| Most common failures | No# failures |
|---|
| Headlamp aim out of alignment | 132 |
| Rear reflector on motorcycle missing |1.4.1| | 118 |
| Registration plate issues | 105 |
| Registration plate lamp issues | 29 |
| Rear reflector missing (4.8.2 (a) (ii)) | 26 |
| Rear reflector missing |4.8.2 |a| |ii|| | 18 |
| Drive chain excessively loose |6.2.1d| | 17 |
| Rear Rear reflector on motorcycle missing |1.4.1| | 17 |
| Horn not working |1.7.3a| | 15 |
| Rear Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 13 |
| Front Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 12 |
| Headlamp at least one does not illuminate on dipped beam |1.2.2a|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 |
| Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 8 |
| Front Stop lamp not working (4.3.1 (a) (ii)) | 8 |
| Nearside Front Footrest insecure |6.2.1a| | 7 |
| Front position lamp incorrect colour |1.1.2a| | 6 |
| Nearside Rear Direction indicators not working |1.5.1c| | 6 |
| Stop lamp remains on when the brakes are released | 6 |
| Drive chain excessively loose (6.1.7 (c) (i)) | 6 |
| Rear wheel spindle securing nut locking device missing |2.4.A.2b| | 5 |
| Headlamp at least one does not illuminate on main beam |1.2.2a|ii|| | 5 |
| Drive chain excessively loose |6.1.7 |c| |i|| | 5 |
| Steering headbearing excessively stiff or notchy (2.2.2 (f) (i)) | 5 |
| Rear Rear reflector missing (4.8.2 (a) (ii)) | 5 |
| Front Brake indicates excessive fluctuation of brake effort (1.2.1 (e)) | 5 |
| Front Stop lamp not working |4.3.1 |a| |ii|| | 4 |
| Rear reflector on motorcycle incorrectly positioned |1.4.2d| | 4 |
| Rear position lamp adversely affected by the operation of another lamp |1.1.3b| | 4 |
| Horn not working |7.7 |a| |ii|| | 4 |
| Nearside Rear Direction indicator not working |1.5.1c| | 4 |
| Steering movement excessively `notchy` with the wheel raised |2.2.1b| | 4 |
| Headlamp not working on dipped beam (4.1.1 (a) (ii)) | 4 |
| Rear Stop lamp not working |4.3.1 |a| |ii|| | 3 |
| Front Roller brake test indicates a binding brake |3.3.A1a| | 3 |
| Rear Direction indicator affected by the operation of another lamp |1.5.1c| | 3 |
| Drive chain excessively tight |6.2.1d| | 3 |
| Offside Front Footrest insecure |6.2.1a| | 3 |
| Nearside Front shock absorber seal failed and leaking oil |2.3.3| | 3 |
| Steering headbearing has excessive free play |2.2.2| | 3 |
| Offside Rear Direction indicator not working |1.5.1c| | 3 |
| Offside Front Direction indicators not working |1.5.1c| | 3 |
| Nearside Front Shock absorber has a serious fluid leak (5.3.2 (b)) | 3 |
| Drive chain excessively tight (6.1.7 (k) (i)) | 3 |
| Horn not working (7.7 (a) (ii)) | 3 |
| Nearside Rear Direction indicator not working (4.4.1 (a) (ii)) | 3 |
| Front Shock absorber has a serious fluid leak (5.3.2 (b)) | 3 |
| Front Brake excessively binding (1.2.1 (f)) | 3 |
| Horn not working (7.7 (a)) | 3 |
| Steering headbearing in such a condition that steering control is adversely affected |2.2.2 |f| |ii|| | 2 |
| Steering movement excessively `notchy` with the weight on the lower bearing |2.2.1a| | 2 |
| Rear Rear reflector missing |4.8.2 |a| |ii|| | 2 |
| Front Stop lamp does not emit a steady light |1.3.1b| | 2 |
| Rear mono-shock insecure |2.4.B.4| | 2 |
| Front Roller brake test indicates excessive fluctuation of brake effort |3.3.A1d| | 2 |
| Front Brake lever cannot be applied smoothly |3.1.3d| | 2 |
| Front Position lamp not working |4.2.1 |a|| | 2 |
| Steering headbearing excessively stiff or notchy |2.2.2 |f| |i|| | 2 |
| Front position lamp does not illuminate immediately when switched on |1.1.3a| | 2 |
| Rear position lamp does not illuminate immediately when it is switched on |1.1.3a| | 2 |
| Direction indicators not working |1.5.1c| | 2 |
| 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|| | 2 |
| Offside Footrest insecure |6.2.1a| | 2 |
| Drive chain so worn it is likely to fail |6.1.7 |c| |ii|| | 2 |
| Offside Front shock absorber seal failed and leaking oil |2.3.3| | 2 |
| Throttle operating incorrectly |6.2.1f| | 2 |
| Nearside Handlebar handgrip not secure to handlebars. |2.1.1c| | 2 |
| Horn control not functioning. |1.7.2b| | 2 |
| Horn sounds harsh or grating |1.7.3c| | 2 |
| Horn not loud enough to be heard by another road user |1.7.3a| | 2 |
| Drive chain worn to excess |6.2.1e| | 2 |
| Front wheel bearings have excessive free play |2.3.5b| | 2 |
| Offside Front Direction indicator not working |1.5.1c| | 2 |
| Direction indicators flashing more than 120 times per minute |1.5.1c| | 2 |
| Front wheel bearings are excessively rough |2.3.5b| | 2 |
| Rear Valve stem seriously damaged |5.2.3 |j|| | 2 |
| Offside Front Footrest insecure (6.2.12 (a)) | 2 |
| Rear Stop lamp not working (4.3.1 (a) (ii)) | 2 |
| Rear Valve stem seriously damaged (5.2.3 (j)) | 2 |
| 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)) | 2 |
| Offside Rear Direction indicator not working (4.4.1 (a) (ii)) | 2 |
| Rear Direction indicator obviously incorrectly positioned (4.4.3 (a)) | 2 |
| Headlamp aim not tested (4.1.2 (b)) | 2 |