| Most common failures | No# failures |
|---|
| Rear reflector missing (4.8.2 (a) (ii)) | 64 |
| Registration plate issues | 53 |
| Rear reflector missing |4.8.2 |a| |ii|| | 35 |
| Registration plate lamp issues | 34 |
| Headlamp aim out of alignment | 30 |
| Horn not working (7.7 (a)) | 17 |
| 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)) | 11 |
| Rear reflector on motorcycle missing |1.4.1| | 8 |
| Horn not working (7.7 (a) (ii)) | 8 |
| Rear Rear reflector missing (4.8.2 (a) (ii)) | 8 |
| Drive chain excessively loose (6.1.7 (c) (i)) | 8 |
| Front Stop lamp not working (4.3.1 (a) (ii)) | 8 |
| Nearside Rear Direction indicator not working (4.4.1 (a) (ii)) | 8 |
| Front Brake excessively binding (1.2.1 (f)) | 7 |
| Horn not working |7.7 |a| |ii|| | 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 |
| Offside Rear Direction indicator not working (4.4.1 (a) (ii)) | 6 |
| Rear Rear reflector missing |4.8.2 |a| |ii|| | 5 |
| Offside Front Direction indicator not working (4.4.1 (a) (ii)) | 5 |
| Front Stop lamp not working |4.3.1 |a| |ii|| | 4 |
| Rear Rear reflector on motorcycle missing |1.4.1| | 4 |
| Drive chain worn to excess (6.1.7 (c) (i)) | 4 |
| Stop lamp remains on when the brakes are released | 4 |
| Drive chain horseshoe locking device incorrectly fitted (6.1.7 (j) (i)) | 4 |
| Nearside Front Shock absorber has a serious fluid leak (5.3.2 (b)) | 4 |
| Rear Shock absorber has negligible damping effect (5.3.2 (b)) | 4 |
| Central Rear Rear reflector missing (4.8.2 (a) (ii)) | 4 |
| Nearside Rear Direction indicator not working |4.4.1 |a| |ii|| | 3 |
| Stop lamp not working (4.3.1 (a) (ii)) | 3 |
| Rear Direction indicator obviously incorrectly positioned (4.4.3 (a)) | 3 |
| Offside Front Shock absorber has a serious fluid leak (5.3.2 (b)) | 3 |
| Rear Valve stem seriously damaged (5.2.3 (j)) | 3 |
| Drive chain excessively tight (6.1.7 (k) (i)) | 3 |
| Front Stop lamp does not illuminate by the operation of both brake controls (4.3.2 (a) (iii)) | 3 |
| Front Brake indicates excessive fluctuation of brake effort |1.2.1 |e|| | 2 |
| Nearside Front Direction indicator not working |4.4.1 |a| |ii|| | 2 |
| Horn sound not in accordance with requirements |7.7 |c|| | 2 |
| Offside Rear Direction indicator not working |4.4.1 |a| |ii|| | 2 |
| Rear Position lamp not working (4.2.1 (a)) | 2 |
| Throttle operating incorrectly (6.2.7 (a) (i)) | 2 |
| Rear Drive chain excessively loose (6.1.7 (c) (i)) | 2 |
| Front Stop lamp switch with a delay in operation (4.3.2 (a) (ii)) | 2 |
| Drive chain so loose it is likely to fail (6.1.7 (c) (ii)) | 2 |
| Front Valve stem seriously damaged (5.2.3 (j)) | 2 |
| Drive chain sprocket worn to excess (6.1.7 (c) (i)) | 2 |
| Nearside Rear Direction indicator obviously incorrectly positioned (4.4.3 (a)) | 2 |
| Offside Rear Direction indicator obviously incorrectly positioned (4.4.3 (a)) | 2 |
| Front Position lamp not working (4.2.1 (a)) | 2 |
| Front Brake indicates excessive fluctuation of brake effort (1.2.1 (e)) | 2 |
| Rear Stop lamp not working (4.3.1 (a) (ii)) | 2 |
| Rear Brake pedal pivot excessively tight (1.1.1 (a)) | 2 |
| Riders seat insecure (6.2.5 (a) (ii)) | 2 |
| Front Wheel excessively distorted (5.2.2 (c) (i)) | 2 |
| Headlamp aim projected beam image obviously incorrect (4.1.2 (c)) | 2 |
| Nearside Front Direction indicator not working (4.4.1 (a) (ii)) | 2 |
| Rear All direction indicators obviously incorrectly positioned (4.4.3 (a)) | 2 |
| Stop lamp adversely affected by the operation of another lamp (4.3.3 (b)) | 2 |