| Most common failures | No# failures |
|---|
| Headlamp aim out of alignment | 20 |
| Drive chain worn to excess |6.2.1e| | 11 |
| Drive chain excessively loose |6.2.1d| | 11 |
| Front Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 10 |
| Rear reflector on motorcycle missing |1.4.1| | 10 |
| Brake hose excessively deteriorated | 9 |
| Rear position lamp does not illuminate immediately when it is switched on |1.1.3a| | 9 |
| Rear suspension bush has excessive free play |2.4.A2a|i|| | 6 |
| Rear wheel bearings have excessive free play |2.4.A.2c| | 5 |
| Registration plate issues | 4 |
| Steering movement excessively stiff with the wheel raised |2.2.1b| | 4 |
| Nearside Rear Direction indicators not working |1.5.1c| | 4 |
| Wheel alignment incorrect which adversely affects the handling |2.5.1| | 4 |
| Wheel alignment incorrect which adversely affects the steering |2.5.1| | 4 |
| Horn not loud enough to be heard by another road user |1.7.3a| | 4 |
| Front position lamp does not illuminate immediately when switched on |1.1.3a| | 4 |
| Rear suspension movement is excessively stiff |2.4.A.3b| | 4 |
| Drive chain excessively tight |6.2.1d| | 4 |
| Headlamp at least one does not illuminate on dipped beam |1.2.2a|i|| | 4 |
| Offside Rear Direction indicator incorrect colour |1.5.1b| | 4 |
| Roller brake test The less effective brake control does not achieve an efficiency of 25%. |3.3.A2b| | 4 |
| Rear suspension bearing has excessive free play |2.4.A2a|i|| | 4 |
| Front wheel bearings are excessively rough |2.3.5b| | 4 |
| Steering headbearing has excessive free play |2.2.2| | 3 |
| Offside Rear Direction indicators not working |1.5.1c| | 3 |
| Front Wheel has an excessively distorted bead rim. |4.2.2| | 3 |
| Nearside Rear Footrest missing |6.2.1a| | 3 |
| Offside Rear Footrest missing |6.2.1a| | 3 |
| Headlamp aim beam image kick up to the offside |1.6| | 3 |
| Rear Drive chain worn to excess |6.2.1e| | 3 |
| Rear Drive chain sprocket worn to excess |6.2.1e| | 3 |
| Handlebar deformed |2.1.1b| | 3 |
| Nearside Rear Direction indicator incorrect colour |1.5.1b| | 3 |
| Rear mono-shock pivot excessively worn |2.4.B.4| | 3 |
| Throttle operating incorrectly |6.2.1f| | 3 |
| Headlamp at least one does not illuminate on main beam |1.2.2a|ii|| | 2 |
| Front Front position lamp does not illuminate immediately when switched on |1.1.3a| | 2 |
| Indicator switch insecure |1.5.4| | 2 |
| Direction indicator incorrect colour |1.5.1b| | 2 |
| Rear Roller brake test indicates a binding brake |3.3.A1a| | 2 |
| Motorcycle structure insecure and likely to affect the correct functioning of the steering or braking |6.1.1c| | 2 |
| Headlamp aim headlamp deteriorated and function impaired |1.2.3a| | 2 |
| Rear reflector missing (4.8.2 (a) (ii)) | 2 |
| Front Direction indicator incorrect colour |1.5.1b| | 2 |
| Rear Direction indicator incorrect colour |1.5.1b| | 2 |
| Fuel system component leaking |7.2.1a| | 2 |
| Front wheel bearings have excessive free play |2.3.5b| | 2 |
| Nearside Front Direction indicator not working |1.5.1c| | 2 |
| Offside Front Direction indicator not working |1.5.1c| | 2 |
| Rear reflector missing |4.8.2 |a| |ii|| | 2 |
| Direction indicators not working |1.5.1c| | 2 |
| Steering movement excessively stiff with the weight on the lower bearing |2.2.1a| | 2 |
| Front shock absorber seal failed and leaking oil |2.3.3| | 2 |
| Rear Brake fluid reservoir fluid level dangerously low |3.2.B1d| | 2 |
| Nearside Front shock absorber seal failed and leaking oil |2.3.3| | 2 |
| Lower Rear suspension bush has excessive free play |2.4.A2a|i|| | 2 |
| Exhaust excessively deteriorated |7.1.1a| | 2 |
| Horn not working |1.7.3a| | 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 |
| Brake pedal has inadequate reserve travel |3.1.3b| | 2 |
| Nearside Front Direction indicator incorrect colour |1.5.1b| | 2 |
| Offside Front Direction indicator incorrect colour |1.5.1b| | 2 |
| Nearside Handlebar handgrip not secure to handlebars. |2.1.1c| | 2 |
| Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 2 |
| Rear Locking devices not correctly fitted which may make the motor bicycle dangerous to ride |6.2.1h| | 1 |
| Rear Footrest missing |6.2.1a| | 1 |
| Position lamp switch insecure |1.1.4b| | 1 |
| Headlamp not working on dipped beam |4.1.1 |a| |ii|| | 1 |
| Rear Lower Suspension arm pin or bush excessively worn suspension linkage bush |5.3.4 |a| |i|| | 1 |
| Headlamp switch insecure |1.2.4| | 1 |
| Rear Rear suspension bush has excessive free play |2.4.A2a|i|| | 1 |
| Rear Rear mono-shock pivot excessively worn |2.4.B.4| | 1 |
| Front Wheel spoke cracked. |4.2.1b| | 1 |
| Front Brake disc|s| has excessive run out |3.2.A1m| | 1 |
| Rear Brake component worn and seriously reduced in strength |3.2.A1| | 1 |
| Rear Brake component has an inadequate repair |3.1.5| | 1 |
| Rear Brake component damaged and seriously reduced in strength |3.2.A1| | 1 |
| Rear Brake component defective due to a deliberate modification which significantly reduces the original strength |3.1.5| | 1 |
| Rear Brake disc|s| has excessive run out |3.2.A1m| | 1 |
| Fuel cap sealing washer torn |7.2.2c| | 1 |
| Rear Stop lamp remains on when the brake is released |1.3.1e| | 1 |
| Steering movement excessively `notchy` with the weight on the lower bearing |2.2.1a| | 1 |
| Brake hose damaged | 1 |
| Nearside Front Direction indicators flashing less than 60 times a minute |1.5.1c| | 1 |
| Headlamp switch faulty |1.2.4| | 1 |
| Nearside Drive chain sprocket worn to excess |6.2.1e| | 1 |
| Locking device|s| not correctly fitted which may make the motor bicycle dangerous to ride |6.2.1h| | 1 |
| Rear Suspension component modified so the suspension is inoperative very stiff and not returning (5.3.3 (c) (ii)) | 1 |
| Rear Footrest missing pillion footrests missing (6.2.12 (a)) | 1 |
| Rear Suspension component modified so the suspension is inoperative |5.3.3 |c| |ii|| | 1 |
| Rear Exhaust mounting missing |7.1.1c| | 1 |
| Nearside Direction indicators affected by the operation of another lamp |1.5.1c| | 1 |
| Offside Direction indicators affected by the operation of another lamp |1.5.1c| | 1 |
| Front position lamp adversely affected by the operation of another lamp |1.1.3b| | 1 |
| Rear position lamp adversely affected by the operation of another lamp |1.1.3b| | 1 |
| Rear shock absorber has inadequate damping effect. |2.4.A.3b| | 1 |
| Front Brake component has restricted free movement and operation is likely to be impeded |3.2.A1h| | 1 |
| Rear Lower Rear suspension bush excessively deteriorated |2.4.A2a|i|| | 1 |
| Front Lower Rear mono-shock pivot excessively worn |2.4.B.4| | 1 |
| Dipswitch does not deflect the main beam/s, making them into dipped beam/s |1.2.2b|ii|| | 1 |
| Brake pedal is inoperative |3.1.3c| | 1 |
| Rear Hydraulic brake control feels spongy |3.1.4a| | 1 |
| Drive chain so worn it is likely to fail (6.1.7 (c) (ii)) | 1 |
| Rear Wheel bearing rough when rotated (5.1.3 (b) (i)) | 1 |
| Nearside Rear Footrest missing (6.2.12 (a)) | 1 |
| Offside Rear Footrest missing (6.2.12 (a)) | 1 |
| Nearside Front Shock absorber has a serious fluid leak (5.3.2 (b)) | 1 |
| Offside Front Shock absorber has a serious fluid leak (5.3.2 (b)) | 1 |
| Front Brake lever has insufficient reserve travel (1.1.2 (a)) | 1 |
| Front Wheel bearing has excessive play (5.1.3 (a) (i)) | 1 |
| Rear Wheel bearing has excessive play (5.1.3 (a) (i)) | 1 |
| All direction indicators light intensity significantly reduced all (4.4.3 (a)) | 1 |
| Front Stop lamp not working (4.3.1 (a) (ii)) | 1 |
| Front Lower Suspension arm ball joint excessively worn (5.3.4 (a) (i)) | 1 |
| Rear Lower Suspension component pin or bush excessively worn |5.3.4 |a| |i|| | 1 |
| Offside Rear Roller brake test indicates brake effort fall disproportional to brake lever or pedal effort |3.3.A1c| | 1 |
| Centre Front Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 1 |
| Nearside Rear Drive chain excessively loose |6.2.1d| | 1 |
| Direction indicator not working |1.5.1c| | 1 |
| Front Roller brake test indicates a binding brake |3.3.A1a| | 1 |
| Lower Rear suspension bush excessively deteriorated |2.4.A2a|i|| | 1 |
| Rear reflector on motorcycle obscured |1.4.1| | 1 |
| Offside Front shock absorber seal failed and leaking oil |2.3.3| | 1 |
| Front Drive chain sprocket worn to excess |6.2.1e| | 1 |
| Rear Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 1 |
| Rear position lamp missing |1.1.1a| | 1 |
| Indicator tell tale not functioning |1.5.2| | 1 |
| Rear position lamp incorrect colour |1.1.2b| | 1 |
| Direction indicator insecure |1.5.3b| | 1 |
| Footrest missing |6.2.1a| | 1 |
| Rear Position lamp not working |4.2.1 |a|| | 1 |
| Drive chain sprocket worn to excess |6.2.1e| | 1 |
| Rear position lamp flickers when tapped lightly by hand |1.1.3c| | 1 |
| Front Headlamp at least one does not illuminate on dipped beam |1.2.2a|i|| | 1 |
| Headlamp dipped beam affected by the operation of another lamp |1.2.2c| | 1 |
| Hydraulic brake control feels spongy |3.1.4a| | 1 |
| Front Rear suspension bush has excessive free play |2.4.A2a|i|| | 1 |
| Rear shock absorber seal failed and leaking oil |2.4.A.1c| | 1 |
| Brake pedal cannot be released smoothly |3.1.3d| | 1 |
| Centre Motorcycle structure insecure and likely to affect the correct functioning of the steering or braking |6.1.1c| | 1 |
| Front Floor brake test indicates a binding brake |3.3.C2c| | 1 |
| Nearside Rear Direction indicator not working |1.5.1c| | 1 |
| Drive chain sprocket excessively loose |6.1.7 |c| |i|| | 1 |
| An item not tested |Manual| | 1 |
| Rear Brake back plate|s| insecure |3.2.A1j| | 1 |
| Rear Rear position lamp missing |1.1.1a| | 1 |
| Rear Drive chain excessively loose |6.2.1d| | 1 |
| Rear Rear mono-shock pivot seized |2.4.B.4| | 1 |
| Front Throttle operating incorrectly |6.2.1f| | 1 |
| Front Footrest missing |6.2.1a| | 1 |
| Fuel cap mounting flange/sealing method defective |7.2.2c| | 1 |
| Front position lamp incorrect colour |1.1.2a| | 1 |
| Rear Lower Rear suspension bush has excessive free play |2.4.A2a|i|| | 1 |
| Stop lamp remains on when the brakes are released | 1 |
| Drive chain sprocket carrier worn to excess |6.2.1e| | 1 |
| Indicator switch defective |1.5.4| | 1 |
| Offside Front Direction indicators not working |1.5.1c| | 1 |