| Most common failures | No# failures |
|---|
| Headlamp aim out of alignment | 66 |
| Registration plate issues | 42 |
| Rear reflector on motorcycle missing |1.4.1| | 36 |
| Rear reflector missing (4.8.2 (a) (ii)) | 19 |
| Registration plate lamp issues | 15 |
| Front Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 14 |
| Drive chain excessively loose |6.2.1d| | 14 |
| Rear Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 12 |
| Nearside Handlebar handgrip not secure to handlebars. |2.1.1c| | 9 |
| Front Stop lamp not working (4.3.1 (a) (ii)) | 8 |
| Rear reflector missing |4.8.2 |a| |ii|| | 7 |
| Rear Rear reflector on motorcycle missing |1.4.1| | 7 |
| 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)) | 7 |
| Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 7 |
| Stop lamp remains on when the brakes are released | 6 |
| Front Stop lamp not working |4.3.1 |a| |ii|| | 5 |
| Headlamp at least one does not illuminate on dipped beam |1.2.2a|i|| | 5 |
| Drive chain excessively loose (6.1.7 (c) (i)) | 5 |
| Front Steering headbearing excessively stiff or notchy (2.2.2 (f) (i)) | 4 |
| Rear Wheel bearing has excessive play (5.1.3 (a) (i)) | 4 |
| Horn not working |1.7.3a| | 4 |
| 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|| | 4 |
| Headlamp not working on main beam (4.1.1 (a) (ii)) | 4 |
| Nearside Front Shock absorber has a serious fluid leak (5.3.2 (b)) | 3 |
| Front Valve stem seriously damaged (5.2.3 (j)) | 3 |
| Front Brake excessively binding (1.2.1 (f)) | 3 |
| Steering movement excessively `notchy` with the wheel raised |2.2.1b| | 3 |
| Stop lamp not working |4.3.1 |a| |ii|| | 3 |
| Rear Valve stem seriously damaged (5.2.3 (j)) | 3 |
| Rear Stop lamp not working (4.3.1 (a) (ii)) | 3 |
| Nearside Rear Footrest missing |6.2.1a| | 3 |
| Offside Rear Footrest missing |6.2.1a| | 3 |
| Handlebar deformed |2.1.1b| | 3 |
| Drive chain excessively loose |6.1.7 |c| |i|| | 3 |
| Rear Rear wheel bearings have excessive free play |2.4.A.2c| | 3 |
| Throttle control functioning such that safe operation of the motorcycle is adversely affected (6.2.7 (a) (ii)) | 3 |
| Front Headlamp not working on dipped beam |4.1.1 |a| |ii|| | 2 |
| Headlamp not working on dipped beam (4.1.1 (a) (ii)) | 2 |
| Roller brake test The less effective brake control does not achieve an efficiency of 25% (1.2.2 (a) (i)) | 2 |
| Rear Direction indicator incorrect colour |1.5.1b| | 2 |
| Rear reflector on sidecar missing |1.4.1| | 2 |
| Rear position lamp adversely affected by the operation of another lamp |1.1.3b| | 2 |
| Rear wheel bearings have excessive free play |2.4.A.2c| | 2 |
| Drive chain excessively tight |6.2.1d| | 2 |
| Throttle operating incorrectly |6.2.1f| | 2 |
| Steering headbearing excessively stiff or notchy (2.2.2 (f) (i)) | 2 |
| Headlamp at least one does not illuminate on main beam |1.2.2a|ii|| | 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 |
| Direction indicators not working |1.5.1c| | 2 |
| Drive chain worn to excess (6.1.7 (c) (i)) | 2 |
| Rear Rear reflector missing (4.8.2 (a) (ii)) | 2 |
| Rear Rear reflector missing |4.8.2 |a| |ii|| | 2 |
| Nearside Front Direction indicator not working (4.4.1 (a) (ii)) | 2 |
| Rear Wheel bearing has excessive play |5.1.3 |a| |i|| | 2 |
| Rear Valve stem seriously damaged |5.2.3 |j|| | 2 |
| Drive chain so loose it is likely to fail (6.1.7 (c) (ii)) | 2 |
| Front Wheel bearing has excessive play (5.1.3 (a) (i)) | 2 |
| Steering headbearing has excessive wear or free play (2.2.2 (f) (i)) | 2 |
| Rear Drive chain so loose it is likely to fail (6.1.7 (c) (ii)) | 2 |
| Horn not working (7.7 (a) (ii)) | 2 |
| Front Headlamp not working on main beam (4.1.1 (a) (ii)) | 2 |
| Stop lamp not working (4.3.1 (a) (ii)) | 2 |
| Nearside Front Shock absorber has a serious fluid leak |5.3.2 |b|| | 2 |
| Front Horn not working (7.7 (a) (ii)) | 2 |