| Most common failures | No# failures |
|---|
| Headlamp aim out of alignment | 226 |
| Rear Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 84 |
| Front wheel bearings have excessive free play |2.3.5b| | 80 |
| Drive chain excessively loose |6.2.1d| | 79 |
| Front wheel bearings are excessively rough |2.3.5b| | 69 |
| Registration plate issues | 52 |
| Horn not working |1.7.3a| | 48 |
| Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 47 |
| Rear shock absorber has inadequate damping effect. |2.4.A.3b| | 37 |
| Drive chain worn to excess |6.2.1e| | 36 |
| Rear position lamp does not illuminate immediately when it is switched on |1.1.3a| | 33 |
| Headlamp at least one does not illuminate on dipped beam |1.2.2a|i|| | 31 |
| Rear Drive chain sprocket worn to excess |6.2.1e| | 29 |
| Offside Rear Footrest missing |6.2.1a| | 26 |
| Headlamp aim beam image kick up to the offside |1.6| | 26 |
| Front Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 24 |
| Rear reflector on motorcycle missing |1.4.1| | 23 |
| Offside Handlebar mounting clamp bolt loose |2.1.1a| | 23 |
| Nearside Handlebar mounting clamp bolt loose |2.1.1a| | 21 |
| Nearside Rear Footrest missing |6.2.1a| | 19 |
| Brake hose damaged | 19 |
| Steering headbearing has excessive free play |2.2.2| | 18 |
| Front Front wheel bearings are excessively rough |2.3.5b| | 18 |
| Locking device|s| not correctly fitted which may make the motor bicycle dangerous to ride |6.2.1h| | 17 |
| Roller brake test The less effective brake control does not achieve an efficiency of 25%. |3.3.A2b| | 17 |
| Front Front wheel bearings have excessive free play |2.3.5b| | 16 |
| Offside Front Direction indicator not working |1.5.1c| | 15 |
| Drive chain excessively tight |6.2.1d| | 14 |
| Rear Footrest missing |6.2.1a| | 14 |
| Nearside Front Direction indicator not working |1.5.1c| | 13 |
| Headlamp at least one does not illuminate on main beam |1.2.2a|ii|| | 12 |
| Handlebar mounting clamp bolt loose |2.1.1a| | 12 |
| Front position lamp does not illuminate immediately when switched on |1.1.3a| | 11 |
| Rear Rear shock absorber has inadequate damping effect. |2.4.A.3b| | 11 |
| Throttle operating incorrectly |6.2.1f| | 11 |
| Nearside Front Direction indicators not working |1.5.1c| | 11 |
| Rear wheel bearings have excessive free play |2.4.A.2c| | 11 |
| Headlamp insecure |1.2.3b| | 10 |
| Wheel alignment incorrect which adversely affects the handling |2.5.1| | 10 |
| Exhaust is leaking and excessively noisey |7.1.1b| | 9 |
| Rear suspension bearing has excessive free play |2.4.A2a|i|| | 9 |
| Indicator switch insecure |1.5.4| | 9 |
| Horn not loud enough to be heard by another road user |1.7.3a| | 8 |
| Offside Front Direction indicators not working |1.5.1c| | 8 |
| Offside Handlebar mounting clamp loose |2.1.1a| | 8 |
| Rear Brake pedal has inadequate reserve travel |3.1.3b| | 7 |
| Rear Hydraulic brake control feels spongy |3.1.4a| | 7 |
| Front Roller brake test indicates excessive fluctuation of brake effort |3.3.A1d| | 7 |
| Nearside Handlebar mounting clamp loose |2.1.1a| | 7 |
| Nearside Rear Direction indicators not working |1.5.1c| | 7 |
| Fairings insecure and likely to impede the steering |2.1.2e| | 7 |
| Drive chain sprocket carrier worn to excess |6.2.1e| | 7 |
| Brake pedal has inadequate reserve travel |3.1.3b| | 7 |
| Front Headlamp at least one does not illuminate on dipped beam |1.2.2a|i|| | 7 |
| Headlamp switch insecure |1.2.4| | 7 |
| Rear Shock absorber has negligible damping effect (5.3.2 (b)) | 7 |
| Nearside Front Direction indicator missing |1.5.1a| | 6 |
| Nearside Rear Direction indicator not working |1.5.1c| | 6 |
| Headlamp aim headlamp deteriorated and function impaired |1.2.3a| | 6 |
| Nearside Handlebar handgrip not secure to handlebars. |2.1.1c| | 6 |
| Exhaust mounting does not fully support the exhaust system |7.1.1.c| | 6 |
| Rear Brake fluid reservoir fluid level dangerously low |3.2.B1d| | 6 |
| Offside Rear Direction indicator incorrect colour |1.5.1b| | 6 |
| Nearside Rear Direction indicator insecure |1.5.3b| | 6 |
| Offside Rear Direction indicator not working |1.5.1c| | 6 |
| Nearside Front Footrest insecure |6.2.1a| | 6 |
| Brake pedal pivots excessively worn |3.1.3a| | 6 |
| Offside Front Handlebar mounting clamp bolt loose |2.1.1a| | 6 |
| Offside Front Direction indicator insecure |1.5.3b| | 6 |
| Rear Drive chain excessively loose |6.2.1d| | 6 |
| Offside Front Footrest insecure |6.2.1a| | 5 |
| Rear Drive chain worn to excess |6.2.1e| | 5 |
| Rear Exhaust mounting does not fully support the exhaust system |7.1.1.c| | 5 |
| Handlebar mounting clamp loose |2.1.1a| | 5 |
| Nearside Front Direction indicator incorrect colour |1.5.1b| | 5 |
| Indicator tell tale not functioning |1.5.2| | 5 |
| Nearside Footrest insecure |6.2.1a| | 5 |
| Rear Wheel alignment incorrect which adversely affects the handling |2.5.1| | 5 |
| Front Wheel has an excessively distorted bead rim. |4.2.2| | 5 |
| Fuel system component insecure |7.2.1b| | 5 |
| Offside Handlebar handgrip not secure to handlebars. |2.1.1c| | 5 |
| Offside Steering lock stop ineffective |2.1.3| | 5 |
| Rear Brake pedal pivots excessively worn |3.1.3a| | 5 |
| Rear suspension bush has excessive free play |2.4.A2a|i|| | 5 |
| Front Wheel bearing rough when rotated (5.1.3 (b) (i)) | 5 |
| Front Wheel bearing has excessive play (5.1.3 (a) (i)) | 5 |
| Offside Front Direction indicator missing |1.5.1a| | 4 |
| Offside Front shock absorber seal failed and leaking oil |2.3.3| | 4 |
| Rear mono-shock pivot excessively worn |2.4.B.4| | 4 |
| Rear Shock absorber has negligible damping effect |5.3.2 |b|| | 4 |
| Front Headlamp aim beam image kick up to the offside |1.6| | 4 |
| Rear Rear wheel bearings have excessive free play |2.4.A.2c| | 4 |
| Rear Brake disc|s| excessively worn |3.2.A1l| | 4 |
| Headlamp aim not tested |1.6| | 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 |
| Nearside Rear Footrest insecure |6.2.1a| | 4 |
| Nearside Front Front shock absorber seal failed and leaking oil |2.3.3| | 4 |
| Front Horn not working |1.7.3a| | 4 |
| Rear Brake hose is likely to be fouled or trapped by moving parts |3.2.B2c| | 4 |
| Nearside Front Direction indicator insecure |1.5.3b| | 4 |
| Headlamp aim headlamp damaged and function impaired |1.2.3a| | 4 |
| Offside Footrest insecure |6.2.1a| | 4 |
| Lower Rear suspension bush has excessive free play |2.4.A2a|i|| | 4 |
| Brake hose excessively deteriorated | 4 |
| Steering movement excessively `notchy` with the wheel raised |2.2.1b| | 4 |
| Front Brake disc|s| excessively worn |3.2.A1l| | 4 |
| Rear Position lamp not working (4.2.1 (a)) | 4 |
| Front Stop lamp not working (4.3.1 (a) (ii)) | 4 |
| 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 |
| Front Wheel bearing rough when rotated |5.1.3 |b| |i|| | 3 |
| Rear Rear reflector on motorcycle missing |1.4.1| | 3 |
| Fuel cap sealing washer missing |7.2.2c| | 3 |
| Rear Roller brake test indicates brake effort rise disproportional to brake lever or pedal effort |3.3.A1c| | 3 |
| Locking devices not correctly fitted which may make the motor bicycle dangerous to ride |6.2.1h| | 3 |
| Offside Rear Drive chain excessively loose |6.2.1d| | 3 |
| Rear suspension component loose |2.4.A.1a| | 3 |
| Offside Position lamp switch insecure |1.1.4b| | 3 |
| Rear shock absorber seal failed and leaking oil |2.4.A.1c| | 3 |
| Wheel alignment incorrect which adversely affects the steering |2.5.1| | 3 |
| Front Brake lever is so short and the brake cannot be readily applied |3.1.3c| | 3 |
| Nearside Indicator switch insecure |1.5.4| | 3 |
| Roller brake test No brake control achieves an efficiency of 30%. |3.3.A2a| | 3 |
| Rear Brake master cylinder fluid level dangerously low |3.2.B1d| | 3 |
| Fuel system component leaking |7.2.1a| | 3 |
| Offside Rear Direction indicators not working |1.5.1c| | 3 |
| Nearside Front Direction indicator damaged and function impaired |1.5.3a| | 3 |
| Nearside Front shock absorber seal failed and leaking oil |2.3.3| | 3 |
| Throttle operating incorrectly |6.2.7 |a| |i|| | 3 |
| Rear Brake locking device missing |3.2.A1e| | 3 |
| Front Brake locking device missing |3.2.A1e| | 3 |
| Offside Drive chain worn to excess |6.2.1e| | 3 |
| Rear Rear position lamp does not illuminate immediately when it is switched on |1.1.3a| | 3 |
| Direction indicators not working |1.5.1c| | 3 |
| Offside Front Front shock absorber seal failed and leaking oil |2.3.3| | 3 |
| Nearside Rear Direction indicator incorrect colour |1.5.1b| | 3 |
| Steering control fouling between components which interferes with the free movement of the steering |2.1.2a| | 3 |
| Nearside Position lamp switch insecure |1.1.4b| | 3 |
| Rear Brake disc|s| excessively scored |3.2.A1l| | 3 |
| Footrest missing |6.2.1a| | 3 |
| Offside Rear Drive chain worn to excess |6.2.1e| | 3 |
| Nearside Rear Footrest missing (6.2.12 (a)) | 3 |
| Headlamp not working on dipped beam (4.1.1 (a) (ii)) | 3 |
| Rear reflector missing (4.8.2 (a) (ii)) | 3 |
| Rear Rear reflector missing (4.8.2 (a) (ii)) | 3 |