| Most common failures | No# failures |
|---|
| Rear reflector on motorcycle missing |1.4.1| | 89 |
| Registration plate issues | 82 |
| Headlamp aim out of alignment | 75 |
| Registration plate lamp issues | 22 |
| Drive chain excessively loose |6.2.1d| | 16 |
| Rear reflector missing (4.8.2 (a) (ii)) | 13 |
| 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| | 13 |
| Rear Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 10 |
| Rear Rear reflector on motorcycle missing |1.4.1| | 10 |
| Nearside Front shock absorber seal failed and leaking oil |2.3.3| | 9 |
| Rear reflector missing |4.8.2 |a| |ii|| | 9 |
| Headlamp aim beam image kick up to the offside |1.6| | 9 |
| Offside Rear Direction indicator not working |1.5.1c| | 7 |
| Rear position lamp adversely affected by the operation of another lamp |1.1.3b| | 7 |
| Front Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 6 |
| Nearside Rear Direction indicator not working |1.5.1c| | 6 |
| Horn not working |1.7.3a| | 6 |
| Exhaust noise is clearly in excess of that emitted by a similar motorcycle fitted with a standard silencer in average condition (8.1.1 (a)) | 5 |
| Drive chain excessively loose (6.1.7 (c) (i)) | 5 |
| Offside Front Shock absorber has a serious fluid leak (5.3.2 (b)) | 5 |
| Headlamp at least one does not illuminate on dipped beam |1.2.2a|i|| | 5 |
| Front Roller brake test indicates a binding brake |3.3.A1a| | 5 |
| Rear suspension bush has excessive free play |2.4.A2a|i|| | 4 |
| Nearside Rear Direction indicator not working (4.4.1 (a) (ii)) | 4 |
| Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 4 |
| Rear reflector on motorcycle incorrectly positioned |1.4.2d| | 4 |
| Rear Brake excessively binding (1.2.1 (f)) | 3 |
| Riders seat insecure |6.2.1a| | 3 |
| Rear Direction indicator obviously incorrectly positioned (4.4.3 (a)) | 3 |
| Offside Front Shock absorber has a serious fluid leak |5.3.2 |b|| | 3 |
| Front position lamp incorrect colour |1.1.2a| | 3 |
| Rear Stop lamp not working (4.3.1 (a) (ii)) | 3 |
| Offside Front Direction indicator not working |1.5.1c| | 3 |
| Rear Footrest missing |6.2.1a| | 3 |
| Nearside Front Direction indicators not working |1.5.1c| | 3 |
| Nearside Front Direction indicator not working |1.5.1c| | 3 |
| Nearside Front Front shock absorber seal failed and leaking oil |2.3.3| | 3 |
| Offside Front shock absorber seal failed and leaking oil |2.3.3| | 3 |
| Rear position lamp does not illuminate immediately when it is switched on |1.1.3a| | 3 |
| All direction indicators not working (4.4.1 (a) (ii)) | 3 |
| Headlamp at least one does not illuminate on main beam |1.2.2a|ii|| | 3 |
| Stop lamp affected by the operation of another lamp |1.3.2| | 3 |
| Drive chain excessively tight |6.2.1d| | 3 |
| Stop lamp remains on when the brakes are released | 3 |
| Steering headbearing has excessive free play |2.2.2| | 2 |
| Drive chain worn to excess |6.2.1e| | 2 |
| Nearside Front Direction indicator obscured |1.5.1a| | 2 |
| Direction indicator flashing more than 120 times per minute |1.5.1c| | 2 |
| Front Brake fluid contaminated (1.8 (a)) | 2 |
| Rear Brake fluid contaminated (1.8 (a)) | 2 |
| Rear Direction indicators affected by the operation of another lamp |1.5.1c| | 2 |
| Offside Front Footrest insecure |6.2.1a| | 2 |
| Riders seat insecure (6.2.5 (a) (ii)) | 2 |
| Nearside Rear Direction indicator not working |4.4.1 |a| |ii|| | 2 |
| Rear suspension bearing has excessive free play |2.4.A2a|i|| | 2 |
| Rear Direction indicator affected by the operation of another lamp |1.5.1c| | 2 |
| Front Brake lever cannot be applied smoothly |3.1.3d| | 2 |
| Direction indicators flashing more than 120 times per minute |1.5.1c| | 2 |
| Front Headlamp not working on dipped beam (4.1.1 (a) (ii)) | 2 |
| Nearside Front Shock absorber has a serious fluid leak (5.3.2 (b)) | 2 |
| Drive chain excessively loose |6.1.7 |c| |i|| | 2 |
| Front Headlamp aim beam image kick up to the offside |1.6| | 2 |
| Rear position lamp adversely affected by the operation of another lamp (1.1.3b) | 2 |
| Rear reflector on motorcycle missing (1.4.1) | 2 |
| Rear Valve stem seriously damaged (5.2.3 (j)) | 2 |
| Nearside Front Footrest insecure (6.2.12 (a)) | 2 |
| Rear Locking device|s| not correctly fitted which may make the motor bicycle dangerous to ride |6.2.1h| | 2 |
| Stop lamp adversely affected by the operation of another lamp |4.3.3 |b|| | 2 |
| Roller brake test The less effective brake control does not achieve an efficiency of 25% (1.2.2 (a) (i)) | 2 |
| Offside Rear Direction indicators not working |1.5.1c| | 2 |
| Wheel alignment incorrect which adversely affects the handling |2.5.1| | 2 |
| Direction indicators not working |1.5.1c| | 2 |
| Rear Exhaust system insecure (6.1.2 (a)) | 2 |
| Rear Rear reflector missing (4.8.2 (a) (ii)) | 2 |
| Rear Brake disc|s| friction surface contaminated by oil or grease |3.2.A1k| | 2 |
| Front Brake excessively binding (1.2.1 (f)) | 2 |
| Rear Drive chain sprocket worn to excess |6.2.1e| | 2 |
| Front Headlamp incorrect colour |1.2.1| | 2 |
| Rear Brake fluid contaminated |1.8 |a|| | 2 |