| Most common failures | No# failures |
|---|
| Headlamp aim out of alignment | 12 |
| Drive chain excessively loose |6.2.1d| | 10 |
| Headlamp at least one does not illuminate on dipped beam |1.2.2a|i|| | 8 |
| Drive chain excessively loose |6.1.7 |c| |i|| | 4 |
| Front Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 4 |
| Rear position lamp does not illuminate immediately when it is switched on |1.1.3a| | 3 |
| Registration plate issues | 3 |
| Drive chain excessively loose (6.1.7 (c) (i)) | 3 |
| Drive chain worn to excess |6.1.7 |c| |i|| | 3 |
| Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 3 |
| Drive chain worn to excess |6.2.1e| | 3 |
| Steering headbearing has excessive free play |2.2.2| | 2 |
| Front Stop lamp not working (4.3.1 (a) (ii)) | 2 |
| Drive chain so loose it is likely to fail (6.1.7 (c) (ii)) | 2 |
| Roller brake test Neither brake control achieves an efficiency of 25% |1.2.2 |a| |i|| | 2 |
| Rear Footrest missing |6.2.12 |a|| | 2 |
| Drive chain sprocket worn to excess |6.2.1e| | 2 |
| Rear Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 2 |
| Nearside Rear Footrest missing |6.2.1a| | 2 |
| Offside Rear Footrest missing |6.2.1a| | 2 |
| Drive chain so worn it is likely to fail |6.1.7 |c| |ii|| | 1 |
| Drive chain so loose it is likely to fail |6.1.7 |c| |ii|| | 1 |
| Offside Footrest missing |6.2.1a| | 1 |
| Nearside Footrest insecure |6.2.1a| | 1 |
| Headlamp not working on dipped beam (4.1.1 (a) (ii)) | 1 |
| Nearside Rear Drive chain excessively loose (6.1.7 (c) (i)) | 1 |
| Front Floor brake test indicates a binding brake |3.3.C2c| | 1 |
| Front Stop lamp does not illuminate immediately a brake applies Front brake switch |1.3.1a| | 1 |
| Nearside Rear Rear shock absorber seal failed and leaking oil |2.4.A.1c| | 1 |
| Steering headbearing has excessive wear or free play |2.2.2 |f| |i|| | 1 |
| Rear Brake lining(s) less than 1.0 mm thick (1.1.13 (a)) | 1 |
| Horn sound not in accordance with requirements (7.7 (c)) | 1 |
| All direction indicators not working not working when engine revved (4.4.1 (a) (ii)) | 1 |
| Front Brake hose excessively twisted |3.2.B3a| | 1 |
| Brake pedal cannot be applied smoothly |3.1.3d| | 1 |
| Roller brake test No brake control achieves an efficiency of 30%. |3.3.A2a| | 1 |
| Roller brake test Neither brake control achieves an efficiency of 25% |3.3.A2b| | 1 |
| Nearside Direction indicators not working |1.5.1c| | 1 |
| Horn not working |1.7.3a| | 1 |
| Horn is not continous or uniform |1.7.3c| | 1 |
| Nearside Front Direction indicator obscured |1.5.1a| | 1 |
| Front Direction indicator insecure |1.5.3b| | 1 |
| Nearside Footrest missing footrest rubber missing |6.2.1a| | 1 |
| Footrest insecure both footrest are loose and move |6.2.1a| | 1 |
| Stop lamp not working lever |4.3.1 |a| |ii|| | 1 |
| Rear Brake indicates excessive fluctuation of brake effort |1.2.1 |e|| | 1 |
| All position lamps do not illuminate immediately when switched on number plate light |1.1.3a| | 1 |
| Roller brake test The less effective brake control does not achieve an efficiency of 25% |1.2.2 |a| |i|| | 1 |
| Drive chain horseshoe locking device incorrectly fitted |6.1.7 |j| |i|| | 1 |
| All position lamps not working |4.2.1 |a|| | 1 |
| Stop lamp does not illuminate immediately a brake applies when handlebar lever applied |1.3.1a| | 1 |
| Rear Brake pedal pivots excessively worn brake pedal travels too far down |3.1.3a| | 1 |
| Stop lamp remains on when the brakes are released | 1 |
| Indicator switch defective |1.5.4| | 1 |
| Footrest missing |6.2.12 |a|| | 1 |
| Headlamp insecure |4.1.1 |c|| | 1 |
| Front Headlamp aim headlamp damaged and function impaired |1.2.3a| | 1 |
| Nearside Indicator switch defective |1.5.4| | 1 |
| Front Brake excessively binding |1.2.1 |f|| | 1 |
| Rear Brake grabbing severely |1.2.1 |c|| | 1 |
| Roller brake test brake efficiency less than 27.5% overall |1.2.2 |a| |ii|| | 1 |
| Rear Brake pedal has insufficient reserve travel (1.1.2 (a)) | 1 |
| Rear Brake reaction bracket insecure |3.2.A1j| | 1 |
| Rear Wheel spoke missing |4.2.1b| | 1 |
| Rear Drive chain sprocket so worn it is likely to fail rear sprocket bearing worn |6.1.7 |c| |ii|| | 1 |
| Nearside Rear Footrest insecure (6.2.12 (a)) | 1 |
| Offside Rear Footrest insecure (6.2.12 (a)) | 1 |
| Rear Brake lining|s| less than 1.5 mm thick |3.2.A1f|i|| | 1 |
| Wheel alignment incorrect which adversely affects the handling (2.4 (a)) | 1 |
| Offside Rear All direction indicators not working |4.4.1 |a| |ii|| | 1 |
| Footrest missing both rear |6.2.12 |a|| | 1 |
| Rear Stop lamp does not emit a steady light |1.3.1b| | 1 |
| Nearside Rear Shock absorber has a serious fluid leak |5.3.2 |b|| | 1 |
| Offside Rear Shock absorber has a serious fluid leak |5.3.2 |b|| | 1 |
| Headlamp not working on dipped beam |4.1.1 |a| |ii|| | 1 |
| Rear Motorcycle structure joining/attachment plate or fastening insecure brake anchor arm (6.1.1 (b) (i)) | 1 |
| Horn not working (7.7 (a) (ii)) | 1 |
| All direction indicators not working (4.4.1 (a) (ii)) | 1 |
| All direction indicators adversely affected by the operation of another lamp (4.4.3 (b)) | 1 |
| Rear Brake component insecure torque arm retaining bolt loose causing snatch on operation of brake |1.1.21 |c|| | 1 |
| Steering headbearing excessively stiff or notchy (2.2.2 (f) (i)) | 1 |
| Stop lamp not working (4.3.1 (a) (ii)) | 1 |
| Nearside Footrest insecure (6.2.12 (a)) | 1 |