| Most common failures | No# failures |
|---|
| Rear reflector on motorcycle missing |1.4.1| | 19 |
| Headlamp aim out of alignment | 13 |
| Headlamp aim beam image kick up to the offside |1.6| | 11 |
| Registration plate issues | 9 |
| Front Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 9 |
| Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 8 |
| Drive chain worn to excess |6.2.1e| | 6 |
| Rear position lamp does not illuminate immediately when it is switched on |1.1.3a| | 6 |
| Rear Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 6 |
| Nearside Handlebar handgrip not secure to handlebars. |2.1.1c| | 5 |
| Rear wheel bearings have excessive free play |2.4.A.2c| | 5 |
| Front position lamp does not illuminate immediately when switched on |1.1.3a| | 4 |
| Rear Rear wheel bearings have excessive free play |2.4.A.2c| | 4 |
| Offside Handlebar handgrip not secure to handlebars. |2.1.1c| | 4 |
| Rear Rear reflector on motorcycle missing |1.4.1| | 4 |
| 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| | 4 |
| Front shock absorber seal failed and leaking oil |2.3.3| | 4 |
| Front Wheel has an excessively distorted bead rim. |4.2.2| | 3 |
| Front Drive chain sprocket worn to excess |6.2.1e| | 3 |
| Throttle has a significant change in engine speed whilst moving the steering from lock to lock |2.1.4| | 3 |
| Drive chain excessively loose |6.2.1d| | 3 |
| Fuel cap sealing washer missing |7.2.2c| | 3 |
| Rear Drive chain sprocket worn to excess |6.2.1e| | 3 |
| Steering headbearing has excessive free play |2.2.2| | 3 |
| Rear Footrest missing |6.2.1a| | 3 |
| Rear Wheel spoke excessively loose |4.2.1b| | 3 |
| Horn not working |1.7.3a| | 3 |
| Headlamp at least one does not illuminate on main beam |1.2.2a|ii|| | 3 |
| Front Exhaust is leaking and excessively noisey |7.1.1b| | 2 |
| Brake lever has inadequate reserve travel |3.1.3b| | 2 |
| Nearside Rear Direction indicator not working |1.5.1c| | 2 |
| Locking device|s| not correctly fitted which may make the motor bicycle dangerous to ride |6.2.1h| | 2 |
| Handlebar deformed |2.1.1b| | 2 |
| Nearside Steering lock stop ineffective |2.1.3| | 2 |
| Rear Brake caliper|s| insecure |3.2.A1j| | 2 |
| Roller brake test No brake control achieves an efficiency of 30%. |3.3.A2a| | 2 |
| Riders seat insecure |6.2.1a| | 2 |
| Stop lamp affected by the operation of another lamp |1.3.2| | 2 |
| Offside Rear Footrest insecure |6.2.1a| | 2 |
| Direction indicators not working |1.5.1c| | 2 |
| Rear Direction indicator missing |1.5.1a| | 2 |
| Nearside Rear Direction indicator insecure |1.5.3b| | 2 |
| Nearside Rear Direction indicators not working |1.5.1c| | 2 |
| Offside Rear Direction indicators not working |1.5.1c| | 2 |
| Drive chain excessively tight |6.2.1d| | 2 |
| Offside Front Direction indicator insecure |1.5.3b| | 2 |
| Brake hose damaged | 2 |
| Clutch lever shortened so it cannot be readily operated. |6.2.1g| | 1 |
| Fuel cap sealing washer torn |7.2.2c| | 1 |
| Front Wheel spoke excessively loose |4.2.1b| | 1 |
| Rear Brake fluid reservoir leaking hydraulic fluid |3.2.B1e| | 1 |
| Nearside Front Steering lock stop ineffective |2.1.3| | 1 |
| Rear position lamp deteriorated and function impaired |1.1.1b| | 1 |
| Rear position lamp missing |1.1.1a| | 1 |
| Offside Direction indicator flashing less than 60 times a minute |1.5.1c| | 1 |
| Offside Direction indicator affected by the operation of another lamp |1.5.1c| | 1 |
| Lower Rear mono-shock pivot excessively worn |2.4.B.4| | 1 |
| Brake pedal cannot be applied smoothly |3.1.3d| | 1 |
| Front Headlamp aim beam image kick-up is to the offside |1.6.1| | 1 |
| Nearside Direction indicator not working |1.5.1c| | 1 |
| Rear reflector on motorcycle obscured |1.4.2b| | 1 |
| Rear mono-shock pivot excessively worn |2.4.B.4| | 1 |
| Offside Rear Direction indicator damaged and function impaired |1.5.3a| | 1 |
| Front Roller brake test indicates a sticking brake |3.3.A1a| | 1 |
| Headlamp insecure |1.2.3b| | 1 |
| Headlamp aim headlamp damaged and function impaired |1.2.3a| | 1 |
| Nearside Steering lock stop missing |2.1.3| | 1 |
| Offside Steering lock stop missing |2.1.3| | 1 |
| Nearside Rear Direction indicator incorrect colour |1.5.1b| | 1 |
| Offside Rear 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 |
| Nearside Drive chain worn to excess |6.2.1e| | 1 |
| Exhaust is leaking and excessively noisey |7.1.1b| | 1 |
| Front Upper Brake hose fouling |3.2.B3b| | 1 |
| Nearside Front Direction indicator incorrect colour |1.5.1b| | 1 |
| Offside Front Direction indicator incorrect colour |1.5.1b| | 1 |
| Rear Lower Brake hose fouling |3.2.B3b| | 1 |
| Front Brake lever cannot be applied smoothly |3.1.3d| | 1 |
| Rear Rear suspension bush has excessive free play |2.4.A2a|i|| | 1 |
| Fairings insecure and likely to impede the steering |2.1.2e| | 1 |
| Rear position lamp adversely affected by the operation of another lamp |1.1.3b| | 1 |
| Rear suspension has a modification which reduces the strength of a load bearing member or its supporting structure. |2.4.A.2d| | 1 |
| Horn is not a constant note |1.7.3c| | 1 |
| Rear Brake disc|s| excessively worn |3.2.A1l| | 1 |
| Exhaust excessively deteriorated |7.1.1a| | 1 |
| Motorcycle structure cracked |6.1.1a| | 1 |
| Nearside Front wheel spindle securing nut|s| loose |2.3.3a| | 1 |
| Rear Brake fluid reservoir insecurely mounted |3.2.B1a| | 1 |
| Headlamp aim headlamp deteriorated and function impaired |1.2.3a| | 1 |
| Front Headlamp at least one does not illuminate on dipped beam |1.2.2a|i|| | 1 |
| Offside Front Brake lever insecure |3.1.2a| | 1 |
| Front Exhaust mounting does not fully support the exhaust system |7.1.1.c| | 1 |
| Rear suspension bush has excessive free play |2.4.A2a|i|| | 1 |
| Rear position lamp incorrect colour |1.1.2b| | 1 |
| Exhaust mounting missing |7.1.1c| | 1 |
| Hydraulic brake control feels spongy |3.1.4a| | 1 |
| Braking system does not have an approriate system/s fitted according to its age |3.1.1| | 1 |
| Offside Footrest insecure |6.2.1a| | 1 |
| Nearside Front Direction indicator missing |1.5.1a| | 1 |
| Offside Front Direction indicator missing |1.5.1a| | 1 |
| Rear Brake pedal has inadequate reserve travel |3.1.3b| | 1 |
| Roller brake test The less effective brake control does not achieve an efficiency of 25%. |3.3.A2b| | 1 |
| Front Shock absorber has a serious fluid leak (5.3.2 (b)) | 1 |
| Front Direction indicator not working |1.5.1c| | 1 |
| Rear Wheel damaged significantly reducing the original strength |4.2.1a| | 1 |
| Nearside Front Lower Steering lock stop missing |2.1.3| | 1 |
| Rear Front mudguard insecure |2.3.7| | 1 |
| Rear Exhaust markings indicating not for road use or similar wording |7.1.4| | 1 |
| Headlamp at least one does not illuminate on dipped beam |1.2.2a|i|| | 1 |
| Front Brake lever has inadequate reserve travel |3.1.3b| | 1 |
| Footrest missing |6.2.1a| | 1 |
| Floor brake test The less effective brake control does not achieve an efficiency of 25%. |3.3.C1b| | 1 |
| Direction indicator not working |1.5.1c| | 1 |
| Front Direction indicator missing |1.5.1a| | 1 |
| Horn sounds harsh or grating |1.7.3c| | 1 |
| Direction indicators affected by the operation of another lamp |1.5.1c| | 1 |
| Offside Handlebar handgrip missing |2.1.1c| | 1 |
| Front Stop lamp remains on when the brake is released |1.3.1e| | 1 |
| Offside Front Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 1 |
| Nearside Front shock absorber seal failed and leaking oil |2.3.3| | 1 |
| Front Brake hose fouling |3.2.B3b| | 1 |
| Rear Wheel spoke missing |4.2.1b| | 1 |
| Nearside Footrest insecure |6.2.1a| | 1 |
| Front suspension has inadequate damping effect. |2.3.6c| | 1 |
| Rear Roller brake test indicates a binding brake |3.3.A1a| | 1 |
| Front Direction indicators flashing less than 60 times a minute |1.5.1c| | 1 |
| Rear Direction indicators flashing less than 60 times a minute |1.5.1c| | 1 |
| Rear wheel insecure |4.2.3b| | 1 |
| Rear wheel spindle securing nut locking device missing |2.4.A.2b| | 1 |
| Centre Rear Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 1 |
| Rear Drive chain worn to excess |6.2.1e| | 1 |
| Direction indicators flashing less than 60 times a minute |1.5.1c| | 1 |
| Horn not loud enough to be heard by another road user |1.7.3a| | 1 |
| Front suspension assembly has excessive free play in the pivot bearings. |2.3.2| | 1 |
| Rear All position lamps do not illuminate immediately when switched on |1.1.3a| | 1 |
| Locking devices not correctly fitted which may make the motor bicycle dangerous to ride |6.2.1h| | 1 |
| Exhaust mounting does not fully support the exhaust system |7.1.1.c| | 1 |
| Wheel alignment incorrect which adversely affects the steering |2.5.1| | 1 |
| Front wheel bearings have excessive free play |2.3.5b| | 1 |
| Steering movement excessively `notchy` with the wheel raised |2.2.1b| | 1 |
| Steering movement excessively stiff with the wheel raised |2.2.1b| | 1 |
| Nearside Rear Direction indicator missing |1.5.1a| | 1 |
| Front Stop lamp missing |1.3.3a| | 1 |
| Nearside Front Direction indicators not working |1.5.1c| | 1 |
| Offside Front Direction indicators not working |1.5.1c| | 1 |
| Rear suspension component loose |2.4.A.1a| | 1 |
| Fuel system component leaking |7.2.1a| | 1 |
| Front Brake hose excessively kinked |3.2.B3a| | 1 |
| Front Brake master cylinder leaking hydraulic fluid |3.2.B1e| | 1 |
| Front Brake lever is so short and the brake cannot be readily applied |3.1.3c| | 1 |
| Front Hydraulic brake control feels spongy |3.1.4a| | 1 |
| Wheel alignment incorrect which adversely affects the handling |2.5.1| | 1 |
| Rear Rear wheel insecure |4.2.3b| | 1 |
| Roller brake test Neither brake control achieves an efficiency of 25% |3.3.A2b| | 1 |