| Most common failures | No# failures |
|---|
| Headlamp aim out of alignment | 125 |
| Headlamp at least one does not illuminate on dipped beam |1.2.2a|i|| | 87 |
| Front Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 84 |
| Rear Brake lever has inadequate reserve travel |3.1.3b| | 69 |
| Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 60 |
| Steering headbearing has excessive free play |2.2.2| | 50 |
| Nearside Front shock absorber seal failed and leaking oil |2.3.3| | 47 |
| Headlamp at least one does not illuminate on main beam |1.2.2a|ii|| | 41 |
| Front suspension has excessive stiffness in the suspension movement. |2.3.6b| | 39 |
| Rear reflector on motorcycle missing |1.4.1| | 38 |
| Registration plate issues | 37 |
| Exhaust is leaking and excessively noisey |7.1.1b| | 37 |
| Offside Front shock absorber seal failed and leaking oil |2.3.3| | 35 |
| Roller brake test The less effective brake control does not achieve an efficiency of 25%. |3.3.A2b| | 33 |
| Rear Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 31 |
| Horn not working |1.7.3a| | 28 |
| Front wheel bearings are excessively rough |2.3.5b| | 25 |
| Rear position lamp does not illuminate immediately when it is switched on |1.1.3a| | 22 |
| Front position lamp does not illuminate immediately when switched on |1.1.3a| | 22 |
| Rear shock absorber has inadequate damping effect. |2.4.A.3b| | 21 |
| Front shock absorber seal failed and leaking oil |2.3.3| | 20 |
| Headlamp insecure |1.2.3b| | 19 |
| Front Roller brake test indicates a binding brake |3.3.A1a| | 17 |
| Nearside Front Front shock absorber seal failed and leaking oil |2.3.3| | 17 |
| Steering movement excessively `notchy` with the wheel raised |2.2.1b| | 16 |
| Front Front shock absorber seal failed and leaking oil |2.3.3| | 16 |
| Offside Front Front shock absorber seal failed and leaking oil |2.3.3| | 16 |
| Front Brake disc|s| friction surface contaminated by oil or grease |3.2.A1k| | 14 |
| Front Headlamp at least one does not illuminate on dipped beam |1.2.2a|i|| | 14 |
| Front Steering headbearing has excessive free play |2.2.2| | 13 |
| Riders seat insecure |6.2.1a| | 12 |
| Front Front suspension has excessive stiffness in the suspension movement. |2.3.6b| | 12 |
| Roller brake test No brake control achieves an efficiency of 30%. |3.3.A2a| | 11 |
| Exhaust mounting does not fully support the exhaust system |7.1.1.c| | 10 |
| Offside Front Direction indicator not working |1.5.1c| | 10 |
| Front suspension has inadequate damping effect. |2.3.6c| | 10 |
| Exhaust noise is clearly in excess of that emitted by a similar motor bicycle fitted with a standard silencer in average condition |7.1.2| | 9 |
| Front wheel bearings have excessive free play |2.3.5b| | 9 |
| Brake lever has inadequate reserve travel |3.1.3b| | 9 |
| Nearside Brake lever has inadequate reserve travel |3.1.3b| | 9 |
| Headlamp aim not tested |1.6| | 8 |
| Front Brake lever has inadequate reserve travel |3.1.3b| | 8 |
| Floor brake test The less effective brake control does not achieve an efficiency of 25%. |3.3.C1b| | 8 |
| Stop lamp affected by the operation of another lamp |1.3.2| | 8 |
| Stop lamp remains on when the brake is released |1.3.1e| | 7 |
| Direction indicators affected by the operation of another lamp |1.5.1c| | 7 |
| Steering movement excessively `notchy` with the weight on the lower bearing |2.2.1a| | 7 |
| Front Floor brake test indicates a binding brake |3.3.C2c| | 7 |
| Front Front position lamp does not illuminate immediately when switched on |1.1.3a| | 6 |
| Steering movement excessively stiff with the weight on the lower bearing |2.2.1a| | 6 |
| Front Roller brake test indicates excessive fluctuation of brake effort |3.3.A1d| | 6 |
| Rear Roller brake test indicates a sticking brake |3.3.A1a| | 6 |
| Front position lamp insecure |1.1.1c| | 6 |
| Indicator switch defective |1.5.4| | 6 |
| Front Headlamp insecure |1.2.3b| | 6 |
| Rear Roller brake test indicates excessive fluctuation of brake effort |3.3.A1d| | 6 |
| Front Front wheel bearings have excessive free play |2.3.5b| | 6 |
| Offside Rear Direction indicator insecure |1.5.3b| | 6 |
| Front Headlamp at least one does not illuminate on main beam |1.2.2a|ii|| | 6 |
| Rear Roller brake test indicates a binding brake |3.3.A1a| | 6 |
| Headlamp aim beam image kick up to the offside |1.6| | 6 |
| Roller brake test Neither brake control achieves an efficiency of 25% |3.3.A2b| | 6 |
| Front Front suspension assembly component excessively corroded. |2.3.1| | 6 |
| Exhaust excessively deteriorated |7.1.1a| | 5 |
| Offside Front Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 5 |
| Offside Front Direction indicators not working |1.5.1c| | 5 |
| Rear Rear reflector on motorcycle missing |1.4.1| | 5 |
| Front suspension assembly component excessively corroded. |2.3.1| | 5 |
| Fuel system component leaking |7.2.1a| | 5 |
| Offside Rear Direction indicator not working |1.5.1c| | 5 |
| Rear shock absorber seal failed and leaking oil |2.4.A.1c| | 5 |
| Offside Handlebar handgrip not secure to handlebars. |2.1.1c| | 5 |
| Front suspension assembly excessive wear or free play in a front suspension component |2.3.4| | 5 |
| Horn not loud enough to be heard by another road user |1.7.3a| | 5 |
| Front Brake lever is so short and the brake cannot be readily applied |3.1.3c| | 5 |
| Headlamp dipped beam affected by the operation of another lamp |1.2.2c| | 4 |
| Headlamp switch insecure |1.2.4| | 4 |
| Rear reflector on motorcycle obscured |1.4.1| | 4 |
| Nearside Rear Direction indicator damaged and function impaired |1.5.3a| | 4 |
| Rear wheel rotation likely to be impeded |6.2.1b| | 4 |
| Offside Front Direction indicator insecure |1.5.3b| | 4 |
| Rear wheel has a loose wheel nut|s| |4.2.3a| | 4 |
| Wheel alignment incorrect which adversely affects the steering |2.5.1| | 4 |
| Nearside Rear Direction indicators not working |1.5.1c| | 4 |
| Front Brake lever cannot be applied smoothly |3.1.3d| | 4 |
| Throttle operating incorrectly |6.2.1f| | 4 |
| Horn is not a constant note |1.7.3c| | 4 |
| Fairings insecure and likely to impede the steering |2.1.2e| | 4 |
| Front Brake lever is bent and the brake cannot be readily applied |3.1.3c| | 4 |
| Front Brake disc|s| excessively scored |3.2.A1l| | 4 |
| Front Front suspension has inadequate damping effect. |2.3.6c| | 4 |
| Rear Brake lever cannot be released smoothly |3.1.3d| | 4 |
| Front Direction indicators not working |1.5.1c| | 3 |
| Steering movement excessively stiff with the wheel raised |2.2.1b| | 3 |
| Indicator switch insecure |1.5.4| | 3 |
| Front Brake disc|s| is excessively distorted |3.2.A1m| | 3 |
| Rear Brake lever mounting insecure |3.1.2a| | 3 |
| Offside Direction indicator not working |1.5.1c| | 3 |
| Front suspension assembly component excessively bent |2.3.1| | 3 |
| Rear Brake lever attachment screws loose |3.1.2b| | 3 |
| Front Brake fluid reservoir fluid level dangerously low |3.2.B1d| | 3 |
| Centre Front Front position lamp does not illuminate immediately when switched on |1.1.3a| | 3 |
| Wheel alignment incorrect which adversely affects the handling |2.5.1| | 3 |
| All position lamps do not illuminate immediately when switched on |1.1.3a| | 3 |
| Rear Roller brake test indicates brake effort fall disproportional to brake lever or pedal effort |3.3.A1c| | 3 |
| Front Front wheel bearings are excessively rough |2.3.5b| | 3 |
| Rear wheel bearings have excessive free play |2.4.A.2c| | 3 |
| Rear Rear shock absorber has inadequate damping effect. |2.4.A.3b| | 3 |
| Nearside Front Brake lever has inadequate reserve travel |3.1.3b| | 3 |
| Nearside Direction indicator not working |1.5.1c| | 3 |
| Brake performance not tested |3.3| | 3 |
| Front Stop lamp remains on when the brake is released |1.3.1e| | 3 |
| Nearside Rear Direction indicator not working |1.5.1c| | 3 |
| Headlamp switch faulty |1.2.4| | 3 |
| Nearside Front Brake lever insecure |3.1.2a| | 3 |
| Front Horn not working |1.7.3a| | 3 |
| Front Brake hose is likely to be fouled or trapped by moving parts |3.2.B2c| | 3 |
| Direction indicators not working |1.5.1c| | 3 |
| Rear Rear shock absorber seal failed and leaking oil |2.4.A.1c| | 3 |
| Front Front suspension assembly excessive wear or free play in a front suspension component |2.3.4| | 3 |
| Position lamp switch insecure |1.1.4b| | 3 |
| Nearside Rear Direction indicator insecure |1.5.3b| | 3 |
| Registration plate lamp issues | 3 |
| Headlamp not working on main beam (4.1.1 (a) (ii)) | 3 |
| Front Stop lamp not working (4.3.1 (a) (ii)) | 3 |
| Horn not working (7.7 (a) (ii)) | 3 |
| Rear Stop lamp not working (4.3.1 (a) (ii)) | 3 |
| Rear reflector missing (4.8.2 (a) (ii)) | 3 |