| Most common failures | No# failures |
|---|
| Headlamp aim out of alignment | 776 |
| Headlamp at least one does not illuminate on dipped beam |1.2.2a|i|| | 605 |
| Riders seat insecure |6.2.1a| | 341 |
| Exhaust is leaking and excessively noisey |7.1.1b| | 303 |
| Headlamp at least one does not illuminate on main beam |1.2.2a|ii|| | 302 |
| Rear Brake lever has inadequate reserve travel |3.1.3b| | 282 |
| Registration plate issues | 190 |
| Steering movement excessively `notchy` with the wheel raised |2.2.1b| | 161 |
| Horn not working |1.7.3a| | 160 |
| Roller brake test The less effective brake control does not achieve an efficiency of 25%. |3.3.A2b| | 153 |
| Steering headbearing has excessive free play |2.2.2| | 144 |
| Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 140 |
| Fuel cap sealing washer missing |7.2.2c| | 138 |
| Front Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 135 |
| Steering movement excessively `notchy` with the weight on the lower bearing |2.2.1a| | 117 |
| Exhaust excessively deteriorated |7.1.1a| | 108 |
| Front position lamp does not illuminate immediately when switched on |1.1.3a| | 108 |
| Front Headlamp at least one does not illuminate on dipped beam |1.2.2a|i|| | 98 |
| Rear shock absorber has inadequate damping effect. |2.4.A.3b| | 98 |
| Headlamp aim not tested |1.6| | 88 |
| Rear position lamp does not illuminate immediately when it is switched on |1.1.3a| | 84 |
| Rear Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 80 |
| Front suspension has inadequate damping effect. |2.3.6c| | 74 |
| Horn not loud enough to be heard by another road user |1.7.3a| | 59 |
| Throttle operating incorrectly |6.2.1f| | 58 |
| Direction indicators not working |1.5.1c| | 56 |
| Front Roller brake test indicates a binding brake |3.3.A1a| | 55 |
| Offside Rear Direction indicator not working |1.5.1c| | 52 |
| Nearside Rear Direction indicator not working |1.5.1c| | 52 |
| Nearside Indicator tell tale not functioning |1.5.2| | 46 |
| Nearside Front Direction indicator not working |1.5.1c| | 45 |
| Headlamp switch faulty |1.2.4| | 44 |
| Front Front position lamp does not illuminate immediately when switched on |1.1.3a| | 43 |
| Front suspension has excessive stiffness in the suspension movement. |2.3.6b| | 41 |
| Stop lamp remains on when the brake is released |1.3.1e| | 40 |
| Wheel alignment incorrect which adversely affects the steering |2.5.1| | 39 |
| Headlamp not working on dipped beam (4.1.1 (a) (ii)) | 38 |
| Rear Stop lamp remains on when the brake is released |1.3.1e| | 37 |
| Registration plate lamp issues | 37 |
| Front wheel bearings have excessive free play |2.3.5b| | 36 |
| Front Headlamp at least one does not illuminate on main beam |1.2.2a|ii|| | 36 |
| Exhaust mounting does not fully support the exhaust system |7.1.1.c| | 32 |
| Horn control defective |1.7.2a| | 32 |
| Headlamp aim beam image kick up to the offside |1.6| | 32 |
| Rear shock absorber seal failed and leaking oil |2.4.A.1c| | 32 |
| Headlamp insecure |1.2.3b| | 31 |
| Brake lever has inadequate reserve travel |3.1.3b| | 30 |
| Headlamp not working on main beam (4.1.1 (a) (ii)) | 30 |
| Steering movement excessively stiff with the weight on the lower bearing |2.2.1a| | 29 |
| Front Steering movement excessively `notchy` with the wheel raised |2.2.1b| | 29 |
| Offside Indicator tell tale not functioning |1.5.2| | 29 |
| Nearside Rear Direction indicators not working |1.5.1c| | 28 |
| Steering movement excessively stiff with the wheel raised |2.2.1b| | 28 |
| Offside Front Direction indicators not working |1.5.1c| | 27 |
| Front Stop lamp remains on when the brake is released |1.3.1e| | 26 |
| Offside Front Direction indicator not working |1.5.1c| | 26 |
| Wheel alignment incorrect which adversely affects the handling |2.5.1| | 25 |
| Offside Rear Direction indicators not working |1.5.1c| | 25 |
| Front shock absorber seal failed and leaking oil |2.3.3| | 25 |
| Indicator switch defective |1.5.4| | 25 |
| Rear Rear shock absorber has inadequate damping effect. |2.4.A.3b| | 23 |
| Rear Exhaust is leaking and excessively noisey |7.1.1b| | 23 |
| Rear wheel bearings have excessive free play |2.4.A.2c| | 23 |
| Nearside Steering lock stop ineffective |2.1.3| | 23 |
| Nearside Front Direction indicators not working |1.5.1c| | 22 |
| Offside Steering lock stop ineffective |2.1.3| | 22 |
| Roller brake test No brake control achieves an efficiency of 30%. |3.3.A2a| | 22 |
| Headlamp aim headlamp deteriorated and function impaired |1.2.3a| | 22 |
| Rear Roller brake test indicates excessive fluctuation of brake effort |3.3.A1d| | 22 |
| Nearside Rear Direction indicator damaged and function impaired |1.5.3a| | 22 |
| Stop lamp remains on when the brakes are released | 21 |
| Headlamp not working on dipped beam |4.1.1 |a| |ii|| | 21 |
| Motorcycle structure excessively corroded |6.1.1a| | 20 |
| Front Brake lever cannot be applied smoothly |3.1.3d| | 20 |
| Front Steering headbearing has excessive free play |2.2.2| | 19 |
| Rear Brake lever mounting insecure |3.1.2a| | 19 |
| Rear Roller brake test indicates brake effort rise disproportional to brake lever or pedal effort |3.3.A1c| | 19 |
| Front Brake disc|s| excessively worn |3.2.A1l| | 18 |
| Direction indicators flashing more than 120 times per minute |1.5.1c| | 18 |
| Rear Riders seat insecure |6.2.1a| | 17 |
| Rear Brake lining|s| less than 1.5 mm thick |3.2.A1f|i|| | 17 |
| Headlamp not working on main beam |4.1.1 |a| |ii|| | 16 |
| Offside Front Direction indicator damaged and function impaired |1.5.3a| | 16 |
| Front Steering movement excessively `notchy` with the weight on the lower bearing |2.2.1a| | 16 |
| Front Riders seat insecure |6.2.1a| | 16 |
| Rear reflector on motorcycle missing |1.4.1| | 15 |
| Rear Rear position lamp does not illuminate immediately when it is switched on |1.1.3a| | 15 |
| Front Front wheel bearings have excessive free play |2.3.5b| | 15 |
| Front Horn not working |1.7.3a| | 15 |