| Most common failures | No# failures |
|---|
| Headlamp aim out of alignment | 177 |
| Steering headbearing has excessive free play |2.2.2| | 81 |
| Rear reflector on motorcycle missing |1.4.1| | 70 |
| Exhaust is leaking and excessively noisey |7.1.1b| | 62 |
| Rear shock absorber has inadequate damping effect. |2.4.A.3b| | 55 |
| Nearside Front shock absorber seal failed and leaking oil |2.3.3| | 37 |
| Fuel cap sealing washer missing |7.2.2c| | 37 |
| Indicator tell tale not functioning |1.5.2| | 37 |
| Offside Front shock absorber seal failed and leaking oil |2.3.3| | 35 |
| Registration plate issues | 33 |
| Headlamp at least one does not illuminate on dipped beam |1.2.2a|i|| | 30 |
| Front shock absorber seal failed and leaking oil |2.3.3| | 27 |
| Front Steering headbearing has excessive free play |2.2.2| | 25 |
| Roller brake test The less effective brake control does not achieve an efficiency of 25%. |3.3.A2b| | 23 |
| Horn not working |1.7.3a| | 22 |
| Rear Brake lever has inadequate reserve travel |3.1.3b| | 21 |
| Rear reflector on motorcycle obscured |1.4.1| | 20 |
| Exhaust mounting does not fully support the exhaust system |7.1.1.c| | 20 |
| Rear Rear shock absorber has inadequate damping effect. |2.4.A.3b| | 19 |
| Rear wheel bearings have excessive free play |2.4.A.2c| | 17 |
| Rear Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 16 |
| Nearside 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 Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 15 |
| Rear Rear reflector on motorcycle missing |1.4.1| | 15 |
| Wheel alignment incorrect which adversely affects the steering |2.5.1| | 13 |
| Direction indicators not working |1.5.1c| | 13 |
| Front wheel bearings have excessive free play |2.3.5b| | 13 |
| Front Brake disc|s| friction surface contaminated by oil or grease |3.2.A1k| | 12 |
| Front Headlamp at least one does not illuminate on dipped beam |1.2.2a|i|| | 12 |
| Rear position lamp does not illuminate immediately when it is switched on |1.1.3a| | 11 |
| Front Front mudguard insecure |2.3.7| | 11 |
| Headlamp insecure |1.2.3b| | 11 |
| Front Fairings insecure and likely to impede the steering |2.1.2e| | 10 |
| Front Front shock absorber seal failed and leaking oil |2.3.3| | 10 |
| Rear suspension bush has excessive free play |2.4.A2a|i|| | 10 |
| Front Brake lever is so short and the brake cannot be readily applied |3.1.3c| | 10 |
| Nearside Front Direction indicator not working |1.5.1c| | 9 |
| Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 9 |
| Rear shock absorber seal failed and leaking oil |2.4.A.1c| | 9 |
| Throttle operating incorrectly |6.2.1f| | 8 |
| Riders seat insecure |6.2.1a| | 8 |
| Horn not loud enough to be heard by another road user |1.7.3a| | 8 |
| Front wheel bearings are excessively rough |2.3.5b| | 8 |
| Exhaust excessively deteriorated |7.1.1a| | 8 |
| Rear Brake disc|s| excessively scored |3.2.A1l| | 8 |
| Headlamp aim headlamp deteriorated and function impaired |1.2.3a| | 8 |
| Headlamp at least one does not illuminate on main beam |1.2.2a|ii|| | 8 |
| Roller brake test No brake control achieves an efficiency of 30%. |3.3.A2a| | 8 |
| Nearside Rear Direction indicator not working |1.5.1c| | 8 |
| Nearside Rear Direction indicator insecure |1.5.3b| | 7 |
| Rear Roller brake test indicates a binding brake |3.3.A1a| | 7 |
| Offside Front Direction indicator not working |1.5.1c| | 7 |
| Front position lamp does not illuminate immediately when switched on |1.1.3a| | 7 |
| Front Exhaust is leaking and excessively noisey |7.1.1b| | 7 |
| Nearside Handlebar handgrip not secure to handlebars. |2.1.1c| | 7 |
| Front Headlamp insecure |1.2.3b| | 7 |
| Handlebar mounting clamp bolt loose |2.1.1a| | 7 |
| Rear wheel insecure |4.2.3b| | 6 |
| Fuel system component leaking |7.2.1a| | 6 |
| Front Roller brake test indicates a binding brake |3.3.A1a| | 6 |
| Rear suspension bush excessively deteriorated |2.4.A2a|i|| | 6 |
| 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| | 6 |
| Rear Brake lever is so short and the brake cannot be readily applied |3.1.3c| | 6 |
| Indicator switch insecure |1.5.4| | 6 |
| Rear Brake lining|s| less than 1.5 mm thick |3.2.A1f|i|| | 6 |
| Rear Rear wheel bearings have excessive free play |2.4.A.2c| | 6 |
| Wheel alignment incorrect which adversely affects the handling |2.5.1| | 6 |
| Fairings insecure and likely to impede the steering |2.1.2e| | 6 |
| Front mudguard insecure |2.3.7| | 6 |
| Rear Brake disc|s| excessively worn |3.2.A1l| | 5 |
| Front suspension has inadequate damping effect. |2.3.6c| | 5 |
| Offside Front Direction indicators not working |1.5.1c| | 5 |
| Offside Handlebar handgrip not secure to handlebars. |2.1.1c| | 5 |
| Rear Front mudguard insecure |2.3.7| | 5 |
| Rear Wheel has an excessively distorted bead rim. |4.2.2| | 5 |
| Brake hose damaged | 5 |
| Nearside Front Direction indicators not working |1.5.1c| | 5 |
| Front Direction indicators not working |1.5.1c| | 5 |
| An item not tested |Manual| | 5 |
| Offside Rear Direction indicators not working |1.5.1c| | 5 |
| Front Front wheel bearings have excessive free play |2.3.5b| | 4 |
| Offside Rear Direction indicator not working |1.5.1c| | 4 |
| Front Horn not working |1.7.3a| | 4 |
| Rear Exhaust is leaking and excessively noisey |7.1.1b| | 4 |
| Front position lamp insecure |1.1.1c| | 4 |
| Roller brake test Neither brake control achieves an efficiency of 25% |3.3.A2b| | 4 |
| Steering control handlebar movement restricted by trapped cables |2.1.2c| | 4 |
| Exhaust mounting missing |7.1.1c| | 4 |
| Steering movement excessively `notchy` with the wheel raised |2.2.1b| | 4 |
| Rear wheel spindle securing nut|s| loose |2.4.A.2b| | 4 |
| Fuel pipe leaking |7.2.1a| | 4 |
| Rear Roller brake test indicates brake effort fall disproportional to brake lever or pedal effort |3.3.A1c| | 4 |
| Rear Direction indicators not working |1.5.1c| | 4 |
| Rear wheel rotation likely to be impeded |6.2.1b| | 4 |
| Front suspension has excessive stiffness in the suspension movement. |2.3.6b| | 4 |
| Front Front wheel bearings are excessively rough |2.3.5b| | 4 |
| Headlamp aim headlamp damaged and function impaired |1.2.3a| | 4 |
| Rear Hydraulic brake control feels spongy |3.1.4a| | 4 |
| Exhaust has part of the system missing |7.1.1a| | 3 |
| Offside Front Direction indicator insecure |1.5.3b| | 3 |
| Steering headbearing has excessive wear or free play (2.2.2 (f) (i)) | 3 |
| Nearside Front Shock absorber has a serious fluid leak (5.3.2 (b)) | 3 |
| Front Front suspension has inadequate damping effect. |2.3.6c| | 3 |
| Direction indicators flashing more than 120 times per minute |1.5.1c| | 3 |
| Nearside Rear Direction indicators not working |1.5.1c| | 3 |
| Stop lamp remains on when the brake is released |1.3.1e| | 3 |
| Direction indicator not working |1.5.1c| | 3 |
| Front Brake lever has inadequate reserve travel |3.1.3b| | 3 |
| Rear position lamp insecure |1.1.1c| | 3 |
| Front Upper Steering headbearing has excessive free play |2.2.2| | 3 |
| Headlamp aim not tested |1.6| | 3 |
| Rear Brake lever is bent and the brake cannot be readily applied |3.1.3c| | 3 |
| Rear Rear reflector on motorcycle obscured |1.4.1| | 3 |
| Steering movement excessively stiff with the wheel raised |2.2.1b| | 3 |
| Rear Brake disc|s| friction surface contaminated by oil or grease |3.2.A1k| | 3 |
| Front Motorcycle structure insecure and likely to affect the correct functioning of the steering or braking |6.1.1c| | 3 |
| Nearside Front Direction indicator incorrect colour |1.5.1b| | 3 |
| Rear Rear position lamp does not illuminate immediately when it is switched on |1.1.3a| | 3 |
| Rear Roller brake test indicates a sticking brake |3.3.A1a| | 3 |
| Rear Rear shock absorber seal failed and leaking oil |2.4.A.1c| | 3 |
| Rear Rear suspension bush has excessive free play |2.4.A2a|i|| | 3 |
| Offside Rear Direction indicator insecure |1.5.3b| | 3 |
| Headlamp dipped beam flickers when tapped lightly by hand |1.2.2c| | 3 |
| Nearside Front Direction indicator damaged and function impaired |1.5.3a| | 3 |
| Front Brake hose is likely to be fouled or trapped by moving parts |3.2.B2c| | 3 |
| Rear wheel has a loose wheel nut|s| |4.2.3a| | 3 |
| Nearside Front Direction indicator insecure |1.5.3b| | 3 |
| Front Brake disc|s| excessively scored |3.2.A1l| | 3 |