators flashing more than 120 times per minute |1.5.1c| | 3 |
| Front Stop lamp not working (4.3.1 (a) (ii)) | 3 |
| Front Horn not working (7.7 (a)) | 3 |
| Drive chain so loose it is likely to fail (6.1.7 (c) (ii)) | 3 |
| Front position lamp does not illuminate immediately when switched on |1.1.3a| | 3 |
| Offside Front Direction indicator not working (4.4.1 (a) (ii)) | 3 |
| Rear Position lamp adversely affected by the operation of another lamp (4.2.3 (b)) | 3 |
| Stop lamp not working (4.3.1 (a) (ii)) | 3 |
| Front Brake indicates excessive fluctuation of brake effort (1.2.1 (e)) | 3 |
| 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| | 3 |
| Front Position lamp not working (4.2.1 (a)) | 3 |
| Rear Rear wheel bearings have excessive free play |2.4.A.2c| | 3 |
| Headlamp at least one does not illuminate on dipped beam |1.2.2a|i|| | 3 |
| Stop lamp affected by the operation of another lamp |1.3.2| | 2 |
| Offside Front shock absorber seal failed and leaking oil |2.3.3| | 2 |
| Offside Front Position lamp not working (4.2.1 (a)) | 2 |
| Headlamp aim unable to be tested (4.1.2 (b)) | 2 |
| Rear Brake disc significantly and obviously worn (1.1.14 (a) (i)) | 2 |
| Rear Brake pedal has inadequate reserve travel |3.1.3b| | 2 |
| Nearside Front Position lamp not working (4.2.1 (a)) | 2 |
| Horn not loud enough to be heard by another road user |1.7.3a| | 2 |
| Rear Hydraulic brake control feels spongy |3.1.4a| | 2 |
| Rear Roller brake test indicates brake effort rise disproportional to brake lever or pedal effort |3.3.A1c| | 2 |
| Front Wheel bearing rough when rotated (5.1.3 (b) (i)) | 2 |
| Offside Rear Direction indicators not working |1.5.1c| | 2 |
| Rear Stop lamp does not illuminate by the operation of both brake controls (4.3.2 (a) (iii)) | 2 |
| Throttle has a significant change in engine speed whilst moving the steering from lock to lock |2.1.4| | 2 |
| Drive chain excessively loose |6.1.7 |c| |i|| | 2 |
| Headlamp light intensity severely reduced (4.1.4 (a)) | 2 |
| Rear Brake effort inadequate at a wheel (1.2.1 (a) (i)) | 2 |
| Nearside Handlebar handgrip not secure to handlebars. |2.1.1c| | 2 |
| Front Roller brake test indicates a binding brake |3.3.A1a| | 2 |
| Rear suspension bearing has excessive free play |2.4.A2a|i|| | 2 |
| Exhaust is leaking and excessively noisey |7.1.1b| | 2 |
| Front Brake disc contaminated (1.1.14 (b)) | 2 |
| Rear Wheel bearing rough when rotated (5.1.3 (b) (i)) | 2 |
| Rear Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 2 |
| Front Wheel bearing has excessive play (5.1.3 (a) (i)) | 2 |
| Nearside Front Direction indicators not working |1.5.1c| | 2 |
| Rear Headlamp reflector missing (4.1.1 (b) (ii)) | 2 |
| Drive chain worn to excess |6.2.1e| | 2 |
| Drive chain excessively tight |6.2.1d| | 2 |
| Rear Wheel bearing play so excessive it is likely to break up (5.1.3 (a) (ii)) | 2 |
| Steering operation restricted in free movement from lock to lock (2.1.4 (c)) | 2 |
| Front Headlamp not working on dipped beam (4.1.1 (a) (ii)) | 2 |
| Front Brake excessively binding (1.2.1 (f)) | 2 |
| Rear Drive chain sprocket worn to excess |6.2.1e| | 2 |
| Front Horn not working |1.7.3a| | 2 |
| Nearside Front shock absorber seal failed and leaking oil |2.3.3| | 2 |
| Offside Rear Direction indicator incorrect colour |1.5.1b| | 2 |
| Headlamp at least one does not illuminate on main beam |1.2.2a|ii|| | 2 |
| Nearside Rear Direction indicator incorrect colour |1.5.1b| | 2 |
| Centre Rear Upper Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 2 |
| Rear Suspension arm pin or bush excessively worn (5.3.4 (a) (i)) | 2 |
| Rear Stop lamp remains on when the brake is released |1.3.1e| | 2 |
| Nearside Rear Exhaust silencer likely to become detached (8.1.1 (b) (ii)) | 2 |
| Horn sound not in accordance with requirements (7.7 (c)) | 2 |
| Roller brake test The less effective brake control does not achieve an efficiency of 25%. |3.3.A2b| | 2 |