| Most common failures | No# failures |
|---|
| Headlamp aim out of alignment | 79 |
| Steering headbearing has excessive free play |2.2.2| | 52 |
| Headlamp at least one does not illuminate on dipped beam |1.2.2a|i|| | 46 |
| Rear Brake lever has inadequate reserve travel |3.1.3b| | 41 |
| Front Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 34 |
| Front suspension has excessive stiffness in the suspension movement. |2.3.6b| | 27 |
| Registration plate issues | 24 |
| Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 19 |
| Front position lamp does not illuminate immediately when switched on |1.1.3a| | 18 |
| Rear reflector on motorcycle missing |1.4.1| | 18 |
| Front Roller brake test indicates a binding brake |3.3.A1a| | 17 |
| Rear Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 17 |
| Headlamp at least one does not illuminate on main beam |1.2.2a|ii|| | 17 |
| Nearside Front shock absorber seal failed and leaking oil |2.3.3| | 17 |
| Roller brake test The less effective brake control does not achieve an efficiency of 25%. |3.3.A2b| | 15 |
| Horn not working |1.7.3a| | 15 |
| Headlamp insecure |1.2.3b| | 15 |
| Front Headlamp at least one does not illuminate on dipped beam |1.2.2a|i|| | 14 |
| Exhaust is leaking and excessively noisey |7.1.1b| | 14 |
| Rear shock absorber has inadequate damping effect. |2.4.A.3b| | 13 |
| Rear Roller brake test indicates excessive fluctuation of brake effort |3.3.A1d| | 13 |
| Offside Front shock absorber seal failed and leaking oil |2.3.3| | 13 |
| Riders seat insecure |6.2.1a| | 11 |
| Front Front shock absorber seal failed and leaking oil |2.3.3| | 11 |
| Front shock absorber seal failed and leaking oil |2.3.3| | 10 |
| Front Steering headbearing has excessive free play |2.2.2| | 10 |
| Front Front suspension has excessive stiffness in the suspension movement. |2.3.6b| | 10 |
| Offside Front Direction indicator not working |1.5.1c| | 9 |
| Rear Brake lining|s| less than 1.5 mm thick |3.2.A1f|i|| | 7 |
| Front wheel bearings have excessive free play |2.3.5b| | 7 |
| Rear Roller brake test indicates a severely grabbing brake |3.3.A1b| | 7 |
| Rear Roller brake test indicates brake effort fall disproportional to brake lever or pedal effort |3.3.A1c| | 7 |
| Nearside Rear Direction indicator not working |1.5.1c| | 7 |
| Front Brake disc|s| friction surface contaminated by oil or grease |3.2.A1k| | 6 |
| Roller brake test Neither brake control achieves an efficiency of 25% |3.3.A2b| | 6 |
| Exhaust mounting does not fully support the exhaust system |7.1.1.c| | 6 |
| Steering movement excessively `notchy` with the wheel raised |2.2.1b| | 6 |
| Rear position lamp does not illuminate immediately when it is switched on |1.1.3a| | 6 |
| Rear Rear position lamp does not illuminate immediately when it is switched on |1.1.3a| | 6 |
| Stop lamp affected by the operation of another lamp |1.3.2| | 6 |
| Headlamp aim not tested |1.6| | 5 |
| Front wheel bearings are excessively rough |2.3.5b| | 5 |
| Roller brake test No brake control achieves an efficiency of 30%. |3.3.A2a| | 5 |
| Front Front position lamp does not illuminate immediately when switched on |1.1.3a| | 5 |
| Nearside Rear Direction indicator insecure |1.5.3b| | 5 |
| Front Brake lever is bent and the brake cannot be readily applied |3.1.3c| | 5 |
| Front Stop lamp remains on when the brake is released |1.3.1e| | 5 |
| Front suspension has inadequate damping effect. |2.3.6c| | 5 |
| Rear shock absorber seal failed and leaking oil |2.4.A.1c| | 5 |
| Rear Roller brake test indicates a binding brake |3.3.A1a| | 5 |
| Front Brake lever has inadequate reserve travel |3.1.3b| | 4 |
| Offside Front Direction indicator insecure |1.5.3b| | 4 |
| Front position lamp insecure |1.1.1c| | 4 |
| Throttle operating incorrectly |6.2.1f| | 4 |
| Rear Brake lever is so short and the brake cannot be readily applied |3.1.3c| | 4 |
| Headlamp aim headlamp deteriorated and function impaired |1.2.3a| | 4 |
| Front Brake disc|s| is excessively distorted |3.2.A1m| | 4 |
| Direction indicators not working |1.5.1c| | 4 |
| Front Horn not working |1.7.3a| | 4 |
| Nearside Brake lever has inadequate reserve travel |3.1.3b| | 4 |
| Brake lever has inadequate reserve travel |3.1.3b| | 4 |
| Nearside Front Front shock absorber seal failed and leaking oil |2.3.3| | 4 |
| Offside Front Front shock absorber seal failed and leaking oil |2.3.3| | 4 |
| Headlamp main beam affected by the operation of another lamp |1.2.2c| | 4 |
| Rear Brake lever insecure |3.1.2a| | 3 |
| Offside Front Direction indicators not working |1.5.1c| | 3 |
| Rear Roller brake test indicates a severely juddering brake |3.3.A1b| | 3 |
| Direction indicator affected by the operation of another lamp |1.5.1c| | 3 |
| Steering movement excessively stiff with the wheel raised |2.2.1b| | 3 |
| Rear Roller brake test indicates a sticking brake |3.3.A1a| | 3 |
| Offside Rear Direction indicator not working |1.5.1c| | 3 |
| Front Front suspension has inadequate damping effect. |2.3.6c| | 3 |
| Front Roller brake test indicates excessive fluctuation of brake effort |3.3.A1d| | 3 |
| Rear Rear shock absorber seal failed and leaking oil |2.4.A.1c| | 3 |
| Rear wheel has a loose wheel nut|s| |4.2.3a| | 3 |
| Front Headlamp at least one does not illuminate on main beam |1.2.2a|ii|| | 3 |
| Direction indicators affected by the operation of another lamp |1.5.1c| | 3 |
| Front Brake disc|s| has excessive run out |3.2.A1m| | 3 |
| Rear Rear reflector on motorcycle missing |1.4.1| | 3 |
| Lower Steering headbearing has excessive free play |2.2.2| | 3 |
| Front Exhaust is leaking and excessively noisey |7.1.1b| | 3 |
| Front Roller brake test indicates a sticking brake |3.3.A1a| | 3 |
| Registration plate lamp issues | 3 |
| Rear Brake lever mounting insecure |3.1.2a| | 3 |
| Headlamp switch faulty |1.2.4| | 3 |
| Front Floor brake test indicates a sticking brake |3.3.C2c| | 3 |
| Headlamp not working on dipped beam (4.1.1 (a) (ii)) | 3 |
| Front Brake lever is damaged and the brake cannot be readily applied |3.1.3c| | 2 |
| Fairings insecure and likely to impede the steering |2.1.2e| | 2 |
| Offside Rear Direction indicators not working |1.5.1c| | 2 |
| Dipswitch does not deflect the main beam/s, making them into dipped beam/s |1.2.2b|ii|| | 2 |
| Headlamp aim headlamp damaged and function impaired |1.2.3a| | 2 |
| Rear Brake lever cannot be applied smoothly |3.1.3d| | 2 |
| Front Headlamp insecure |1.2.3b| | 2 |
| Front Front wheel bearings have excessive free play |2.3.5b| | 2 |
| Centre Front Steering headbearing has excessive free play |2.2.2| | 2 |
| Front suspension assembly component excessively corroded. |2.3.1| | 2 |
| Motorcycle structure excessively damaged |6.1.1a| | 2 |
| Rear Brake lever cannot be released smoothly |3.1.3d| | 2 |
| Nearside Front Direction indicator insecure |1.5.3b| | 2 |
| Indicator switch defective |1.5.4| | 2 |
| Rear Rear shock absorber has inadequate damping effect. |2.4.A.3b| | 2 |
| 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| | 2 |
| Horn not loud enough to be heard by another road user |1.7.3a| | 2 |
| Front Direction indicator affected by the operation of another lamp |1.5.1c| | 2 |
| Rear Direction indicator affected by the operation of another lamp |1.5.1c| | 2 |
| Throttle has a significant change in engine speed whilst moving the steering from lock to lock |2.1.4| | 2 |
| Upper Steering headbearing has excessive free play |2.2.2| | 2 |
| Front Direction indicators not working |1.5.1c| | 2 |
| Stop lamp remains on when the brake is released |1.3.1e| | 2 |
| Nearside Handlebar handgrip not secure to handlebars. |2.1.1c| | 2 |
| Steering movement excessively `notchy` with the weight on the lower bearing |2.2.1a| | 2 |
| Front Dipswitch does not deflect the main beam/s, making them into dipped beam/s |1.2.2b|ii|| | 2 |
| Nearside Rear Direction indicators not working |1.5.1c| | 2 |
| Headlamp damaged and function impaired |1.2.3a| | 2 |
| Horn sounds harsh or grating |1.7.3c| | 2 |
| Horn is not a constant note |1.7.3c| | 2 |
| Front Horn not loud enough to be heard by another road user |1.7.3a| | 2 |
| Front Fairings insecure and likely to impede the steering |2.1.2e| | 2 |
| Horn is not continous or uniform |1.7.3c| | 2 |
| Front Steering movement excessively `notchy` with the wheel raised |2.2.1b| | 2 |
| All position lamps do not illuminate immediately when switched on |1.1.3a| | 2 |
| Front Hydraulic brake control feels spongy |3.1.4a| | 2 |
| Steering movement excessively rough with the wheel raised |2.2.1b| | 2 |
| Offside Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 2 |
| Rear wheel bearings have excessive free play |2.4.A.2c| | 2 |
| Horn control defective |1.7.2a| | 2 |
| Nearside Front suspension assembly component excessively corroded. |2.3.1| | 2 |
| Offside Front suspension assembly component excessively corroded. |2.3.1| | 2 |
| Rear position lamp adversely affected by the operation of another lamp |1.1.3b| | 2 |
| Front Front wheel bearings are excessively rough |2.3.5b| | 2 |
| Front Roller brake test indicates a severely juddering brake |3.3.A1b| | 2 |
| Rear All position lamps do not illuminate immediately when switched on |1.1.3a| | 2 |
| Rear Stop lamp damaged and function impaired |1.3.3a| | 2 |
| Rear Stop lamp affected by the operation of another lamp |1.3.2| | 2 |
| Headlamp dipped beam affected by the operation of another lamp |1.2.2c| | 2 |
| Offside Rear Direction indicator insecure |1.5.3b| | 2 |
| Front Headlamp not working on dipped beam (4.1.1 (a) (ii)) | 2 |
| Rear Brake lever has insufficient reserve travel (1.1.2 (a)) | 2 |
| Offside Front Shock absorber has a serious fluid leak (5.3.2 (b)) | 2 |