| Most common failures | No# failures |
|---|
| Headlamp aim out of alignment | 43 |
| Rear reflector on motorcycle missing |1.4.1| | 30 |
| Front Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 28 |
| Rear Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 17 |
| Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 15 |
| Headlamp at least one does not illuminate on dipped beam |1.2.2a|i|| | 12 |
| Rear Brake lever has inadequate reserve travel |3.1.3b| | 11 |
| Rear Rear reflector on motorcycle missing |1.4.1| | 10 |
| Offside Front shock absorber seal failed and leaking oil |2.3.3| | 10 |
| Nearside Front Direction indicator insecure |1.5.3b| | 9 |
| Exhaust is leaking and excessively noisey |7.1.1b| | 9 |
| Rear position lamp does not illuminate immediately when it is switched on |1.1.3a| | 7 |
| Headlamp insecure |1.2.3b| | 7 |
| Registration plate issues | 7 |
| Nearside Front shock absorber seal failed and leaking oil |2.3.3| | 7 |
| Headlamp dipped beam affected by the operation of another lamp |1.2.2c| | 6 |
| Headlamp main beam affected by the operation of another lamp |1.2.2c| | 6 |
| Offside Front Direction indicator insecure |1.5.3b| | 5 |
| Rear reflector on motorcycle obscured |1.4.1| | 5 |
| Front Headlamp insecure |1.2.3b| | 5 |
| Horn not working |1.7.3a| | 5 |
| Steering movement excessively `notchy` with the wheel raised |2.2.1b| | 4 |
| Headlamp at least one does not illuminate on main beam |1.2.2a|ii|| | 4 |
| Front Direction indicator insecure |1.5.3b| | 4 |
| Front Roller brake test indicates excessive fluctuation of brake effort |3.3.A1d| | 4 |
| Front Stop lamp remains on when the brake is released |1.3.1e| | 4 |
| Roller brake test The less effective brake control does not achieve an efficiency of 25%. |3.3.A2b| | 4 |
| Rear Stop lamp remains on when the brake is released |1.3.1e| | 4 |
| Nearside Front Front shock absorber seal failed and leaking oil |2.3.3| | 3 |
| Front position lamp does not illuminate immediately when switched on |1.1.3a| | 3 |
| Wheel alignment incorrect which adversely affects the steering |2.5.1| | 3 |
| Motorcycle structure insecure and likely to affect the correct functioning of the steering or braking |6.1.1c| | 3 |
| Front Front position lamp insecure |1.1.1c| | 3 |
| Rear Rear suspension bush has excessive free play |2.4.A2a|i|| | 3 |
| Stop lamp affected by the operation of another lamp |1.3.2| | 3 |
| Front Horn not working |1.7.3a| | 3 |
| Direction indicators not working |1.5.1c| | 3 |
| Front position lamp insecure |1.1.1c| | 3 |
| Front Headlamp at least one does not illuminate on dipped beam |1.2.2a|i|| | 3 |
| Rear Exhaust is leaking and excessively noisey |7.1.1b| | 3 |
| Fuel cap sealing washer missing |7.2.2c| | 3 |
| Horn control not readily accesible. |1.7.2a| | 2 |
| Front Stop lamp does not illuminate immediately a brake applies (1.3.1a) | 2 |
| Front suspension assembly component excessively misaligned |2.3.1| | 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 |
| Offside Front Direction indicator incorrect colour |1.5.1b| | 2 |
| Direction indicators affected by the operation of another lamp |1.5.1c| | 2 |
| Horn is not a constant note |1.7.3c| | 2 |
| Front Front wheel bearings are excessively rough |2.3.5b| | 2 |
| Front Front mudguard insecure |2.3.7| | 2 |
| Offside Front Front shock absorber seal failed and leaking oil |2.3.3| | 2 |
| Rear Rear shock absorber has inadequate damping effect. |2.4.A.3b| | 2 |
| Horn not working |7.7 |a| |ii|| | 2 |
| Front Front position lamp does not illuminate immediately when switched on |1.1.3a| | 2 |
| Nearside Front Direction indicator damaged and function impaired |1.5.3a| | 2 |
| Front Front shock absorber seal failed and leaking oil |2.3.3| | 2 |
| Direction indicators flashing less than 60 times a minute |1.5.1c| | 2 |
| Front Headlamp at least one does not illuminate on main beam |1.2.2a|ii|| | 2 |
| Horn sounds harsh or grating |1.7.3c| | 2 |
| Front Front wheel bearings have excessive free play |2.3.5b| | 2 |
| Offside Front Direction indicators not working |1.5.1c| | 2 |
| Front Brake lever is so short and the brake cannot be readily applied |3.1.3c| | 2 |
| Headlamp main beam affected by the operation of the horn |1.2.2c| | 2 |
| Headlamp dipped beam affected by the operation of the horn |1.2.2c| | 2 |
| Horn not loud enough to be heard by another road user |1.7.3a| | 2 |
| Direction indicator not working |1.5.1c| | 2 |
| Stop lamp affected by the operation of the horn |1.3.2| | 2 |
| Nearside Front suspension assembly component excessively bent |2.3.1| | 2 |
| Riders seat insecure |6.2.1a| | 2 |
| Offside Rear Direction indicator not working |1.5.1c| | 2 |
| Nearside Brake lever has inadequate reserve travel |3.1.3b| | 2 |
| Rear Rear position lamp does not illuminate immediately when it is switched on |1.1.3a| | 2 |
| Rear Rear reflector on motorcycle obscured |1.4.1| | 2 |
| Offside Rear Direction indicators not working |1.5.1c| | 2 |
| Front Brake disc|s| excessively worn |3.2.A1l| | 2 |
| Front Direction indicator affected by the operation of another lamp |1.5.1c| | 2 |
| Horn control defective |1.7.2a| | 2 |
| Front Front suspension assembly component excessively corroded. |2.3.1| | 2 |
| Front mudguard insecure |2.3.7| | 2 |
| Nearside Front Direction indicators not working |1.5.1c| | 2 |
| Nearside Front suspension assembly component excessively corroded. |2.3.1| | 2 |
| Offside Rear Direction indicator flashing less than 60 times a minute |1.5.1c| | 2 |
| Offside Front Direction indicator flashing less than 60 times a minute |1.5.1c| | 2 |
| Nearside Front Direction indicator flashing less than 60 times a minute |1.5.1c| | 2 |
| Nearside Rear Direction indicator flashing less than 60 times a minute |1.5.1c| | 2 |
| Front Brake pipe union leaking fluid |3.2.B4| | 1 |
| Steering movement excessively notchy with the wheel raised (2.2.1b) | 1 |
| Offside Front shock absorber seal failed and leaking oil (2.3.3) | 1 |
| Nearside Front Front shock absorber seal failed and leaking oil (2.3.3) | 1 |
| Steering headbearing has excessive free play (2.2.2) | 1 |
| Rear Stop lamp not working (4.3.1 (a) (ii)) | 1 |
| Stop lamp does not illuminate immediately a brake applies (1.3.1a) | 1 |
| Steering movement excessively stiff with the wheel raised |2.2.1b| | 1 |
| Stop lamp does not emit a steady light |1.3.1b| | 1 |
| Nearside Direction indicator insecure |1.5.3b| | 1 |
| Offside Direction indicator incorrect colour |1.5.1b| | 1 |
| Wheel alignment incorrect which adversely affects the handling |2.5.1| | 1 |
| Rear position lamp insecure |1.1.1c| | 1 |
| Upper Steering headbearing has excessive free play |2.2.2| | 1 |
| Lower Steering headbearing has excessive free play |2.2.2| | 1 |
| Offside Rear Footrest missing |6.2.1a| | 1 |
| Nearside Rear Footrest missing |6.2.1a| | 1 |
| Front Wheel alignment incorrect which adversely affects the steering |2.5.1| | 1 |
| Headlamp aim not tested |1.6| | 1 |
| Nearside Front suspension has inadequate damping effect. |2.3.6c| | 1 |
| Offside Front suspension has inadequate damping effect. |2.3.6c| | 1 |
| Front Headlamp light intensity severely reduced |4.1.4 |a|| | 1 |
| Rear All position lamps not working |4.2.1 |a|| | 1 |
| All position lamps adversely affected by the operation of another lamp |1.1.3b| | 1 |
| Nearside Front Brake disc|s| excessively scored |3.2.A1l| | 1 |
| Fairings insecure and likely to impede the steering |2.1.2e| | 1 |
| Front Fairings insecure and likely to impede the steering |2.1.2e| | 1 |
| Front Brake component is severely distorted |3.1.5| | 1 |
| Rear shock absorber insecurely mounted |2.4.A.3b| | 1 |
| Exhaust mounting missing |7.1.1c| | 1 |
| Front Motorcycle structure insecure and likely to affect the correct functioning of the steering or braking |6.1.1c| | 1 |
| Rear Direction indicators flashing less than 60 times a minute |1.5.1c| | 1 |
| Position lamp switch faulty |1.1.4a| | 1 |
| Rear Rear reflector on motorcycle obscured |1.4.2b| | 1 |
| Front Brake master cylinder leaking hydraulic fluid |3.2.B1e| | 1 |
| Front Roller brake test indicates a severely juddering brake |3.3.A1b| | 1 |
| Stop lamp not working |4.3.1 |a| |ii|| | 1 |
| Rear reflector on motorcycle insecure |1.4.2c| | 1 |
| Offside Front Brake lever cannot be applied smoothly |3.1.3d| | 1 |
| Stop lamp adversely affected by the operation of another lamp |4.3.3 |b|| | 1 |
| Offside Front Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 1 |
| Rear position lamp adversely affected by the operation of another lamp stoplight on instead of tail light |1.1.3b| | 1 |
| Nearside Rear Direction indicator not working |1.5.1c| | 1 |
| Front suspension assembly component excessively corroded. |2.3.1| | 1 |
| Rear wheel bearings are excessively rough |2.4.A.2c| | 1 |
| Offside Front suspension assembly component excessively bent |2.3.1| | 1 |
| Rear Front mudguard insecure |2.3.7| | 1 |
| Front Brake lever is positioned so that the brake cannot be readily applied |3.1.3c| | 1 |
| Stop lamp remains on when the brake is released |1.3.1e| | 1 |
| Front wheel bearings have excessive free play |2.3.5b| | 1 |
| Stop lamp obscured |1.3.1c| | 1 |
| Inner Lower Headlamp at least one does not illuminate on dipped beam |1.2.2a|i|| | 1 |
| Inner Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 1 |
| Nearside Lower Rear shock absorber seal failed and leaking oil |2.4.A.1c| | 1 |
| Centre Rear reflector on motorcycle missing |1.4.1| | 1 |
| Inner Rear Rear suspension bush has excessive free play |2.4.A2a|i|| | 1 |
| Front Upper Front position lamp does not illuminate immediately when switched on |1.1.3a| | 1 |
| Rear Fuel system component leaking |7.2.1a| | 1 |
| Headlamp aim beam image kick up to the offside |1.6| | 1 |
| Nearside Rear Direction indicator incorrect colour |1.5.1b| | 1 |
| Offside Exhaust mounting missing |7.1.1c| | 1 |
| Front shock absorber seal failed and leaking oil |2.3.3| | 1 |
| Front Brake lever is bent and the brake cannot be readily applied |3.1.3c| | 1 |
| Offside Rear Exhaust is leaking and excessively noisey |7.1.1b| | 1 |
| Front Roller brake test indicates brake effort rise disproportional to brake lever or pedal effort |3.3.A1c| | 1 |
| Rear Brake lever attachment screws loose |3.1.2b| | 1 |
| Front Front suspension assembly component loose |2.3.1| | 1 |
| Rear Stop lamp emits other than a steady red light |1.3.1b| | 1 |
| Exhaust excessively deteriorated |7.1.1a| | 1 |
| Front Exhaust is leaking and excessively noisey |7.1.1b| | 1 |
| Nearside Direction indicators flashing less than 60 times a minute |1.5.1c| | 1 |
| Offside Direction indicators flashing less than 60 times a minute |1.5.1c| | 1 |
| Offside Front Direction indicator damaged and function impaired |1.5.3a| | 1 |
| Nearside Front Direction indicator missing |1.5.1a| | 1 |
| Offside Front Direction indicator missing |1.5.1a| | 1 |
| Nearside Rear Direction indicator insecure |1.5.3b| | 1 |
| Offside Rear Direction indicator missing |1.5.1a| | 1 |
| Brake performance not tested |1.2.1 |g|| | 1 |
| Rear Brake excessively binding |1.2.1 |f|| | 1 |
| Headlamp switch faulty |1.2.4| | 1 |
| Front Brake disc|s| friction surface contaminated by oil or grease |3.2.A1k| | 1 |
| Motorcycle structure excessively damaged |6.1.1a| | 1 |
| Plate brake test No brake control achieves an efficiency of 30%. |3.3.B2a| | 1 |
| Front Brake disc|s| has excessive run out |3.2.A1m| | 1 |
| Rear suspension has a fracture of a load bearing member or its supporting structure. |2.4.A.2d| | 1 |
| Nearside Direction indicator flashing less than 60 times a minute |1.5.1c| | 1 |
| Offside Direction indicator flashing less than 60 times a minute |1.5.1c| | 1 |
| Rear Stop lamp affected by the operation of another lamp |1.3.2| | 1 |
| Dipswitch does not deflect the main beam/s, making them into dipped beam/s |1.2.2b|ii|| | 1 |
| Front Brake caliper|s| securing bolt|s| missing |3.2.A1j| | 1 |
| Rear Exhaust excessively deteriorated |7.1.1a| | 1 |
| Front Brake lever excessively damaged |3.2.A1c| | 1 |
| Front Brake component has restricted free movement and operation is likely to be impeded |3.2.A1h| | 1 |
| Brake performance not tested |3.3| | 1 |
| Front Roller brake test indicates a binding brake |3.3.A1a| | 1 |
| Roller brake test No brake control achieves an efficiency of 30%. |3.3.A2a| | 1 |
| Roller brake test Neither brake control achieves an efficiency of 25% |3.3.A2b| | 1 |
| Nearside Rear Direction indicators not working |1.5.1c| | 1 |
| Stop lamp remains on when the brakes are released | 1 |
| Rear Valve stem seriously damaged |5.2.3 |j|| | 1 |
| Offside Front suspension assembly component excessively corroded. |2.3.1| | 1 |
| Nearside Front Direction indicator not working |1.5.1c| | 1 |
| Rear position lamp adversely affected by the operation of the horn |1.1.3b| | 1 |
| Front Brake disc|s| securing bolt|s| missing disc bobbin missing |3.2.A1g| | 1 |
| Brake component is fractured front disc bobbins fractured. |3.1.5| | 1 |
| Direction indicators not working intermitant when suspension compressed. |1.5.1c| | 1 |
| Front Brake disc|s| securing bolt|s| missing front disc bobbin missing |3.2.A1g| | 1 |
| Brake component is fractured several bobbins in front disc. |3.1.5| | 1 |
| Rear Roller brake test indicates a binding brake |3.3.A1a| | 1 |
| Horn is not continous or uniform |1.7.3c| | 1 |
| Front Lower Front position lamp does not illuminate immediately when switched on |1.1.3a| | 1 |
| Steering headbearing has excessive free play |2.2.2| | 1 |
| Rear suspension component loose |2.4.A.1a| | 1 |
| Centre Rear Rear reflector on motorcycle missing |1.4.1| | 1 |
| Rear Brake lagging in operation (1.2.1 (d)) | 1 |
| Steering headbearing has excessive wear or free play (2.2.2 (f) (i)) | 1 |
| Rear reflector on motorcycle obscured |1.4.2b| | 1 |
| Front suspension has excessive stiffness in the suspension movement. |2.3.6b| | 1 |
| Offside Rear Direction indicator insecure |1.5.3b| | 1 |
| Front Steering headbearing has excessive free play |2.2.2| | 1 |
| Steering movement excessively `notchy` with the weight on the lower bearing |2.2.1a| | 1 |
| Front suspension assembly component excessively bent |2.3.1| | 1 |
| Rear Direction indicator affected by the operation of another lamp |1.5.1c| | 1 |