| Most common failures | No# failures |
|---|
| Rear reflector on motorcycle missing |1.4.1| | 175 |
| Registration plate issues | 157 |
| Headlamp aim out of alignment | 116 |
| Rear Rear reflector on motorcycle missing |1.4.1| | 47 |
| Rear Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 31 |
| Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 24 |
| Front Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 22 |
| Steering headbearing has excessive free play |2.2.2| | 20 |
| 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| | 20 |
| Direction indicators flashing more than 120 times per minute |1.5.1c| | 14 |
| Front Roller brake test indicates a binding brake |3.3.A1a| | 13 |
| Exhaust markings indicating not for road use or similar wording |7.1.4| | 13 |
| Rear position lamp does not illuminate immediately when it is switched on |1.1.3a| | 12 |
| Rear wheel bearings have excessive free play |2.4.A.2c| | 12 |
| Horn not working |1.7.3a| | 12 |
| Headlamp aim beam image kick up to the offside |1.6| | 12 |
| Rear reflector missing (4.8.2 (a) (ii)) | 12 |
| Drive chain excessively loose |6.2.1d| | 10 |
| Rear reflector on motorcycle incorrectly positioned |1.4.2d| | 9 |
| Headlamp at least one does not illuminate on dipped beam |1.2.2a|i|| | 9 |
| Front Roller brake test indicates excessive fluctuation of brake effort |3.3.A1d| | 9 |
| Riders seat insecure |6.2.1a| | 8 |
| Drive chain excessively tight |6.2.1d| | 7 |
| Offside Rear Footrest missing |6.2.1a| | 7 |
| Offside Rear Direction indicator not working |1.5.1c| | 7 |
| Nearside Rear Direction indicator not working |1.5.1c| | 7 |
| Front position lamp does not illuminate immediately when switched on |1.1.3a| | 7 |
| Front position lamp incorrect colour |1.1.2a| | 7 |
| Registration plate lamp issues | 7 |
| Rear Footrest missing |6.2.1a| | 6 |
| Front Steering headbearing has excessive free play |2.2.2| | 6 |
| Offside Rear Direction indicators not working |1.5.1c| | 6 |
| Nearside Handlebar handgrip not secure to handlebars. |2.1.1c| | 6 |
| Nearside Rear Footrest missing |6.2.1a| | 6 |
| Front Direction indicator incorrect colour |1.5.1b| | 6 |
| Rear reflector missing |4.8.2 |a| |ii|| | 6 |
| Drive chain worn to excess |6.2.1e| | 6 |
| Offside Front shock absorber seal failed and leaking oil |2.3.3| | 6 |
| Offside Front Footrest insecure |6.2.1a| | 6 |
| Rear suspension bearing has excessive free play |2.4.A2a|i|| | 6 |
| Rear Roller brake test indicates excessive fluctuation of brake effort |3.3.A1d| | 6 |
| Rear Drive chain sprocket worn to excess |6.2.1e| | 5 |
| Nearside Direction indicator flashing more than 120 times per minute |1.5.1c| | 5 |
| Front Floor brake test indicates a binding brake |3.3.C2c| | 5 |
| Offside Front Direction indicators not working |1.5.1c| | 5 |
| Direction indicator flashing more than 120 times per minute |1.5.1c| | 5 |
| Roller brake test The less effective brake control does not achieve an efficiency of 25%. |3.3.A2b| | 4 |
| Offside Front position lamp does not illuminate immediately when switched on |1.1.3a| | 4 |
| Rear suspension bush has excessive free play |2.4.A2a|i|| | 4 |
| Rear Brake disc|s| cracked |3.2.A1g| | 4 |
| Headlamp at least one does not illuminate on main beam |1.2.2a|ii|| | 4 |
| Nearside Front Direction indicator not working |1.5.1c| | 4 |
| Nearside Front shock absorber seal failed and leaking oil |2.3.3| | 4 |
| Rear Stop lamp remains on when the brake is released |1.3.1e| | 4 |
| Offside Direction indicator flashing more than 120 times per minute |1.5.1c| | 4 |
| Rear Exhaust markings indicating not for road use or similar wording |7.1.4| | 4 |
| Rear Direction indicator not working |1.5.1c| | 4 |
| Horn not loud enough to be heard by another road user |1.7.3a| | 4 |
| Steering control fouling between components which interferes with the free movement of the steering |2.1.2a| | 4 |
| Offside Rear Direction indicator incorrect colour |1.5.1b| | 4 |
| Rear Rear reflector missing (4.8.2 (a) (ii)) | 4 |
| Front Direction indicators flashing more than 120 times per minute |1.5.1c| | 3 |
| Rear Direction indicators flashing more than 120 times per minute |1.5.1c| | 3 |
| Rear shock absorber has inadequate damping effect. |2.4.A.3b| | 3 |
| Rear Roller brake test indicates a binding brake |3.3.A1a| | 3 |
| Front Brake lever has inadequate reserve travel |3.1.3b| | 3 |
| Headlamp dipped beam affected by the operation of another lamp |1.2.2c| | 3 |
| Wheel alignment incorrect which adversely affects the steering |2.5.1| | 3 |
| Nearside Handlebar mounting clamp bolt loose |2.1.1a| | 3 |
| Rear position lamp adversely affected by the operation of another lamp |1.1.3b| | 3 |
| Stop lamp affected by the operation of another lamp |1.3.2| | 3 |
| Front Direction indicator flashing more than 120 times per minute |1.5.1c| | 3 |
| Offside Front Direction indicator not working |1.5.1c| | 3 |
| Offside Footrest insecure |6.2.1a| | 3 |
| Headlamp incorrect colour |1.2.1| | 3 |
| Nearside Rear Direction indicators not working |1.5.1c| | 3 |
| Centre Rear Rear reflector on motorcycle missing |1.4.1| | 3 |
| Rear Direction indicators not working |1.5.1c| | 3 |
| Nearside Front Direction indicators not working |1.5.1c| | 3 |
| Direction indicator incorrect colour |1.5.1b| | 3 |
| Rear 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| | 3 |
| Steering headbearing has excessive wear or free play (2.2.2 (f) (i)) | 3 |
| Front Stop lamp not working (4.3.1 (a) (ii)) | 3 |
| Front Valve stem seriously damaged (5.2.3 (j)) | 3 |