| Most common failures | No# failures |
|---|
| Front Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 17 |
| Headlamp aim out of alignment | 15 |
| Rear Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 9 |
| Exhaust is leaking and excessively noisey |7.1.1b| | 9 |
| Rear Brake lever has inadequate reserve travel |3.1.3b| | 7 |
| Wheel alignment incorrect which adversely affects the handling |2.5.1| | 5 |
| Headlamp at least one does not illuminate on dipped beam |1.2.2a|i|| | 5 |
| Registration plate issues | 5 |
| Steering headbearing has excessive free play |2.2.2| | 5 |
| Riders seat insecure |6.2.1a| | 4 |
| Rear reflector on motorcycle missing |1.4.1| | 4 |
| Rear reflector on motorcycle obscured |1.4.1| | 4 |
| Front suspension assembly component excessively bent |2.3.1| | 3 |
| Throttle operating incorrectly |6.2.1f| | 3 |
| Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 3 |
| 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| | 3 |
| Rear position lamp does not illuminate immediately when it is switched on |1.1.3a| | 3 |
| Roller brake test The less effective brake control does not achieve an efficiency of 25%. |3.3.A2b| | 3 |
| Front wheel bearings have excessive free play |2.3.5b| | 3 |
| Front Brake disc|s| friction surface contaminated by oil or grease |3.2.A1k| | 3 |
| Front shock absorber seal failed and leaking oil |2.3.3| | 3 |
| Handlebar deformed |2.1.1b| | 3 |
| Headlamp switch faulty |1.2.4| | 3 |
| Nearside Front Front shock absorber seal failed and leaking oil |2.3.3| | 3 |
| Rear wheel rotation likely to be impeded |6.2.1b| | 2 |
| Front Brake disc|s| excessively worn |3.2.A1l| | 2 |
| Headlamp dipped beam affected by the operation of another lamp |1.2.2c| | 2 |
| Headlamp main beam affected by the operation of another lamp |1.2.2c| | 2 |
| Headlamp at least one does not illuminate on main beam |1.2.2a|ii|| | 2 |
| Front position lamp does not illuminate immediately when switched on |1.1.3a| | 2 |
| Headlamp insecure |1.2.3b| | 2 |
| Exhaust has part of the system missing |7.1.1a| | 2 |
| Front Brake disc|s| has excessive run out |3.2.A1m| | 2 |
| Rear Brake lining|s| less than 1.5 mm thick |3.2.A1f|i|| | 2 |
| Wheel alignment incorrect which adversely affects the steering |2.5.1| | 2 |
| Steering movement excessively `notchy` with the wheel raised |2.2.1b| | 2 |
| Offside Front Front shock absorber seal failed and leaking oil |2.3.3| | 2 |
| Rear Rear reflector on motorcycle missing |1.4.1| | 2 |
| Offside Front Brake lever is so short and the brake cannot be readily applied |3.1.3c| | 1 |
| Exhaust mounting does not fully support the exhaust system |7.1.1.c| | 1 |
| Rear position lamp deteriorated and function impaired |1.1.1b| | 1 |
| Fairings insecure and likely to impede the steering |2.1.2e| | 1 |
| Rear Roller brake test indicates a severely grabbing brake |3.3.A1b| | 1 |
| Offside Rear Direction indicator not working |1.5.1c| | 1 |
| Headlamp deteriorated and function impaired |1.2.3a| | 1 |
| Handlebar mounting clamp loose |2.1.1a| | 1 |
| Offside Front Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 1 |
| Nearside Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 1 |
| Brake lever has inadequate reserve travel |3.1.3b| | 1 |
| Front suspension assembly component excessively misaligned |2.3.1| | 1 |
| Offside 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| | 1 |
| Exhaust mounting missing |7.1.1c| | 1 |
| Offside Front shock absorber seal failed and leaking oil |2.3.3| | 1 |
| Horn not loud enough to be heard by another road user |1.7.3a| | 1 |
| Rear position lamp missing |1.1.1a| | 1 |
| Stop lamp missing |1.3.3a| | 1 |
| Rear Direction indicators not working |1.5.1c| | 1 |
| Rear Exhaust is leaking and excessively noisey |7.1.1b| | 1 |
| Rear Rear position lamp does not illuminate immediately when it is switched on |1.1.3a| | 1 |
| Steering movement excessively stiff with the weight on the lower bearing |2.2.1a| | 1 |
| Lower Exhaust mounting does not fully support the exhaust system |7.1.1.c| | 1 |
| Rear shock absorber has inadequate damping effect. |2.4.A.3b| | 1 |
| Rear suspension component excessively corroded. |2.4.A.1a| | 1 |
| Rear Wheel damaged significantly reducing the original strength |4.2.1a| | 1 |
| Front Fairings insecure and likely to impede the steering |2.1.2e| | 1 |
| Rear Fairings insecure and likely to impede the steering |2.1.2e| | 1 |
| Steering movement excessively `notchy` with the weight on the lower bearing |2.2.1a| | 1 |
| Front Motorcycle structure excessively distorted |6.1.1a| | 1 |
| Front Steering headbearing has excessive free play |2.2.2| | 1 |
| Front Handlebar deformed |2.1.1b| | 1 |
| Leg shield so located that it is likely to impede the steering |2.1.2e| | 1 |
| Rear Brake lever mounting cracked |3.1.2c| | 1 |
| Front Roller brake test indicates excessive fluctuation of brake effort |3.3.A1d| | 1 |
| Motorcycle structure insecure and likely to affect the correct functioning of the steering or braking |6.1.1c| | 1 |
| Front Front wheel bearings have excessive free play |2.3.5b| | 1 |
| Offside Front Brake lever attachment screws loose |3.1.2b| | 1 |
| Front Steering linkage has excessive free play |2.2.2| | 1 |
| Nearside Front shock absorber seal failed and leaking oil |2.3.3| | 1 |
| Nearside Rear Direction indicator not working |1.5.1c| | 1 |
| Front Rear position lamp does not illuminate immediately when it is switched on |1.1.3a| | 1 |
| Rear Rear reflector on motorcycle obscured |1.4.1| | 1 |
| Rear position lamp damaged and function impaired |1.1.1b| | 1 |
| Headlamp aim not tested |1.6| | 1 |
| Rear wheel bearings have excessive free play |2.4.A.2c| | 1 |
| Position lamp switch faulty |1.1.4a| | 1 |
| Rear Brake lever cannot be applied smoothly |3.1.3d| | 1 |
| Headlamp insecure faring panel loose |1.2.3b| | 1 |
| Stop lamp does not illuminate immediately a brake applies not working |1.3.1a| | 1 |
| Front Brake component worn and seriously reduced in strength |3.2.A1| | 1 |
| Steering headbearing has excessive wear or free play |2.2.2 |f| |i|| | 1 |
| Handlebar so insecure it is likely to become detached |2.2.1 |b| |ii|| | 1 |
| Rear Shock absorber has negligible damping effect |5.3.2 |b|| | 1 |
| Front Brake lever not releasing correctly and functionality of brakes affected |1.1.2 |b| |ii|| | 1 |
| Motorcycle structure joining/attachment plate or fastening insecure centre stand |6.1.1 |b| |i|| | 1 |
| Headlamp aim headlamp deteriorated and function impaired |1.2.3a| | 1 |
| Rear Rear shock absorber has inadequate damping effect. |2.4.A.3b| | 1 |
| Front Stop lamp not working (4.3.1 (a) (ii)) | 1 |
| Motorcycle structure joining/attachment plate or fastening insecure stand spring weak (6.1.1 (b) (i)) | 1 |