| Most common failures | No# failures |
|---|
| Headlamp aim out of alignment | 115 |
| Rear reflector missing (4.8.2 (a) (ii)) | 52 |
| Rear reflector missing |4.8.2 |a| |ii|| | 51 |
| Registration plate issues | 49 |
| Registration plate lamp issues | 43 |
| Rear reflector on motorcycle missing |1.4.1| | 17 |
| Steering headbearing excessively stiff or notchy (2.2.2 (f) (i)) | 16 |
| Horn not working (7.7 (a) (ii)) | 15 |
| Front Stop lamp not working (4.3.1 (a) (ii)) | 14 |
| Front Brake excessively binding (1.2.1 (f)) | 14 |
| Rear Rear reflector missing (4.8.2 (a) (ii)) | 13 |
| Front Brake excessively binding |1.2.1 |f|| | 12 |
| Horn not working |7.7 |a| |ii|| | 11 |
| Rear Stop lamp not working |4.3.1 |a| |ii|| | 8 |
| Rear Rear reflector missing |4.8.2 |a| |ii|| | 8 |
| Steering headbearing excessively stiff or notchy |2.2.2 |f| |i|| | 8 |
| Horn not working (7.7 (a)) | 8 |
| Rear Stop lamp not working (4.3.1 (a) (ii)) | 7 |
| Drive chain excessively loose (6.1.7 (c) (i)) | 6 |
| Stop lamp not working (4.3.1 (a) (ii)) | 6 |
| Steering movement excessively `notchy` with the wheel raised |2.2.1b| | 5 |
| Drive chain excessively loose |6.1.7 |c| |i|| | 5 |
| Front Stop lamp does not illuminate by the operation of both brake controls (4.3.2 (a) (iii)) | 5 |
| Front Roller brake test indicates a binding brake |3.3.A1a| | 4 |
| Rear Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 4 |
| Headlamp not working on dipped beam (4.1.1 (a) (ii)) | 4 |
| Central Rear Rear reflector missing |4.8.2 |a| |ii|| | 4 |
| 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 |
| Front Brake indicates excessive fluctuation of brake effort (1.2.1 (e)) | 3 |
| Front Stop lamp not working |4.3.1 |a| |ii|| | 3 |
| Rear Brake indicates excessive fluctuation of brake effort (1.2.1 (e)) | 3 |
| Rear Stop lamp does not illuminate by the operation of both brake controls (4.3.2 (a) (iii)) | 3 |
| Nearside Handlebar grip insecure to handlebar (2.2.1 (d) (ii)) | 3 |
| Drive chain so loose it is likely to fail (6.1.7 (c) (ii)) | 3 |
| Rear Exhaust has a major leak of exhaust gases (6.1.2 (a)) | 2 |
| Front Steering headbearing excessively stiff or notchy (2.2.2 (f) (i)) | 2 |
| Roller brake test The less effective brake control does not achieve an efficiency of 25% (1.2.2 (a) (i)) | 2 |
| Rear Drive chain excessively tight (6.1.7 (k) (i)) | 2 |
| Headlamp aim not tested (4.1.2 (b)) | 2 |
| Headlamp not working on main beam (4.1.1 (a) (ii)) | 2 |
| Central Rear Rear reflector missing (4.8.2 (a) (ii)) | 2 |
| Nearside Handlebar grip insecure to handlebar |2.2.1 |d| |ii|| | 2 |
| Rear Drive chain excessively loose (6.1.7 (c) (i)) | 2 |
| Offside Front Shock absorber has a serious fluid leak (5.3.2 (b)) | 2 |
| Front Stop lamp switch with a delay in operation (4.3.2 (a) (ii)) | 2 |
| Steering headbearing in such a condition that steering control is adversely affected |2.2.2 |f| |ii|| | 2 |
| Front Brake indicates excessive fluctuation of brake effort |1.2.1 |e|| | 2 |
| Riders seat insecure (6.2.5 (a) (ii)) | 2 |
| Front Steering headbearing has excessive wear or free play |2.2.2 |f| |i|| | 2 |
| Throttle control functioning such that safe operation of the motorcycle is adversely affected (6.2.7 (a) (ii)) | 2 |
| Front Horn not working |7.7 |a| |ii|| | 2 |
| Steering movement excessively `notchy` with the weight on the lower bearing |2.2.1a| | 2 |
| Rear Footrest missing |6.2.1a| | 2 |
| Drive chain so worn it is likely to fail (6.1.7 (c) (ii)) | 2 |
| Drive chain so loose it is likely to fail |6.1.7 |c| |ii|| | 2 |
| Central Rear Upper Rear reflector missing (4.8.2 (a) (ii)) | 2 |
| Nearside Rear Direction indicator not working (4.4.1 (a) (ii)) | 2 |
| Drive chain excessively tight |6.2.1d| | 2 |
| Headlamp aim so that beam "kick up" is not visible on the screen |4.1.2 |a|| | 2 |
| Nearside Front Direction indicator not working |4.4.1 |a| |ii|| | 2 |