| Most common failures | No# failures |
|---|
| Headlamp aim out of alignment | 160 |
| Rear reflector on motorcycle missing |1.4.1| | 156 |
| Registration plate issues | 130 |
| Horn not working |1.7.3a| | 57 |
| Registration plate lamp issues | 54 |
| Front Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 38 |
| Headlamp at least one does not illuminate on dipped beam |1.2.2a|i|| | 24 |
| Drive chain excessively loose |6.2.1d| | 24 |
| Rear reflector missing (4.8.2 (a) (ii)) | 20 |
| Horn not working (7.7 (a) (ii)) | 19 |
| Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 18 |
| Rear Rear reflector on motorcycle missing |1.4.1| | 18 |
| Front position lamp does not illuminate immediately when switched on |1.1.3a| | 18 |
| Rear wheel bearings have excessive free play |2.4.A.2c| | 14 |
| Rear Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 13 |
| Rear position lamp does not illuminate immediately when it is switched on |1.1.3a| | 12 |
| Front Roller brake test indicates excessive fluctuation of brake effort |3.3.A1d| | 10 |
| Throttle operating incorrectly |6.2.1f| | 10 |
| Horn not working |7.7 |a| |ii|| | 10 |
| Rear wheel spindle securing nut locking device missing |2.4.A.2b| | 10 |
| Nearside Rear Direction indicators not working |1.5.1c| | 10 |
| Drive chain excessively tight |6.2.1d| | 9 |
| Drive chain excessively loose (6.1.7 (c) (i)) | 9 |
| 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| | 8 |
| Nearside Front Footrest insecure |6.2.1a| | 8 |
| Nearside Rear Direction indicator not working (4.4.1 (a) (ii)) | 8 |
| Nearside Rear Direction indicator not working |1.5.1c| | 7 |
| Offside Rear Direction indicators not working |1.5.1c| | 7 |
| Headlamp at least one does not illuminate on main beam |1.2.2a|ii|| | 7 |
| Front Stop lamp not working |4.3.1 |a| |ii|| | 7 |
| Rear reflector on motorcycle incorrectly positioned |1.4.2d| | 7 |
| Nearside Handlebar handgrip not secure to handlebars. |2.1.1c| | 7 |
| Front Position lamp not working (4.2.1 (a)) | 7 |
| Front Stop lamp not working (4.3.1 (a) (ii)) | 7 |
| Nearside Front Shock absorber has a serious fluid leak (5.3.2 (b)) | 7 |
| Offside Front Shock absorber has a serious fluid leak (5.3.2 (b)) | 7 |
| Horn not working (7.7 (a)) | 7 |
| Offside Front Footrest insecure |6.2.1a| | 6 |
| Front Horn not working |1.7.3a| | 6 |
| Offside Front Direction indicators not working |1.5.1c| | 6 |
| Front wheel bearings are excessively rough |2.3.5b| | 6 |
| Nearside Front Direction indicators not working |1.5.1c| | 6 |
| Rear reflector missing |4.8.2 |a| |ii|| | 6 |
| Front Roller brake test indicates a binding brake |3.3.A1a| | 6 |
| Nearside Front shock absorber seal failed and leaking oil |2.3.3| | 6 |
| Offside Front shock absorber seal failed and leaking oil |2.3.3| | 6 |
| Headlamp not working on dipped beam (4.1.1 (a) (ii)) | 6 |
| Rear Rear reflector missing (4.8.2 (a) (ii)) | 6 |
| Stop lamp remains on when the brake is released |1.3.1e| | 5 |
| Front Headlamp at least one does not illuminate on dipped beam |1.2.2a|i|| | 5 |
| Offside Front Shock absorber has a serious fluid leak |5.3.2 |b|| | 5 |
| Front wheel bearings have excessive free play |2.3.5b| | 5 |
| Nearside Front Direction indicator not working |1.5.1c| | 5 |
| Horn not loud enough to be heard by another road user |1.7.3a| | 5 |
| Rear Stop lamp not working (4.3.1 (a) (ii)) | 5 |
| Offside Front Direction indicator not working (4.4.1 (a) (ii)) | 5 |
| Rear Valve stem seriously damaged (5.2.3 (j)) | 5 |
| Nearside Handlebar grip insecure to handlebar (2.2.1 (d) (ii)) | 5 |
| Front Brake lever has inadequate reserve travel |3.1.3b| | 4 |
| Front Floor brake test indicates a binding brake |3.3.C2c| | 4 |
| Steering movement excessively `notchy` with the wheel raised |2.2.1b| | 4 |
| Rear Rear reflector missing |4.8.2 |a| |ii|| | 4 |
| Direction indicators flashing more than 120 times per minute |1.5.1c| | 4 |
| Rear Direction indicator affected by the operation of another lamp |1.5.1c| | 4 |
| Steering movement excessively `notchy` with the weight on the lower bearing |2.2.1a| | 4 |
| Front shock absorber seal failed and leaking oil |2.3.3| | 4 |
| Headlamp not working on dipped beam |4.1.1 |a| |ii|| | 4 |
| Rear Roller brake test indicates a binding brake |3.3.A1a| | 4 |
| Steering control has Insufficient clearance at full lock affecting the riders grasp of handlebars |2.1.2b| | 4 |
| Front Front position lamp does not illuminate immediately when switched on |1.1.3a| | 4 |
| Offside Rear Direction indicator not working (4.4.1 (a) (ii)) | 4 |
| Throttle operating incorrectly (6.2.7 (a) (i)) | 4 |
| Front Horn not working (7.7 (a) (ii)) | 4 |
| Front Valve stem seriously damaged (5.2.3 (j)) | 4 |
| Front Brake indicates excessive fluctuation of brake effort (1.2.1 (e)) | 4 |