| Most common failures | No# failures |
|---|
| Headlamp at least one does not illuminate on dipped beam |1.2.2a|i|| | 291 |
| Headlamp aim out of alignment | 222 |
| Rear Brake lever has inadequate reserve travel |3.1.3b| | 184 |
| Front suspension has excessive stiffness in the suspension movement. |2.3.6b| | 164 |
| Front wheel bearings have excessive free play |2.3.5b| | 96 |
| Headlamp at least one does not illuminate on main beam |1.2.2a|ii|| | 80 |
| Front Brake lever has inadequate reserve travel |3.1.3b| | 76 |
| Front position lamp does not illuminate immediately when switched on |1.1.3a| | 67 |
| Front wheel bearings are excessively rough |2.3.5b| | 66 |
| Steering headbearing has excessive free play |2.2.2| | 48 |
| Horn not working |1.7.3a| | 48 |
| Registration plate issues | 44 |
| Front Headlamp at least one does not illuminate on dipped beam |1.2.2a|i|| | 43 |
| Front Front suspension has excessive stiffness in the suspension movement. |2.3.6b| | 40 |
| Roller brake test The less effective brake control does not achieve an efficiency of 25%. |3.3.A2b| | 37 |
| Headlamp insecure |1.2.3b| | 32 |
| Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 30 |
| Front Front wheel bearings have excessive free play |2.3.5b| | 29 |
| Rear Brake lever insecure |3.1.2a| | 26 |
| Headlamp aim not tested |1.6| | 24 |
| Nearside Handlebar handgrip not secure to handlebars. |2.1.1c| | 23 |
| Front Roller brake test indicates a binding brake |3.3.A1a| | 23 |
| Front Front wheel bearings are excessively rough |2.3.5b| | 22 |
| Rear suspension bush has excessive free play |2.4.A2a|i|| | 20 |
| Brake lever has inadequate reserve travel |3.1.3b| | 19 |
| Front suspension has inadequate damping effect. |2.3.6c| | 19 |
| Front Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 19 |
| Rear suspension bush excessively deteriorated |2.4.A2a|i|| | 19 |
| Nearside Brake lever has inadequate reserve travel |3.1.3b| | 17 |
| Rear Stop lamp remains on when the brake is released |1.3.1e| | 15 |
| Wheel alignment incorrect which adversely affects the handling |2.5.1| | 15 |
| Headlamp not working on dipped beam (4.1.1 (a) (ii)) | 15 |
| Stop lamp remains on when the brake is released |1.3.1e| | 15 |
| Headlamp not working on dipped beam |4.1.1 |a| |ii|| | 14 |
| Rear Roller brake test indicates a binding brake |3.3.A1a| | 13 |
| Rear Brake lever mounting insecure |3.1.2a| | 13 |
| Riders seat insecure |6.2.1a| | 12 |
| Wheel alignment incorrect which adversely affects the steering |2.5.1| | 12 |
| Exhaust is leaking and excessively noisey |7.1.1b| | 12 |
| Direction indicators affected by the operation of another lamp |1.5.1c| | 12 |
| Front Front suspension has inadequate damping effect. |2.3.6c| | 12 |
| Rear shock absorber has inadequate damping effect. |2.4.A.3b| | 12 |
| Rear position lamp adversely affected by the operation of another lamp |1.1.3b| | 11 |
| Steering movement excessively `notchy` with the wheel raised |2.2.1b| | 11 |
| Rear position lamp does not illuminate immediately when it is switched on |1.1.3a| | 11 |
| Offside Brake lever has inadequate reserve travel |3.1.3b| | 11 |
| Front Front position lamp does not illuminate immediately when switched on |1.1.3a| | 10 |
| Rear Brake lever has insufficient reserve travel (1.1.2 (a)) | 9 |
| Roller brake test No brake control achieves an efficiency of 30%. |3.3.A2a| | 9 |
| Front suspension assembly component excessively bent |2.3.1| | 9 |
| Headlamp dipped beam affected by the operation of another lamp |1.2.2c| | 9 |
| Stop lamp remains on when the brakes are released | 9 |
| Rear Roller brake test indicates brake effort fall disproportional to brake lever or pedal effort |3.3.A1c| | 9 |
| Front Wheel bearing rough when rotated (5.1.3 (b) (i)) | 8 |
| Front position lamp insecure |1.1.1c| | 8 |
| Front Steering headbearing has excessive free play |2.2.2| | 8 |
| Horn not loud enough to be heard by another road user |1.7.3a| | 8 |
| Rear Roller brake test indicates excessive fluctuation of brake effort |3.3.A1d| | 8 |
| Front Floor brake test indicates a sticking brake |3.3.C2c| | 8 |
| Nearside Front Direction indicator not working |1.5.1c| | 8 |
| Front Roller brake test indicates a sticking brake |3.3.A1a| | 8 |
| Rear Roller brake test indicates a sticking brake |3.3.A1a| | 8 |
| Headlamp main beam affected by the operation of another lamp |1.2.2c| | 7 |
| Stop lamp affected by the operation of the horn |1.3.2| | 7 |
| Front Valve stem seriously damaged (5.2.3 (j)) | 7 |
| Nearside Rear Brake lever has inadequate reserve travel |3.1.3b| | 7 |
| Exhaust mounting does not fully support the exhaust system |7.1.1.c| | 7 |
| Rear wheel spindle securing nut locking device missing |2.4.A.2b| | 7 |
| Offside Front Brake lever has inadequate reserve travel |3.1.3b| | 7 |
| Nearside Front Brake lever has inadequate reserve travel |3.1.3b| | 7 |
| Headlamp switch faulty |1.2.4| | 7 |
| Horn control defective |1.7.2a| | 7 |
| Roller brake test Neither brake control achieves an efficiency of 25% |3.3.A2b| | 6 |
| Stop lamp affected by the operation of another lamp |1.3.2| | 6 |
| Centre Front Headlamp at least one does not illuminate on dipped beam |1.2.2a|i|| | 6 |
| Handlebar deformed |2.1.1b| | 6 |
| Rear Valve stem seriously damaged (5.2.3 (j)) | 6 |
| Rear Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 6 |
| Throttle operating incorrectly |6.2.1f| | 6 |
| Nearside Direction indicator not working |1.5.1c| | 6 |
| Steering movement excessively `notchy` with the weight on the lower bearing |2.2.1a| | 6 |
| Front Brake lever insecure |3.1.2a| | 6 |
| Front Headlamp at least one does not illuminate on main beam |1.2.2a|ii|| | 6 |
| Rear Brake lining|s| less than 1.5 mm thick |3.2.A1f|i|| | 6 |