| Most common failures | No# failures |
|---|
| Headlamp aim out of alignment | 73 |
| Registration plate issues | 62 |
| Rear reflector on motorcycle missing |1.4.1| | 24 |
| Front wheel bearings have excessive free play |2.3.5b| | 16 |
| Front Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 16 |
| Front wheel bearings are excessively rough |2.3.5b| | 14 |
| Rear Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 14 |
| Headlamp at least one does not illuminate on dipped beam |1.2.2a|i|| | 14 |
| Horn not working |1.7.3a| | 13 |
| Front Roller brake test indicates excessive fluctuation of brake effort |3.3.A1d| | 12 |
| Drive chain excessively loose |6.2.1d| | 10 |
| Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 9 |
| Front Front wheel bearings have excessive free play |2.3.5b| | 9 |
| Nearside Handlebar handgrip not secure to handlebars. |2.1.1c| | 7 |
| Registration plate lamp issues | 7 |
| 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| | 7 |
| Horn not working (7.7 (a)) | 7 |
| Nearside Front Front shock absorber seal failed and leaking oil |2.3.3| | 7 |
| Throttle has a significant change in engine speed whilst moving the steering from lock to lock |2.1.4| | 6 |
| Drive chain sprocket carrier worn to excess |6.2.1e| | 6 |
| Riders seat insecure |6.2.1a| | 5 |
| Rear Wheel bearing has excessive play (5.1.3 (a) (i)) | 5 |
| Horn not working (7.7 (a) (ii)) | 5 |
| Nearside Front shock absorber seal failed and leaking oil |2.3.3| | 5 |
| Front Headlamp at least one does not illuminate on dipped beam |1.2.2a|i|| | 5 |
| Offside Front shock absorber seal failed and leaking oil |2.3.3| | 5 |
| Headlamp not working on dipped beam (4.1.1 (a) (ii)) | 4 |
| Rear Rear reflector on motorcycle missing |1.4.1| | 4 |
| Rear wheel bearings have excessive free play |2.4.A.2c| | 4 |
| Drive chain worn to excess |6.2.1e| | 4 |
| Front position lamp does not illuminate immediately when switched on |1.1.3a| | 4 |
| Rear position lamp adversely affected by the operation of another lamp |1.1.3b| | 4 |
| Rear Drive chain sprocket worn to excess |6.2.1e| | 4 |
| Offside Front Front shock absorber seal failed and leaking oil |2.3.3| | 4 |
| Front Stop lamp not working (4.3.1 (a) (ii)) | 4 |
| Rear reflector missing (4.8.2 (a) (ii)) | 4 |
| Front Stop lamp not working |4.3.1 |a| |ii|| | 3 |
| Headlamp at least one does not illuminate on main beam |1.2.2a|ii|| | 3 |
| Rear Roller brake test indicates a binding brake |3.3.A1a| | 3 |
| Front Brake excessively binding (1.2.1 (f)) | 3 |
| Nearside Rear Direction indicator not working |1.5.1c| | 3 |
| Stop lamp affected by the operation of another lamp |1.3.2| | 3 |
| Nearside Front Direction indicator not working |1.5.1c| | 3 |
| Rear Stop lamp not working (4.3.1 (a) (ii)) | 3 |
| Horn not working |7.7 |a| |ii|| | 3 |
| Exhaust markings indicating not for road use or similar wording |7.1.4| | 3 |
| Headlamp not working on dipped beam |4.1.1 |a| |ii|| | 3 |
| Front Brake indicates excessive fluctuation of brake effort (1.2.1 (e)) | 3 |
| Roller brake test The less effective brake control does not achieve an efficiency of 25%. |3.3.A2b| | 3 |
| Nearside Exhaust mounting does not fully support the exhaust system |7.1.1.c| | 3 |
| Front Front wheel bearings are excessively rough |2.3.5b| | 3 |
| Nearside Front Direction indicator not working (4.4.1 (a) (ii)) | 3 |
| Centre Rear reflector on motorcycle missing |1.4.1| | 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 |
| 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 |
| Nearside Exhaust markings indicating not for road use or similar wording |7.1.4| | 2 |
| Offside Exhaust markings indicating not for road use or similar wording |7.1.4| | 2 |
| Front Position lamp not working (4.2.1 (a)) | 2 |
| Offside Rear Direction indicators not working |1.5.1c| | 2 |
| Front Roller brake test indicates a binding brake |3.3.A1a| | 2 |
| Rear position lamp does not illuminate immediately when it is switched on |1.1.3a| | 2 |
| Rear Brake pedal has inadequate reserve travel |3.1.3b| | 2 |
| Headlamp incorrect colour |1.2.1| | 2 |
| Front Roller brake test indicates a severely juddering brake |3.3.A1b| | 2 |
| Headlamp light intensity severely reduced no image on dipped beam (4.1.4 (a)) | 2 |
| Rear Roller brake test indicates excessive fluctuation of brake effort |3.3.A1d| | 2 |
| Front Headlamp at least one does not illuminate on main beam |1.2.2a|ii|| | 2 |
| Stop lamp does not illuminate by the operation of both brake controls (4.3.2 (a) (iii)) | 2 |
| Nearside Rear Direction indicator not working (4.4.1 (a) (ii)) | 2 |
| Front Horn not working |1.7.3a| | 2 |
| Rear Direction indicator obviously incorrectly positioned (4.4.3 (a)) | 2 |
| Nearside Front Shock absorber has a serious fluid leak (5.3.2 (b)) | 2 |
| Steering headbearing has excessive free play |2.2.2| | 2 |
| Drive chain excessively tight |6.2.1d| | 2 |
| Rear Direction indicator adversely affected by the operation of another lamp (4.4.3 (b)) | 2 |
| Direction indicators flashing more than 120 times per minute |1.5.1c| | 2 |
| Front Wheel bearing rough when rotated (5.1.3 (b) (i)) | 2 |