| Most common failures | No# failures |
|---|
| Headlamp aim out of alignment | 18 |
| Registration plate issues | 11 |
| Rear reflector on motorcycle missing |1.4.1| | 7 |
| Front Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 3 |
| Stop lamp remains on when the brake is released |1.3.1e| | 3 |
| Headlamp not working on dipped beam (4.1.1 (a) (ii)) | 3 |
| Rear Rear reflector on motorcycle missing |1.4.1| | 2 |
| Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 2 |
| Horn not working |1.7.3a| | 2 |
| Throttle operating incorrectly |6.2.1f| | 2 |
| Rear position lamp does not illuminate immediately when it is switched on |1.1.3a| | 2 |
| Rear Roller brake test indicates brake effort fall disproportional to brake lever or pedal effort |3.3.A1c| | 2 |
| Nearside Rear Direction indicator not working |1.5.1c| | 2 |
| Front wheel bearings have excessive free play |2.3.5b| | 2 |
| Handlebar mounting clamp loose |2.1.1a| | 1 |
| Offside Front Direction indicator insecure |1.5.3b| | 1 |
| Rear Brake master cylinder leaking |1.1.10 |b| |ii|| | 1 |
| Rear Wheel spoke excessively loose |4.2.1b| | 1 |
| Throttle has a significant change in engine speed whilst moving the steering from lock to lock |2.1.4| | 1 |
| Rear Brake disc|s| has excessive run out |3.2.A1m| | 1 |
| Rear Rear wheel bearings have excessive free play |2.4.A.2c| | 1 |
| Headlamp not working on main beam (4.1.1 (a) (ii)) | 1 |
| Rear Wheel alignment incorrect which adversely affects the handling |2.5.1| | 1 |
| Horn not loud enough to be heard by another road user |1.7.3a| | 1 |
| Rear Direction indicator not working |1.5.1c| | 1 |
| Rear Position lamp not working (4.2.1 (a)) | 1 |
| Rear Stop lamp not working Not working on foot brake. (4.3.1 (a) (ii)) | 1 |
| Rear Brake caliper insecurely mounted and braking performance affected (1.1.16 (c) (ii)) | 1 |
| Rear All direction indicators not working (4.4.1 (a) (ii)) | 1 |
| Fuel system component leaking |7.2.1a| | 1 |
| Roller brake test The less effective brake control does not achieve an efficiency of 25%. |3.3.A2b| | 1 |
| Stop lamp not working (4.3.1 (a) (ii)) | 1 |
| Rear Hydraulic brake control feels spongy |3.1.4a| | 1 |
| Nearside Rear Direction indicator affected by the operation of another lamp |1.5.1c| | 1 |
| Central Fuel cap ineffective |6.1.3 |b| |i|| | 1 |
| Floor brake test The less effective brake control does not achieve an efficiency of 25%. |3.3.C1b| | 1 |
| Exhaust markings indicating not for road use or similar wording |7.1.4| | 1 |
| Front Roller brake test indicates excessive fluctuation of brake effort |3.3.A1d| | 1 |
| Direction indicators not working |1.5.1c| | 1 |
| Front Front suspension assembly excessive wear or free play in a front suspension component |2.3.4| | 1 |
| Nearside Rear Direction indicators not working |1.5.1c| | 1 |
| Rear Brake master cylinder fluid level dangerously low |3.2.B1d| | 1 |
| 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| | 1 |
| Stop lamp deteriorated and function impaired |1.3.3a| | 1 |
| Central Front Position lamp not working (4.2.1 (a)) | 1 |
| Front wheel spindle securing nut|s| loose |2.3.5a| | 1 |
| Offside Rear Brake disc|s| has excessive run out |3.2.A1m| | 1 |
| Front Direction indicator missing |1.5.1a| | 1 |
| Rear Direction indicator missing |1.5.1a| | 1 |
| Nearside Front Direction indicator not working |1.5.1c| | 1 |
| Offside Front Direction indicator not working |1.5.1c| | 1 |
| Offside Rear Direction indicator not working |1.5.1c| | 1 |
| Rear Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 1 |
| Nearside Direction indicator not working |1.5.1c| | 1 |