| Most common failures | No# failures |
|---|
| Headlamp aim out of alignment | 99 |
| Registration plate issues | 72 |
| Rear reflector on motorcycle missing |1.4.1| | 35 |
| Exhaust markings indicating not for road use or similar wording |7.1.4| | 21 |
| Registration plate lamp issues | 15 |
| Rear reflector missing (4.8.2 (a) (ii)) | 14 |
| 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| | 13 |
| Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 10 |
| Front Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 9 |
| Rear position lamp does not illuminate immediately when it is switched on |1.1.3a| | 9 |
| Rear Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 9 |
| Horn not working |1.7.3a| | 9 |
| Rear reflector missing |4.8.2 |a| |ii|| | 7 |
| Rear Rear reflector on motorcycle missing |1.4.1| | 7 |
| Nearside Front Shock absorber has a serious fluid leak (5.3.2 (b)) | 5 |
| Front Brake lever has insufficient reserve travel (1.1.2 (a)) | 5 |
| Headlamp aim beam image kick up to the offside |1.6| | 4 |
| Front Hydraulic brake control feels spongy |3.1.4a| | 4 |
| Rear reflector on motorcycle obscured |1.4.1| | 4 |
| Front position lamp does not illuminate immediately when switched on |1.1.3a| | 4 |
| Rear Position lamp not working (4.2.1 (a)) | 4 |
| Front Roller brake test indicates excessive fluctuation of brake effort |3.3.A1d| | 4 |
| Front Brake lever has inadequate reserve travel |3.1.3b| | 4 |
| Front Direction indicator not working |1.5.1c| | 3 |
| Rear Rear position lamp does not illuminate immediately when it is switched on |1.1.3a| | 3 |
| Rear Brake indicates excessive fluctuation of brake effort (1.2.1 (e)) | 3 |
| Rear Stop lamp remains on when the brake is released |1.3.1e| | 3 |
| Offside Rear Direction indicator not working (4.4.1 (a) (ii)) | 3 |
| Stop lamp not working (4.3.1 (a) (ii)) | 3 |
| Rear Roller brake test indicates a binding brake |3.3.A1a| | 3 |
| Front Stop lamp not working (4.3.1 (a) (ii)) | 3 |
| Offside Front shock absorber seal failed and leaking oil |2.3.3| | 3 |
| Rear Position lamp not working |4.2.1 |a|| | 3 |
| Rear Brake disc|s| has excessive run out |3.2.A1m| | 2 |
| Offside Front Brake disc|s| friction surface contaminated by oil or grease |3.2.A1k| | 2 |
| Front brake disc in such a condition that it is seriously weakened | 2 |
| Horn not working (7.7 (a) (ii)) | 2 |
| Front Stop lamp not working |4.3.1 |a| |ii|| | 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 |
| Throttle operating incorrectly |6.2.1f| | 2 |
| Nearside Front Front shock absorber seal failed and leaking oil |2.3.3| | 2 |
| Front Horn not working |1.7.3a| | 2 |
| Front Roller brake test indicates brake effort rise disproportional to brake lever or pedal effort |3.3.A1c| | 2 |
| Nearside Rear Direction indicator not working (4.4.1 (a) (ii)) | 2 |
| Rear Direction indicator not working |1.5.1c| | 2 |
| Front Wheel bearing has excessive play (5.1.3 (a) (i)) | 2 |
| Brake lever has inadequate reserve travel |3.1.3b| | 2 |
| Rear Exhaust markings indicating not for road use or similar wording |7.1.4| | 2 |
| Front wheel bearings have excessive free play |2.3.5b| | 2 |
| Front wheel bearings are excessively rough |2.3.5b| | 2 |
| Front Brake indicates excessive fluctuation of brake effort (1.2.1 (e)) | 2 |
| Rear Brake excessively binding (1.2.1 (f)) | 2 |