| Most common failures | No# failures |
|---|
| Headlamp aim out of alignment | 89 |
| Registration plate issues | 55 |
| Rear reflector on motorcycle missing |1.4.1| | 54 |
| Rear reflector missing (4.8.2 (a) (ii)) | 33 |
| Rear reflector missing |4.8.2 |a| |ii|| | 32 |
| Registration plate lamp issues | 19 |
| Rear Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 14 |
| Steering headbearing excessively stiff or notchy (2.2.2 (f) (i)) | 10 |
| Rear Stop lamp not working |4.3.1 |a| |ii|| | 10 |
| Steering movement excessively `notchy` with the wheel raised |2.2.1b| | 10 |
| Rear Rear reflector missing (4.8.2 (a) (ii)) | 8 |
| Horn not working (7.7 (a) (ii)) | 8 |
| Rear Stop lamp not working (4.3.1 (a) (ii)) | 8 |
| Horn not working |1.7.3a| | 6 |
| Front Brake indicates excessive fluctuation of brake effort (1.2.1 (e)) | 6 |
| Horn not working (7.7 (a)) | 6 |
| Rear Rear reflector on motorcycle missing |1.4.1| | 5 |
| Front Brake excessively binding (1.2.1 (f)) | 5 |
| Front Brake excessively binding |1.2.1 |f|| | 5 |
| Drive chain excessively loose (6.1.7 (c) (i)) | 5 |
| Front Steering headbearing excessively stiff or notchy (2.2.2 (f) (i)) | 4 |
| Horn not working |7.7 |a| |ii|| | 4 |
| Stop lamp not working (4.3.1 (a) (ii)) | 4 |
| Rear Stop lamp does not illuminate by the operation of both brake controls (4.3.2 (a) (iii)) | 3 |
| 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)) | 3 |
| Headlamp at least one does not illuminate on dipped beam |1.2.2a|i|| | 3 |
| Stop lamp remains on when the brakes are released | 3 |
| Front Stop lamp not working (4.3.1 (a) (ii)) | 3 |
| Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 3 |
| Front Roller brake test indicates a binding brake |3.3.A1a| | 3 |
| Headlamp not working on dipped beam (4.1.1 (a) (ii)) | 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|| | 2 |
| 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| | 2 |
| Rear Brake indicates excessive fluctuation of brake effort (1.2.1 (e)) | 2 |
| Offside Rear Direction indicator not working (4.4.1 (a) (ii)) | 2 |
| Throttle control functioning such that safe operation of the motorcycle is adversely affected (6.2.7 (a) (ii)) | 2 |
| Central Rear Rear reflector on motorcycle missing |1.4.1| | 2 |
| Rear Stop lamp does not illuminate immediately a brake applies foot brake |1.3.1a| | 2 |
| Rear Position lamp not working (4.2.1 (a)) | 2 |
| Offside Front Direction indicator not working |4.4.1 |a| |ii|| | 2 |
| Nearside Rear Direction indicator incorrect colour (4.4.3 (a)) | 2 |
| Steering movement excessively `notchy` with the weight on the lower bearing |2.2.1a| | 2 |
| Rear Rear reflector missing |4.8.2 |a| |ii|| | 2 |
| Rear Footrest missing (6.2.12 (a)) | 2 |
| Drive chain excessively loose |6.2.1d| | 2 |
| Drive chain worn to excess |6.1.7 |c| |i|| | 2 |
| Drive chain excessively tight, so that it is likely to fail (6.1.7 (k) (ii)) | 2 |
| All direction indicators not working (4.4.1 (a) (ii)) | 2 |
| Rear Footrest missing |6.2.1a| | 2 |
| Drive chain worn to excess |6.2.1e| | 2 |
| Nearside Rear Footrest missing (6.2.12 (a)) | 2 |
| Offside Rear Footrest missing (6.2.12 (a)) | 2 |
| Drive chain worn to excess (6.1.7 (c) (i)) | 2 |
| Front Stop lamp not working |4.3.1 |a| |ii|| | 2 |
| Stop lamp does not emit a steady light |1.3.1b| | 2 |
| Front Floor brake test indicates a binding brake |3.3.C2c| | 2 |
| Front Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 2 |
| Nearside Front Shock absorber has a serious fluid leak (5.3.2 (b)) | 2 |