| Most common failures | No# failures |
|---|
| Rear reflector on motorcycle missing |1.4.1| | 121 |
| Headlamp aim out of alignment | 98 |
| Drive chain excessively loose |6.2.1d| | 67 |
| Registration plate issues | 60 |
| Front Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 49 |
| Front Roller brake test indicates a binding brake |3.3.A1a| | 46 |
| Rear position lamp does not illuminate immediately when it is switched on |1.1.3a| | 39 |
| Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 34 |
| Drive chain worn to excess |6.2.1e| | 34 |
| Horn not working |1.7.3a| | 32 |
| Rear Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 31 |
| Offside Rear Footrest missing |6.2.1a| | 29 |
| Drive chain excessively tight |6.2.1d| | 24 |
| Direction indicators flashing more than 120 times per minute |1.5.1c| | 21 |
| Rear reflector missing (4.8.2 (a) (ii)) | 19 |
| Nearside Rear Footrest missing |6.2.1a| | 17 |
| Steering headbearing has excessive free play |2.2.2| | 15 |
| Rear Roller brake test indicates a binding brake |3.3.A1a| | 15 |
| Registration plate lamp issues | 15 |
| Indicator switch insecure |1.5.4| | 14 |
| Locking device|s| not correctly fitted which may make the motor bicycle dangerous to ride |6.2.1h| | 14 |
| Front Floor brake test indicates a binding brake |3.3.C2c| | 14 |
| Rear reflector on motorcycle obscured |1.4.1| | 13 |
| Nearside Direction indicators flashing more than 120 times per minute |1.5.1c| | 13 |
| Nearside Handlebar mounting clamp bolt loose |2.1.1a| | 13 |
| Rear Drive chain sprocket worn to excess |6.2.1e| | 13 |
| Nearside Direction indicator flashing more than 120 times per minute |1.5.1c| | 13 |
| Exhaust is leaking and excessively noisey |7.1.1b| | 13 |
| Offside Handlebar mounting clamp bolt loose |2.1.1a| | 12 |
| Rear Footrest missing |6.2.1a| | 12 |
| Rear shock absorber has inadequate damping effect. |2.4.A.3b| | 11 |
| Throttle operating incorrectly |6.2.1f| | 11 |
| Nearside Front shock absorber seal failed and leaking oil |2.3.3| | 10 |
| Offside Handlebar deformed |2.1.1b| | 9 |
| Nearside Handlebar deformed |2.1.1b| | 9 |
| Rear Shock absorber has negligible damping effect (5.3.2 (b)) | 9 |
| Offside Front Direction indicator not working |1.5.1c| | 7 |
| Exhaust mounting does not fully support the exhaust system |7.1.1.c| | 7 |
| Offside Rear Direction indicator not working |1.5.1c| | 7 |
| Rear Rear reflector on motorcycle missing |1.4.1| | 7 |
| Rear Rear position lamp does not illuminate immediately when it is switched on |1.1.3a| | 6 |
| Offside Direction indicator not working |1.5.1c| | 6 |
| Rear reflector missing |4.8.2 |a| |ii|| | 6 |
| Horn not working (7.7 (a) (ii)) | 6 |
| Front position lamp incorrect colour |1.1.2a| | 5 |
| Offside Direction indicators flashing more than 120 times per minute |1.5.1c| | 5 |
| Nearside Front Direction indicator not working |1.5.1c| | 5 |
| Nearside Rear Direction indicators not working |1.5.1c| | 5 |
| Stop lamp remains on when the brake is released |1.3.1e| | 5 |
| Rear Floor brake test indicates a binding brake |3.3.C2c| | 5 |
| Nearside Steering control has Insufficient clearance at full lock affecting the riders grasp of handlebars |2.1.2b| | 5 |
| Horn not loud enough to be heard by another road user |1.7.3a| | 5 |
| 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| | 5 |
| Nearside Handlebar handgrip not secure to handlebars. |2.1.1c| | 5 |
| Nearside Front Direction indicator insecure |1.5.3b| | 5 |
| Rear Roller brake test indicates a sticking brake |3.3.A1a| | 5 |
| Rear suspension bush has excessive free play |2.4.A2a|i|| | 5 |
| Nearside Front Direction indicators flashing more than 120 times per minute |1.5.1c| | 5 |
| Headlamp at least one does not illuminate on dipped beam |1.2.2a|i|| | 5 |
| Headlamp aim beam image kick up to the offside |1.6| | 5 |
| Front Direction indicator flashing more than 120 times per minute |1.5.1c| | 5 |
| Rear Direction indicator flashing more than 120 times per minute |1.5.1c| | 5 |
| Offside Direction indicator flashing more than 120 times per minute |1.5.1c| | 5 |
| Stop lamp remains on when the brakes are released | 5 |
| Nearside Rear Direction indicator not working |1.5.1c| | 4 |
| Headlamp insecure |1.2.3b| | 4 |
| Roller brake test The less effective brake control does not achieve an efficiency of 25%. |3.3.A2b| | 4 |
| Front Floor brake test indicates a sticking brake |3.3.C2c| | 4 |
| Front Drive chain sprocket worn to excess |6.2.1e| | 4 |
| Nearside Indicator switch insecure |1.5.4| | 4 |
| Rear Seat insecure |6.2.1a| | 4 |
| Rear suspension bearing has excessive free play |2.4.A2a|i|| | 4 |
| Rear Brake disc|s| excessively scored |3.2.A1l| | 4 |
| Rear Position lamp not working |4.2.1 |a|| | 4 |
| Offside Front shock absorber seal failed and leaking oil |2.3.3| | 4 |
| Rear Drive chain excessively tight |6.2.1d| | 4 |
| Offside Front Roller brake test indicates a binding brake |3.3.A1a| | 4 |
| Front Roller brake test indicates a sticking brake |3.3.A1a| | 4 |
| Nearside Front Direction indicator flashing more than 120 times per minute |1.5.1c| | 4 |
| Nearside Rear Direction indicator flashing more than 120 times per minute |1.5.1c| | 4 |
| Roller brake test Neither brake control achieves an efficiency of 25% |3.3.A2b| | 4 |
| Rear Brake pedal is bent and the brake cannot be readily applied |3.1.3c| | 4 |
| Nearside Handlebar mounting clamp loose |2.1.1a| | 4 |
| Front shock absorber seal failed and leaking oil |2.3.3| | 4 |
| Wheel alignment incorrect which adversely affects the handling |2.5.1| | 4 |
| Offside Rear Direction indicators flashing more than 120 times per minute |1.5.1c| | 4 |
| Offside Front Shock absorber has a serious fluid leak (5.3.2 (b)) | 4 |
| Offside Rear Footrest missing (6.2.12 (a)) | 4 |
| Exhaust mounting missing |7.1.1c| | 3 |
| Offside Drive chain excessively loose |6.2.1d| | 3 |
| Fuel system component insecure |7.2.1b| | 3 |
| Throttle has a significant change in engine speed whilst moving the steering from lock to lock |2.1.4| | 3 |
| Offside Steering lock stop ineffective |2.1.3| | 3 |
| Front position lamp does not illuminate immediately when switched on |1.1.3a| | 3 |
| Rear Stop lamp not working |4.3.1 |a| |ii|| | 3 |
| Handlebar mounting clamp loose |2.1.1a| | 3 |
| Handlebar deformed |2.1.1b| | 3 |
| Drive chain sprocket worn to excess |6.2.1e| | 3 |
| Horn not working |7.7 |a| |ii|| | 3 |
| Direction indicators not working |1.5.1c| | 3 |
| Indicator switch defective |1.5.4| | 3 |
| Rear Stop lamp remains on when the brake is released |1.3.1e| | 3 |
| Offside Handlebar handgrip not secure to handlebars. |2.1.1c| | 3 |
| Offside Front Direction indicator damaged and function impaired |1.5.3a| | 3 |
| Nearside Front Direction indicator missing |1.5.1a| | 3 |
| Nearside Front Footrest insecure |6.2.1a| | 3 |
| Rear Rear reflector missing |4.8.2 |a| |ii|| | 3 |
| Nearside Rear Direction indicators flashing more than 120 times per minute |1.5.1c| | 3 |
| Rear mono-shock pivot excessively worn |2.4.B.4| | 3 |
| Roller brake test No brake control achieves an efficiency of 30%. |3.3.A2a| | 3 |
| Offside Front Direction indicator missing |1.5.1a| | 3 |
| Front Brake excessively binding |1.2.1 |f|| | 3 |
| Fairings insecure and likely to impede the steering |2.1.2e| | 3 |
| Steering control fouling between components which interferes with the free movement of the steering |2.1.2a| | 3 |
| Front Stop lamp not working |4.3.1 |a| |ii|| | 3 |
| Steering headbearing has excessive wear or free play (2.2.2 (f) (i)) | 3 |
| Roller brake test The less effective brake control does not achieve an efficiency of 25% (1.2.2 (a) (i)) | 3 |
| Rear Brake excessively binding (1.2.1 (f)) | 3 |
| Nearside Rear Footrest missing (6.2.12 (a)) | 3 |
| Headlamp aim so that beam "kick up" is not visible on the screen (4.1.2 (a)) | 3 |
| Horn not working (7.7 (a)) | 3 |