| Most common failures | No# failures |
|---|
| Headlamp aim out of alignment | 112 |
| Registration plate issues | 82 |
| Rear reflector on motorcycle missing |1.4.1| | 52 |
| Front Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 17 |
| Rear Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 12 |
| Nearside Front shock absorber seal failed and leaking oil |2.3.3| | 11 |
| Headlamp at least one does not illuminate on dipped beam |1.2.2a|i|| | 11 |
| Front wheel bearings are excessively rough |2.3.5b| | 10 |
| Front Roller brake test indicates excessive fluctuation of brake effort |3.3.A1d| | 9 |
| Drive chain excessively loose |6.2.1d| | 9 |
| Drive chain excessively tight |6.2.1d| | 9 |
| Registration plate lamp issues | 9 |
| Front wheel bearings have excessive free play |2.3.5b| | 9 |
| Rear Rear reflector on motorcycle missing |1.4.1| | 7 |
| Front Brake indicates excessive fluctuation of brake effort (1.2.1 (e)) | 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 |
| Offside Front shock absorber seal failed and leaking oil |2.3.3| | 7 |
| Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 6 |
| Nearside Handlebar handgrip not secure to handlebars. |2.1.1c| | 6 |
| Horn not working |1.7.3a| | 6 |
| Stop lamp remains on when the brakes are released | 6 |
| Headlamp not working on dipped beam (4.1.1 (a) (ii)) | 5 |
| Stop lamp not working (4.3.1 (a) (ii)) | 5 |
| Rear reflector missing (4.8.2 (a) (ii)) | 5 |
| Wheel alignment incorrect which adversely affects the handling |2.5.1| | 5 |
| Front Roller brake test indicates a binding brake |3.3.A1a| | 5 |
| Nearside Rear Direction indicators not working |1.5.1c| | 5 |
| Nearside Front Shock absorber has a serious fluid leak (5.3.2 (b)) | 4 |
| Rear position lamp adversely affected by the operation of another lamp |1.1.3b| | 4 |
| Horn not working (7.7 (a) (ii)) | 4 |
| 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)) | 4 |
| Throttle has a significant change in engine speed whilst moving the steering from lock to lock |2.1.4| | 4 |
| Offside Rear Direction indicators not working |1.5.1c| | 4 |
| Nearside Front Direction indicators not working |1.5.1c| | 4 |
| Front Shock absorber has a serious fluid leak (5.3.2 (b)) | 4 |
| Rear Stop lamp not working (4.3.1 (a) (ii)) | 4 |
| Headlamp aim beam image kick up to the offside |1.6| | 4 |
| Front Front position lamp incorrect colour |1.1.2a| | 4 |
| Front Front position lamp does not illuminate immediately when switched on |1.1.3a| | 3 |
| Front Front shock absorber seal failed and leaking oil |2.3.3| | 3 |
| Rear Direction indicator affected by the operation of another lamp |1.5.1c| | 3 |
| Front Wheel bearing rough when rotated (5.1.3 (b) (i)) | 3 |
| Front position lamp does not illuminate immediately when switched on |1.1.3a| | 3 |
| Front Wheel bearing so rough it is likely to overheat or break up (5.1.3 (b) (ii)) | 3 |
| Offside Rear Direction indicator not working (4.4.1 (a) (ii)) | 3 |
| Nearside Front Shock absorber has a serious fluid leak |5.3.2 |b|| | 3 |
| Front Stop lamp not working (4.3.1 (a) (ii)) | 3 |
| Stop lamp not working |4.3.1 |a| |ii|| | 3 |
| Front Front wheel bearings have excessive free play |2.3.5b| | 3 |
| Front Front wheel bearings are excessively rough |2.3.5b| | 3 |
| Rear Wheel alignment incorrect which adversely affects the handling |2.5.1| | 3 |
| Nearside Rear Direction indicator not working |1.5.1c| | 3 |
| Nearside Front Front shock absorber seal failed and leaking oil |2.3.3| | 3 |
| Stop lamp affected by the operation of another lamp |1.3.2| | 2 |
| Front Stop lamp not working |4.3.1 |a| |ii|| | 2 |
| Rear Brake pedal cannot be applied smoothly |3.1.3d| | 2 |
| Horn not working (7.7 (a)) | 2 |
| Exhaust markings indicating not for road use or similar wording |7.1.4| | 2 |
| Front Brake excessively binding (1.2.1 (f)) | 2 |
| Front Stop lamp missing (4.3.1 (a) (ii)) | 2 |
| Steering headbearing has excessive free play |2.2.2| | 2 |
| Front Valve stem seriously damaged (5.2.3 (j)) | 2 |
| Rear Valve stem seriously damaged (5.2.3 (j)) | 2 |
| Offside Front Brake disc|s| friction surface contaminated by oil or grease |3.2.A1k| | 2 |
| Steering headbearing has excessive wear or free play |2.2.2 |f| |i|| | 2 |
| Front Wheel bearing has excessive play (5.1.3 (a) (i)) | 2 |
| Offside Front Direction indicator likely to become detached (4.4.1 (c) (ii)) | 2 |
| Centre Rear Upper Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 2 |
| Front Floor brake test indicates a binding brake |3.3.C2c| | 2 |
| Rear reflector missing |4.8.2 |a| |ii|| | 2 |
| Rear Wheel bearing has excessive play (5.1.3 (a) (i)) | 2 |
| Nearside Rear Direction indicator not working |4.4.1 |a| |ii|| | 2 |
| Rear Brake pedal has insufficient reserve travel (1.1.2 (a)) | 2 |
| Steering movement excessively stiff with the wheel raised |2.2.1b| | 2 |
| Drive chain worn to excess |6.2.1e| | 2 |
| Horn not loud enough to be heard by another road user |1.7.3a| | 2 |
| Rear Stop lamp not working |4.3.1 |a| |ii|| | 2 |
| Wheel alignment incorrect which adversely affects the steering |2.5.1| | 2 |
| Offside Rear Direction indicator not working |1.5.1c| | 2 |
| Front shock absorber seal failed and leaking oil |2.3.3| | 2 |