| Most common failures | No# failures |
|---|
| Headlamp aim out of alignment | 113 |
| Front Roller brake test indicates a binding brake |3.3.A1a| | 71 |
| Rear reflector on motorcycle missing |1.4.1| | 42 |
| Drive chain excessively loose |6.2.1d| | 38 |
| Exhaust is leaking and excessively noisey |7.1.1b| | 34 |
| Front position lamp does not illuminate immediately when switched on |1.1.3a| | 29 |
| Front wheel bearings have excessive free play |2.3.5b| | 28 |
| Registration plate issues | 21 |
| Front wheel bearings are excessively rough |2.3.5b| | 19 |
| Front Floor brake test indicates a binding brake |3.3.C2c| | 17 |
| Exhaust excessively deteriorated |7.1.1a| | 16 |
| Rear Roller brake test indicates a binding brake |3.3.A1a| | 16 |
| Rear Rear reflector on motorcycle missing |1.4.1| | 16 |
| Drive chain worn to excess |6.2.1e| | 16 |
| Rear wheel bearings have excessive free play |2.4.A.2c| | 14 |
| Front Brake excessively binding (1.2.1 (f)) | 14 |
| Front Front position lamp does not illuminate immediately when switched on |1.1.3a| | 11 |
| Nearside Handlebar handgrip not secure to handlebars. |2.1.1c| | 11 |
| Offside Front shock absorber seal failed and leaking oil |2.3.3| | 11 |
| Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 10 |
| Rear shock absorber has inadequate damping effect. |2.4.A.3b| | 10 |
| Front Brake excessively binding |1.2.1 |f|| | 9 |
| Horn not working |1.7.3a| | 9 |
| Front Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 9 |
| Nearside Front Direction indicator not working |1.5.1c| | 9 |
| Rear Rear wheel bearings have excessive free play |2.4.A.2c| | 9 |
| Nearside Front shock absorber seal failed and leaking oil |2.3.3| | 9 |
| Front Front wheel bearings have excessive free play |2.3.5b| | 9 |
| Front Brake lever has inadequate reserve travel |3.1.3b| | 9 |
| Offside Front Front shock absorber seal failed and leaking oil |2.3.3| | 8 |
| Rear Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 8 |
| Rear Roller brake test indicates excessive fluctuation of brake effort |3.3.A1d| | 8 |
| Roller brake test The less effective brake control does not achieve an efficiency of 25%. |3.3.A2b| | 8 |
| Drive chain excessively tight |6.2.1d| | 8 |
| Rear position lamp does not illuminate immediately when it is switched on |1.1.3a| | 8 |
| Rear reflector missing (4.8.2 (a) (ii)) | 8 |
| Headlamp aim beam image kick up to the offside |1.6| | 7 |
| Offside Front Shock absorber has a serious fluid leak (5.3.2 (b)) | 7 |
| Rear reflector missing |4.8.2 |a| |ii|| | 6 |
| Wheel alignment incorrect which adversely affects the handling |2.5.1| | 6 |
| Rear Brake pedal has inadequate reserve travel |3.1.3b| | 6 |
| Headlamp at least one does not illuminate on dipped beam |1.2.2a|i|| | 6 |
| Drive chain sprocket carrier worn to excess |6.2.1e| | 6 |
| Front Roller brake test indicates a sticking brake |3.3.A1a| | 5 |
| Stop lamp remains on when the brakes are released | 5 |
| Headlamp at least one does not illuminate on main beam |1.2.2a|ii|| | 5 |
| Rear wheel bearings are excessively rough |2.4.A.2c| | 5 |
| Rear Drive chain excessively loose |6.2.1d| | 5 |
| Nearside Front Shock absorber has a serious fluid leak |5.3.2 |b|| | 5 |
| Offside Front Shock absorber has a serious fluid leak |5.3.2 |b|| | 5 |
| Nearside Front Shock absorber has a serious fluid leak (5.3.2 (b)) | 5 |
| Front Position lamp not working (4.2.1 (a)) | 5 |
| Front Wheel bearing so rough it is likely to overheat or break up (5.1.3 (b) (ii)) | 5 |
| Roller brake test The less effective brake control does not achieve an efficiency of 25% (1.2.2 (a) (i)) | 5 |
| Front Brake fluid reservoir fluid level dangerously low |3.2.B1d| | 4 |
| Front Floor brake test indicates a sticking brake |3.3.C2c| | 4 |
| Handlebar deformed |2.1.1b| | 4 |
| Brake pedal has inadequate reserve travel |3.1.3b| | 4 |
| Brake lever has inadequate reserve travel |3.1.3b| | 4 |
| Offside Handlebar handgrip not secure to handlebars. |2.1.1c| | 4 |
| Rear Shock absorber has negligible damping effect |5.3.2 |b|| | 4 |
| Rear Roller brake test indicates a sticking brake |3.3.A1a| | 4 |
| Front shock absorber seal failed and leaking oil |2.3.3| | 4 |
| Rear Shock absorber has negligible damping effect (5.3.2 (b)) | 4 |
| Rear Brake excessively binding (1.2.1 (f)) | 4 |
| Rear Rear reflector missing (4.8.2 (a) (ii)) | 4 |
| Rear Floor brake test indicates a sticking brake |3.3.C2c| | 3 |
| Handlebar mounting clamp bolt loose |2.1.1a| | 3 |
| Horn not loud enough to be heard by another road user |1.7.3a| | 3 |
| Offside Front Footrest insecure |6.2.1a| | 3 |
| Nearside Rear Footrest missing |6.2.1a| | 3 |
| Steering headbearing has excessive free play |2.2.2| | 3 |
| Front Front wheel bearings are excessively rough |2.3.5b| | 3 |
| Rear suspension movement is excessively stiff |2.4.A.3b| | 3 |
| Front Headlamp at least one does not illuminate on dipped beam |1.2.2a|i|| | 3 |
| Rear Roller brake test indicates brake effort rise disproportional to brake lever or pedal effort |3.3.A1c| | 3 |
| Front Wheel bearing has excessive play |5.1.3 |a| |i|| | 3 |
| Headlamp insecure |1.2.3b| | 3 |
| Front Exhaust is leaking and excessively noisey |7.1.1b| | 3 |
| Rear Drive chain sprocket worn to excess |6.2.1e| | 3 |
| Rear Roller brake test indicates brake effort fall disproportional to brake lever or pedal effort |3.3.A1c| | 3 |
| Front Stop lamp remains on when the brake is released |1.3.1e| | 3 |
| Nearside Front Front shock absorber seal failed and leaking oil |2.3.3| | 3 |
| Nearside Front Roller brake test indicates a binding brake |3.3.A1a| | 3 |
| Offside Front Roller brake test indicates a binding brake |3.3.A1a| | 3 |
| Locking device|s| not correctly fitted which may make the motor bicycle dangerous to ride |6.2.1h| | 3 |
| Rear Brake excessively binding |1.2.1 |f|| | 3 |
| Steering movement excessively `notchy` with the wheel raised |2.2.1b| | 3 |
| Rear Floor brake test indicates a binding brake |3.3.C2c| | 3 |
| Offside Rear Footrest missing |6.2.1a| | 3 |
| Front Hydraulic brake control feels spongy |3.1.4a| | 3 |
| Front Brake component has restricted free movement and operation is likely to be impeded |3.2.A1h| | 3 |
| Roller brake test No brake control achieves an efficiency of 30%. |3.3.A2a| | 3 |
| Front Stop lamp not working (4.3.1 (a) (ii)) | 3 |
| Rear Position lamp not working (4.2.1 (a)) | 3 |
| Rear Brake disc significantly and obviously worn (1.1.14 (a) (i)) | 3 |
| Front Wheel bearing has excessive play (5.1.3 (a) (i)) | 3 |
| Rear Valve stem seriously damaged (5.2.3 (j)) | 3 |
| Front Valve stem seriously damaged (5.2.3 (j)) | 3 |
| Rear Wheel bearing has excessive play (5.1.3 (a) (i)) | 3 |
| Drive chain excessively loose (6.1.7 (c) (i)) | 3 |