| Most common failures | No# failures |
|---|
| Headlamp aim out of alignment | 574 |
| Headlamp at least one does not illuminate on dipped beam |1.2.2a|i|| | 362 |
| Registration plate issues | 248 |
| Rear Brake lever has inadequate reserve travel |3.1.3b| | 190 |
| Exhaust is leaking and excessively noisey |7.1.1b| | 170 |
| Headlamp not working on dipped beam (4.1.1 (a) (ii)) | 126 |
| Riders seat insecure |6.2.1a| | 116 |
| Registration plate lamp issues | 109 |
| Headlamp at least one does not illuminate on main beam |1.2.2a|ii|| | 105 |
| Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 98 |
| Fuel cap sealing washer missing |7.2.2c| | 97 |
| Front Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 95 |
| Roller brake test The less effective brake control does not achieve an efficiency of 25%. |3.3.A2b| | 88 |
| Steering movement excessively `notchy` with the wheel raised |2.2.1b| | 84 |
| Front Roller brake test indicates a binding brake |3.3.A1a| | 83 |
| Steering headbearing has excessive free play |2.2.2| | 70 |
| Steering movement excessively `notchy` with the weight on the lower bearing |2.2.1a| | 63 |
| Rear Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 62 |
| Headlamp not working on main beam (4.1.1 (a) (ii)) | 58 |
| Front Brake excessively binding (1.2.1 (f)) | 52 |
| Rear position lamp does not illuminate immediately when it is switched on |1.1.3a| | 51 |
| Front position lamp does not illuminate immediately when switched on |1.1.3a| | 50 |
| Rear Brake lever has insufficient reserve travel (1.1.2 (a)) | 44 |
| Stop lamp remains on when the brakes are released | 38 |
| Stop lamp not working (4.3.1 (a) (ii)) | 38 |
| Headlamp aim not tested |1.6| | 36 |
| Headlamp not working on dipped beam |4.1.1 |a| |ii|| | 34 |
| Rear reflector on motorcycle missing |1.4.1| | 34 |
| Roller brake test The less effective brake control does not achieve an efficiency of 25% (1.2.2 (a) (i)) | 32 |
| Front suspension has inadequate damping effect. |2.3.6c| | 31 |
| Horn control defective |1.7.2a| | 30 |
| Rear Position lamp not working (4.2.1 (a)) | 30 |
| Horn not working |1.7.3a| | 29 |
| Front Headlamp at least one does not illuminate on dipped beam |1.2.2a|i|| | 28 |
| Rear reflector missing (4.8.2 (a) (ii)) | 28 |
| Exhaust has a major leak of exhaust gases (6.1.2 (a)) | 27 |
| Headlamp aim beam image kick up to the offside |1.6| | 26 |
| Front Headlamp not working on dipped beam (4.1.1 (a) (ii)) | 25 |
| Front Stop lamp not working (4.3.1 (a) (ii)) | 24 |
| Front Floor brake test indicates a binding brake |3.3.C2c| | 23 |
| Wheel alignment incorrect which adversely affects the steering |2.5.1| | 23 |
| Exhaust excessively deteriorated |7.1.1a| | 23 |
| Rear shock absorber has inadequate damping effect. |2.4.A.3b| | 22 |
| Rear suspension bush has excessive free play |2.4.A2a|i|| | 21 |
| Front Position lamp not working (4.2.1 (a)) | 21 |
| Stop lamp remains on when the brake is released |1.3.1e| | 20 |
| Front Front position lamp does not illuminate immediately when switched on |1.1.3a| | 20 |
| Indicator tell tale not functioning |1.5.2| | 20 |
| Throttle operating incorrectly |6.2.1f| | 20 |
| Front Brake lever cannot be applied smoothly |3.1.3d| | 20 |
| Headlamp aim not tested (4.1.2 (b)) | 20 |
| Stop lamp not working |4.3.1 |a| |ii|| | 19 |
| Rear Brake lever has insufficient reserve travel |1.1.2 |a|| | 19 |
| Horn not loud enough to be heard by another road user |1.7.3a| | 19 |
| Front Headlamp not working on main beam (4.1.1 (a) (ii)) | 18 |
| Stop lamp does not illuminate by the operation of both brake controls (4.3.2 (a) (iii)) | 18 |
| Headlamp aim projected beam image obviously incorrect (4.1.2 (c)) | 18 |
| Rear wheel bearings have excessive free play |2.4.A.2c| | 17 |
| Direction indicators not working |1.5.1c| | 17 |
| Nearside Rear Direction indicator not working (4.4.1 (a) (ii)) | 17 |
| Rear Stop lamp not working (4.3.1 (a) (ii)) | 17 |
| Front Shock absorber has a serious fluid leak (5.3.2 (b)) | 17 |
| Front Valve stem seriously damaged (5.2.3 (j)) | 17 |
| Offside Rear Direction indicator not working (4.4.1 (a) (ii)) | 17 |
| Nearside Brake lever has inadequate reserve travel |3.1.3b| | 16 |
| Nearside Rear Direction indicator not working |1.5.1c| | 16 |
| Front Shock absorber has negligible damping effect (5.3.2 (b)) | 16 |
| Offside Rear Direction indicator not working |1.5.1c| | 15 |
| Steering headbearing excessively stiff or notchy (2.2.2 (f) (i)) | 15 |
| Rear Roller brake test indicates brake effort fall disproportional to brake lever or pedal effort |3.3.A1c| | 14 |
| Headlamp not working on main beam |4.1.1 |a| |ii|| | 14 |
| Nearside Rear Direction indicators not working |1.5.1c| | 14 |
| Indicator switch defective |1.5.4| | 13 |
| Offside Rear Direction indicators not working |1.5.1c| | 13 |
| Wheel alignment incorrect which adversely affects the handling |2.5.1| | 13 |
| Steering headbearing has excessive wear or free play (2.2.2 (f) (i)) | 13 |
| Rear Rear reflector missing (4.8.2 (a) (ii)) | 13 |
| Roller brake test The less effective brake control does not achieve an efficiency of 25% |1.2.2 |a| |i|| | 12 |
| Exhaust has a major leak of exhaust gases |6.1.2 |a|| | 12 |
| Rear Brake lever mounting insecure |3.1.2a| | 12 |
| Exhaust mounting does not fully support the exhaust system |7.1.1.c| | 12 |
| Headlamp insecure |1.2.3b| | 12 |
| Front Floor brake test indicates a sticking brake |3.3.C2c| | 12 |
| Front Stop lamp not working |4.3.1 |a| |ii|| | 12 |
| Front Brake lever is bent and the brake cannot be readily applied |3.1.3c| | 12 |
| Horn not working (7.7 (a) (ii)) | 12 |
| Rear Valve stem seriously damaged (5.2.3 (j)) | 12 |