| Most common failures | No# failures |
|---|
| Headlamp aim out of alignment | 93 |
| Rear shock absorber has inadequate damping effect. |2.4.A.3b| | 76 |
| Front suspension has excessive stiffness in the suspension movement. |2.3.6b| | 67 |
| Rear Brake lever has inadequate reserve travel |3.1.3b| | 66 |
| Headlamp at least one does not illuminate on dipped beam |1.2.2a|i|| | 63 |
| Steering headbearing has excessive free play |2.2.2| | 54 |
| Rear reflector on motorcycle missing |1.4.1| | 40 |
| Exhaust is leaking and excessively noisey |7.1.1b| | 38 |
| Front Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 35 |
| Front wheel bearings are excessively rough |2.3.5b| | 34 |
| Registration plate issues | 30 |
| Front position lamp does not illuminate immediately when switched on |1.1.3a| | 25 |
| Horn not working |1.7.3a| | 25 |
| Rear Roller brake test indicates excessive fluctuation of brake effort |3.3.A1d| | 25 |
| Headlamp insecure |1.2.3b| | 25 |
| Rear Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 25 |
| Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 22 |
| Front Roller brake test indicates a binding brake |3.3.A1a| | 21 |
| Headlamp at least one does not illuminate on main beam |1.2.2a|ii|| | 19 |
| Roller brake test The less effective brake control does not achieve an efficiency of 25%. |3.3.A2b| | 19 |
| Rear Rear shock absorber has inadequate damping effect. |2.4.A.3b| | 18 |
| Rear position lamp does not illuminate immediately when it is switched on |1.1.3a| | 17 |
| Front Headlamp at least one does not illuminate on dipped beam |1.2.2a|i|| | 17 |
| Front Front suspension has excessive stiffness in the suspension movement. |2.3.6b| | 16 |
| Rear shock absorber seal failed and leaking oil |2.4.A.1c| | 15 |
| Offside Steering lock stop ineffective |2.1.3| | 15 |
| Headlamp aim not tested |1.6| | 15 |
| Nearside Front Direction indicator not working |1.5.1c| | 14 |
| Front wheel bearings have excessive free play |2.3.5b| | 13 |
| Rear Rear reflector on motorcycle missing |1.4.1| | 12 |
| Front Front wheel bearings are excessively rough |2.3.5b| | 11 |
| Front Front position lamp does not illuminate immediately when switched on |1.1.3a| | 11 |
| Riders seat insecure |6.2.1a| | 10 |
| Exhaust excessively deteriorated |7.1.1a| | 10 |
| Front Steering headbearing has excessive free play |2.2.2| | 10 |
| Front Fairings insecure and likely to impede the steering |2.1.2e| | 9 |
| Headlamp aim beam image kick up to the offside |1.6| | 8 |
| Brake lever has inadequate reserve travel |3.1.3b| | 8 |
| Front suspension has inadequate damping effect. |2.3.6c| | 8 |
| 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| | 8 |
| Fairings insecure and likely to impede the steering |2.1.2e| | 7 |
| Front Floor brake test indicates a binding brake |3.3.C2c| | 7 |
| Nearside Front Direction indicators not working |1.5.1c| | 7 |
| Front Brake lever has inadequate reserve travel |3.1.3b| | 7 |
| Throttle operating incorrectly |6.2.1f| | 7 |
| Rear Roller brake test indicates a binding brake |3.3.A1a| | 7 |
| Front position lamp insecure |1.1.1c| | 6 |
| Nearside Brake lever has inadequate reserve travel |3.1.3b| | 6 |
| Front Horn not working |1.7.3a| | 6 |
| Rear Brake lever insecure |3.1.2a| | 6 |
| Direction indicators flashing more than 120 times per minute |1.5.1c| | 6 |
| Rear reflector on motorcycle obscured |1.4.1| | 6 |
| Rear Roller brake test indicates a severely juddering brake |3.3.A1b| | 6 |
| Offside Front Direction indicator not working |1.5.1c| | 6 |
| Direction indicators not working |1.5.1c| | 5 |
| Steering control fouling between components which interferes with the free movement of the steering |2.1.2a| | 5 |
| Horn not loud enough to be heard by another road user |1.7.3a| | 5 |
| Floor brake test The less effective brake control does not achieve an efficiency of 25%. |3.3.C1b| | 5 |
| Exhaust mounting does not fully support the exhaust system |7.1.1.c| | 5 |
| Direction indicators affected by the operation of another lamp |1.5.1c| | 5 |
| Front Direction indicators not working |1.5.1c| | 5 |
| Front Front wheel bearings have excessive free play |2.3.5b| | 5 |
| Offside Front Direction indicators not working |1.5.1c| | 5 |
| Rear Rear shock absorber seal failed and leaking oil |2.4.A.1c| | 5 |
| Indicator tell tale not functioning |1.5.2| | 5 |
| Steering movement excessively `notchy` with the wheel raised |2.2.1b| | 5 |
| Front Headlamp insecure |1.2.3b| | 4 |
| Rear Brake lever mounting insecure |3.1.2a| | 4 |
| Headlamp damaged and function impaired |1.2.3a| | 4 |
| Front Headlamp at least one does not illuminate on main beam |1.2.2a|ii|| | 4 |
| Front Brake lever cannot be applied smoothly |3.1.3d| | 4 |
| Front Roller brake test indicates excessive fluctuation of brake effort |3.3.A1d| | 4 |
| Front Brake disc|s| excessively scored |3.2.A1l| | 4 |
| Front Front position lamp insecure |1.1.1c| | 4 |
| Horn sounds harsh or grating |1.7.3c| | 4 |
| Rear Front mudguard insecure |2.3.7| | 4 |
| Fairing insecure and likely to impede the steering |2.1.2e| | 4 |
| Front Steering lock stop ineffective |2.1.3| | 4 |
| Headlamp aim headlamp deteriorated and function impaired |1.2.3a| | 4 |
| Headlamp switch faulty |1.2.4| | 4 |
| Front Front suspension has inadequate damping effect. |2.3.6c| | 4 |
| Rear Rear position lamp does not illuminate immediately when it is switched on |1.1.3a| | 4 |
| Nearside Steering lock stop ineffective |2.1.3| | 4 |
| Offside Front Front position lamp does not illuminate immediately when switched on |1.1.3a| | 4 |
| Headlamp dipped beam affected by the operation of another lamp |1.2.2c| | 4 |
| Roller brake test No brake control achieves an efficiency of 30%. |3.3.A2a| | 4 |
| Rear Roller brake test indicates a sticking brake |3.3.A1a| | 4 |
| Nearside Rear Rear shock absorber has inadequate damping effect. |2.4.A.3b| | 4 |
| Registration plate lamp issues | 4 |
| Rear Stop lamp remains on when the brake is released |1.3.1e| | 3 |
| Offside Front Handlebar handgrip not secure to handlebars. |2.1.1c| | 3 |
| Centre Front Headlamp at least one does not illuminate on dipped beam |1.2.2a|i|| | 3 |
| Front suspension assembly excessive wear or free play in a front suspension component |2.3.4| | 3 |
| Motorcycle structure insecure and likely to affect the correct functioning of the steering or braking |6.1.1c| | 3 |
| Rear wheel insecure |4.2.3b| | 3 |
| Front Brake disc|s| is excessively distorted |3.2.A1m| | 3 |
| Horn is not continous or uniform |1.7.3c| | 3 |
| Rear Direction indicators not working |1.5.1c| | 3 |
| Rear Roller brake test indicates a severely grabbing brake |3.3.A1b| | 3 |
| Front Fairing insecure and likely to impede the steering |2.1.2e| | 3 |
| Front Roller brake test indicates a severely juddering brake |3.3.A1b| | 3 |
| Rear Rear reflector on motorcycle obscured |1.4.1| | 3 |
| Rear position lamp adversely affected by the operation of another lamp |1.1.3b| | 3 |
| Offside Rear Exhaust is leaking and excessively noisey |7.1.1b| | 3 |
| Centre Front Headlamp insecure |1.2.3b| | 3 |
| Headlamp aim headlamp damaged and function impaired |1.2.3a| | 3 |
| Front Exhaust is leaking and excessively noisey |7.1.1b| | 3 |
| Offside Steering lock stop missing |2.1.3| | 3 |
| Steering movement excessively stiff with the weight on the lower bearing |2.2.1a| | 3 |
| Front Front suspension assembly excessive wear or free play in a front suspension component |2.3.4| | 3 |
| Rear Roller brake test indicates brake effort rise disproportional to brake lever or pedal effort |3.3.A1c| | 3 |
| Centre Front Steering headbearing has excessive free play |2.2.2| | 3 |
| Rear reflector on motorcycle obscured |1.4.2b| | 3 |
| Roller brake test Neither brake control achieves an efficiency of 25% |3.3.A2b| | 3 |
| Offside Front position lamp does not illuminate immediately when switched on |1.1.3a| | 3 |
| Headlamp insecure (4.1.1 (c)) | 3 |
| Rear Shock absorber has negligible damping effect (5.3.2 (b)) | 3 |