| Most common failures | No# failures |
|---|
| Headlamp aim out of alignment | 127 |
| Registration plate issues | 65 |
| Registration plate lamp issues | 37 |
| Offside Rear Direction indicator not working (4.4.1 (a) (ii)) | 36 |
| Stop lamp remains on when the brakes are released | 33 |
| Rear Position lamp not working (4.2.1 (a)) | 29 |
| Front Brake excessively binding (1.2.1 (f)) | 27 |
| Headlamp not working on dipped beam (4.1.1 (a) (ii)) | 23 |
| Nearside Rear Direction indicator not working (4.4.1 (a) (ii)) | 21 |
| Steering headbearing excessively stiff or notchy (2.2.2 (f) (i)) | 18 |
| Rear Position lamp not working |4.2.1 |a|| | 13 |
| Front Stop lamp not working (4.3.1 (a) (ii)) | 13 |
| Rear reflector missing (4.8.2 (a) (ii)) | 13 |
| Exhaust has a major leak of exhaust gases |6.1.2 |a|| | 11 |
| Rear Brake lever has insufficient reserve travel |1.1.2 |a|| | 11 |
| Headlamp not working on main beam (4.1.1 (a) (ii)) | 11 |
| Rear Stop lamp not working (4.3.1 (a) (ii)) | 11 |
| Exhaust has a major leak of exhaust gases (6.1.2 (a)) | 11 |
| Headlamp not working on dipped beam |4.1.1 |a| |ii|| | 9 |
| Front Brake excessively binding |1.2.1 |f|| | 9 |
| Engine mounting/bracket damaged or deteriorated resulting in excessive movement (6.1.8 (a) (i)) | 9 |
| Stop lamp not working (4.3.1 (a) (ii)) | 8 |
| Rear reflector missing |4.8.2 |a| |ii|| | 7 |
| Rear Wheel bearing has excessive play (5.1.3 (a) (i)) | 7 |
| Rear Rear reflector missing (4.8.2 (a) (ii)) | 7 |
| Front Shock absorber has negligible damping effect (5.3.2 (b)) | 7 |
| Headlamp at least one does not illuminate on dipped beam |1.2.2a|i|| | 6 |
| Horn not working |7.7 |a| |ii|| | 6 |
| Rear Stop lamp not working |4.3.1 |a| |ii|| | 6 |
| Offside Rear Direction indicator not working |4.4.1 |a| |ii|| | 6 |
| Offside Rear All direction indicators not working (4.4.1 (a) (ii)) | 6 |
| Roller brake test The less effective brake control does not achieve an efficiency of 25% (1.2.2 (a) (i)) | 6 |
| Nearside Rear Direction indicator not working |4.4.1 |a| |ii|| | 5 |
| Headlamp not working on main beam |4.1.1 |a| |ii|| | 5 |
| Stop lamp not working |4.3.1 |a| |ii|| | 5 |
| Rear Brake lever has insufficient reserve travel (1.1.2 (a)) | 5 |
| 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)) | 5 |
| Horn not working (7.7 (a) (ii)) | 5 |
| Riders seat insecure (6.2.5 (a) (ii)) | 5 |
| Nearside Handlebar grip insecure to handlebar (2.2.1 (d) (ii)) | 5 |
| Headlamp aim not tested (4.1.2 (b)) | 5 |
| Rear Brake indicates excessive fluctuation of brake effort (1.2.1 (e)) | 5 |
| Horn not working (7.7 (a)) | 5 |
| Front Steering headbearing excessively stiff or notchy |2.2.2 |f| |i|| | 4 |
| Front Roller brake test indicates a binding brake |3.3.A1a| | 4 |
| Rear position lamp does not illuminate immediately when it is switched on |1.1.3a| | 4 |
| Rear Valve stem seriously damaged (5.2.3 (j)) | 4 |
| Front Headlamp not working on dipped beam (4.1.1 (a) (ii)) | 4 |
| Front Position lamp not working (4.2.1 (a)) | 4 |
| Throttle operating incorrectly (6.2.7 (a) (i)) | 4 |
| Stop lamp does not illuminate by the operation of both brake controls (4.3.2 (a) (iii)) | 4 |
| Horn sound not in accordance with requirements (7.7 (c)) | 4 |
| Steering movement excessively `notchy` with the wheel raised |2.2.1b| | 3 |
| Exhaust is leaking and excessively noisey |7.1.1b| | 3 |
| Nearside Rear Direction indicator not working |1.5.1c| | 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 |
| Steering headbearing has excessive wear or free play |2.2.2 |f| |i|| | 3 |
| Front Headlamp not working on dipped beam |4.1.1 |a| |ii|| | 3 |
| Engine mounting/bracket excessively loose |6.1.8 |a| |ii|| | 3 |
| Rear Wheel fixing loose |single fixing| |5.2.1 |a| |ii|| | 3 |
| Steering headbearing excessively stiff or notchy |2.2.2 |f| |i|| | 3 |
| Steering headbearing in such a condition that steering control is adversely affected |2.2.2 |f| |ii|| | 3 |
| Engine mounting/bracket damaged or deteriorated resulting in excessive movement |6.1.8 |a| |i|| | 3 |
| Front Exhaust has a major leak of exhaust gases (6.1.2 (a)) | 3 |
| Rear Suspension component pin or bush excessively worn (5.3.4 (a) (i)) | 3 |
| Front Horn not working (7.7 (a) (ii)) | 3 |
| Front Wheel bearing has excessive play (5.1.3 (a) (i)) | 3 |
| Rear Brake lining(s) less than 1.0 mm thick (1.1.13 (a)) | 3 |
| Rear Shock absorber has a serious fluid leak (5.3.2 (b)) | 3 |
| Front Steering headbearing excessively stiff or notchy (2.2.2 (f) (i)) | 3 |
| Rear Stop lamp does not illuminate by the operation of both brake controls (4.3.2 (a) (iii)) | 3 |
| Rear Shock absorber has negligible damping effect (5.3.2 (b)) | 3 |
| Steering headbearing has excessive wear or free play (2.2.2 (f) (i)) | 3 |
| Steering headbearing in such a condition that steering control is adversely affected (2.2.2 (f) (ii)) | 3 |
| Front Stop lamp does not illuminate by the operation of both brake controls (4.3.2 (a) (iii)) | 3 |