| Most common failures | No# failures |
|---|
| Headlamp aim out of alignment | 294 |
| Headlamp at least one does not illuminate on dipped beam |1.2.2a|i|| | 147 |
| Registration plate issues | 80 |
| Headlamp not working on dipped beam (4.1.1 (a) (ii)) | 64 |
| Headlamp not working on dipped beam |4.1.1 |a| |ii|| | 51 |
| Registration plate lamp issues | 51 |
| Rear Brake lever has inadequate reserve travel |3.1.3b| | 46 |
| Fuel cap sealing washer missing |7.2.2c| | 40 |
| Headlamp at least one does not illuminate on main beam |1.2.2a|ii|| | 40 |
| Stop lamp remains on when the brakes are released | 35 |
| Exhaust is leaking and excessively noisey |7.1.1b| | 28 |
| Riders seat insecure |6.2.1a| | 27 |
| Front Brake excessively binding (1.2.1 (f)) | 26 |
| Rear Brake lever has insufficient reserve travel (1.1.2 (a)) | 24 |
| Front Roller brake test indicates a binding brake |3.3.A1a| | 23 |
| Rear Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 22 |
| Horn not working (7.7 (a) (ii)) | 20 |
| Steering movement excessively `notchy` with the weight on the lower bearing |2.2.1a| | 19 |
| Steering movement excessively `notchy` with the wheel raised |2.2.1b| | 19 |
| Rear Brake lever has insufficient reserve travel |1.1.2 |a|| | 18 |
| Headlamp not working on main beam (4.1.1 (a) (ii)) | 18 |
| Front Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 17 |
| Front Stop lamp not working (4.3.1 (a) (ii)) | 17 |
| Front Headlamp not working on dipped beam (4.1.1 (a) (ii)) | 17 |
| Rear wheel bearings have excessive free play |2.4.A.2c| | 16 |
| Rear Stop lamp not working (4.3.1 (a) (ii)) | 16 |
| Front Headlamp at least one does not illuminate on dipped beam |1.2.2a|i|| | 15 |
| Front Brake excessively binding |1.2.1 |f|| | 15 |
| Stop lamp not working (4.3.1 (a) (ii)) | 15 |
| Rear reflector on motorcycle missing |1.4.1| | 14 |
| Front position lamp does not illuminate immediately when switched on |1.1.3a| | 14 |
| Headlamp not working on main beam |4.1.1 |a| |ii|| | 14 |
| Offside Rear Direction indicator not working (4.4.1 (a) (ii)) | 14 |
| Exhaust has a major leak of exhaust gases (6.1.2 (a)) | 14 |
| Front Shock absorber has negligible damping effect (5.3.2 (b)) | 14 |
| Steering headbearing has excessive free play |2.2.2| | 13 |
| Roller brake test The less effective brake control does not achieve an efficiency of 25%. |3.3.A2b| | 13 |
| Steering headbearing excessively stiff or notchy (2.2.2 (f) (i)) | 12 |
| Headlamp aim not tested (4.1.2 (b)) | 12 |
| Rear Position lamp not working (4.2.1 (a)) | 12 |
| Stop lamp not working |4.3.1 |a| |ii|| | 11 |
| Nearside Rear Direction indicator not working (4.4.1 (a) (ii)) | 11 |
| Rear reflector missing (4.8.2 (a) (ii)) | 11 |
| Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 10 |
| Stop lamp remains on when the brake is released |1.3.1e| | 10 |
| Front Stop lamp not working |4.3.1 |a| |ii|| | 10 |
| Horn not working |1.7.3a| | 10 |
| Headlamp aim not tested |4.1.2 |b|| | 10 |
| Front Position lamp not working (4.2.1 (a)) | 10 |
| Roller brake test The less effective brake control does not achieve an efficiency of 25% (1.2.2 (a) (i)) | 10 |
| Horn not working (7.7 (a)) | 10 |
| Rear Brake lever mounting insecure |3.1.2a| | 9 |
| Front Headlamp not working on main beam (4.1.1 (a) (ii)) | 9 |
| Steering headbearing has excessive wear or free play (2.2.2 (f) (i)) | 9 |
| Rear position lamp does not illuminate immediately when it is switched on |1.1.3a| | 8 |
| Rear Stop lamp not working |4.3.1 |a| |ii|| | 8 |
| Headlamp aim not tested |1.6| | 8 |
| Front Headlamp not working on dipped beam |4.1.1 |a| |ii|| | 8 |
| Riders seat insecure (6.2.5 (a) (ii)) | 8 |
| Fuel cap ineffective (6.1.3 (b) (i)) | 8 |
| Rear Brake excessively binding (1.2.1 (f)) | 8 |
| Offside Rear Direction indicators not working |1.5.1c| | 7 |
| Roller brake test The less effective brake control does not achieve an efficiency of 25% |1.2.2 |a| |i|| | 7 |
| Front Floor brake test indicates a binding brake |3.3.C2c| | 7 |
| Exhaust has a major leak of exhaust gases |6.1.2 |a|| | 7 |
| Steering headbearing excessively stiff or notchy |2.2.2 |f| |i|| | 7 |
| Rear wheel insecure |4.2.3b| | 6 |
| Front Position lamp not working |4.2.1 |a|| | 6 |
| Riders seat insecure |6.2.5 |a| |ii|| | 6 |
| Steering headbearing in such a condition that steering control is adversely affected |2.2.2 |f| |ii|| | 6 |
| Rear Roller brake test indicates brake effort rise disproportional to brake lever or pedal effort |3.3.A1c| | 6 |
| Horn not working |7.7 |a| |ii|| | 6 |
| Offside Rear Direction indicator not working |1.5.1c| | 6 |
| Nearside Front Direction indicator not working (4.4.1 (a) (ii)) | 6 |