| Most common failures | No# failures |
|---|
| Headlamp aim out of alignment | 4 |
| Throttle operating incorrectly |6.2.1f| | 3 |
| Front Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 3 |
| Rear reflector on motorcycle missing |1.4.1| | 2 |
| 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 Direction indicator not working |1.5.1c| | 2 |
| Nearside Handlebar handgrip not secure to handlebars. |2.1.1c| | 2 |
| Headlamp aim beam image kick up to the offside |1.6| | 2 |
| Offside Rear Direction indicator incorrect colour |1.5.1b| | 1 |
| Front Position lamp switch does not operate the front and rear position lamps |1.1.4c| | 1 |
| Front Headlamp switch faulty |1.2.4| | 1 |
| Offside Rear Direction indicators not working |1.5.1c| | 1 |
| Front position lamp incorrect colour |1.1.2a| | 1 |
| Headlamp aim beam image kick-up is to the offside |1.6.1| | 1 |
| Offside Steering lock stop ineffective |2.1.3| | 1 |
| Offside Front position lamp adversely affected by the operation of another lamp |1.1.3b| | 1 |
| Offside Front shock absorber seal failed and leaking oil |2.3.3| | 1 |
| Rear reflector missing (4.8.2 (a) (ii)) | 1 |
| Front position lamp insecure |1.1.1c| | 1 |
| Rear wheel bearings have excessive free play |2.4.A.2c| | 1 |
| Drive chain worn to excess |6.2.1e| | 1 |
| Rear Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 1 |
| Roller brake test The less effective brake control does not achieve an efficiency of 25% (1.2.2 (a) (i)) | 1 |
| Offside Front Brake disc contaminated (1.1.14 (b)) | 1 |
| Exhaust is leaking and excessively noisey |7.1.1b| | 1 |
| Fuel tank insecure (6.1.3 (a) (i)) | 1 |
| Offside Front Shock absorber has a serious fluid leak (5.3.2 (b)) | 1 |
| Offside Front Brake hose leaking (1.1.12 (c)) | 1 |
| Front Horn not loud enough to be heard by another road user |1.7.3a| | 1 |
| Rear Brake hose which buldges |3.2.B4| | 1 |
| Headlamp not working on main beam (4.1.1 (a) (ii)) | 1 |