| Most common failures | No# failures |
|---|
| Rear reflector on motorcycle missing |1.4.1| | 153 |
| Registration plate issues | 148 |
| Headlamp aim out of alignment | 110 |
| Rear reflector missing (4.8.2 (a) (ii)) | 37 |
| Registration plate lamp issues | 37 |
| Rear reflector missing |4.8.2 |a| |ii|| | 15 |
| Front Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 13 |
| Rear Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 12 |
| Headlamp at least one does not illuminate on main beam |1.2.2a|ii|| | 12 |
| 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| | 11 |
| Headlamp at least one does not illuminate on dipped beam |1.2.2a|i|| | 9 |
| Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 9 |
| Front position lamp does not illuminate immediately when switched on |1.1.3a| | 8 |
| Nearside Front shock absorber seal failed and leaking oil |2.3.3| | 7 |
| Front Roller brake test indicates excessive fluctuation of brake effort |3.3.A1d| | 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)) | 6 |
| Rear Rear reflector missing (4.8.2 (a) (ii)) | 5 |
| Front wheel bearings have excessive free play |2.3.5b| | 5 |
| Drive chain excessively loose |6.2.1d| | 5 |
| Rear reflector on motorcycle incorrectly positioned |1.4.2d| | 5 |
| 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 |
| Drive chain excessively tight |6.2.1d| | 4 |
| Rear Stop lamp not working (4.3.1 (a) (ii)) | 4 |
| Front Roller brake test indicates a binding brake |3.3.A1a| | 4 |
| Horn not working (7.7 (a) (ii)) | 4 |
| Rear Rear reflector on motorcycle missing |1.4.1| | 4 |
| Stop lamp remains on when the brakes are released | 3 |
| Nearside Front Direction indicators not working |1.5.1c| | 3 |
| Front Stop lamp not working |4.3.1 |a| |ii|| | 3 |
| Drive chain excessively loose |6.1.7 |c| |i|| | 3 |
| Headlamp not working on main beam (4.1.1 (a) (ii)) | 3 |
| Front wheel bearings are excessively rough |2.3.5b| | 3 |
| Nearside Front Direction indicator not working (4.4.1 (a) (ii)) | 3 |
| Horn not working |1.7.3a| | 3 |
| Front Brake indicates excessive fluctuation of brake effort (1.2.1 (e)) | 3 |
| Front Position lamp not working |4.2.1 |a|| | 3 |
| Steering movement excessively `notchy` with the wheel raised |2.2.1b| | 3 |
| Front Wheel bearing so rough it is likely to overheat or break up |5.1.3 |b| |ii|| | 2 |
| Rear Brake excessively binding (1.2.1 (f)) | 2 |
| Offside Rear Direction indicator not working (4.4.1 (a) (ii)) | 2 |
| Front Brake disc|s| has excessive run out |3.2.A1m| | 2 |
| Nearside Handlebar grip insecure to handlebar (2.2.1 (d) (ii)) | 2 |
| Centre Rear Rear reflector on motorcycle missing |1.4.1| | 2 |
| Front Stop lamp does not emit a steady light |1.3.1b| | 2 |
| Front Valve stem seriously damaged |5.2.3 |j|| | 2 |
| Rear Brake indicates excessive fluctuation of brake effort |1.2.1 |e|| | 2 |
| Exhaust has part of the system missing |7.1.1a| | 2 |
| Horn not loud enough to be heard by another road user |1.7.3a| | 2 |
| Front Shock absorber has a serious fluid leak |5.3.2 |b|| | 2 |
| Rear Wheel has an excessively distorted bead rim. |4.2.2| | 2 |
| Rear Roller brake test indicates excessive fluctuation of brake effort |3.3.A1d| | 2 |
| Rear position lamp incorrect colour |1.1.2b| | 2 |
| Drive chain worn to excess |6.2.1e| | 2 |
| Rear Rear reflector missing |4.8.2 |a| |ii|| | 2 |
| Front Wheel has an excessively distorted bead rim. |4.2.2| | 2 |
| Nearside Rear Direction indicator not working |1.5.1c| | 2 |
| Front Wheel bearing has excessive play (5.1.3 (a) (i)) | 2 |
| Nearside Rear 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| | 2 |
| Offside Rear 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| | 2 |
| Front Position lamp not working (4.2.1 (a)) | 2 |
| Rear wheel bearings have excessive free play |2.4.A.2c| | 2 |
| Rear position lamp does not illuminate immediately when it is switched on |1.1.3a| | 2 |
| Nearside Front Shock absorber has a serious fluid leak (5.3.2 (b)) | 2 |
| Rear Suspension component pin or bush excessively worn (5.3.4 (a) (i)) | 2 |
| Central Rear Rear reflector on motorcycle missing |1.4.1| | 2 |
| Offside Front Shock absorber has a serious fluid leak (5.3.2 (b)) | 2 |
| Horn not working (7.7 (a)) | 2 |
| Front Stop lamp not working (4.3.1 (a) (ii)) | 2 |