| Most common failures | No# failures |
|---|
| Headlamp aim out of alignment | 105 |
| Registration plate issues | 83 |
| Rear reflector on motorcycle missing |1.4.1| | 61 |
| Rear reflector missing (4.8.2 (a) (ii)) | 17 |
| Registration plate lamp issues | 16 |
| Exhaust markings indicating not for road use or similar wording |7.1.4| | 14 |
| Rear position lamp does not illuminate immediately when it is switched on |1.1.3a| | 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| | 11 |
| Front Brake lever has inadequate reserve travel |3.1.3b| | 10 |
| Front Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 9 |
| Rear Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 9 |
| Front Hydraulic brake control feels spongy |3.1.4a| | 8 |
| Stop lamp remains on when the brakes are released | 8 |
| Rear reflector missing |4.8.2 |a| |ii|| | 6 |
| Nearside Front Shock absorber has a serious fluid leak (5.3.2 (b)) | 6 |
| Front Brake lever has insufficient reserve travel (1.1.2 (a)) | 6 |
| Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 6 |
| Offside Front Shock absorber has a serious fluid leak (5.3.2 (b)) | 5 |
| Rear Position lamp not working (4.2.1 (a)) | 5 |
| Rear Rear reflector on motorcycle missing |1.4.1| | 5 |
| Front Stop lamp not working (4.3.1 (a) (ii)) | 5 |
| Horn not working |1.7.3a| | 5 |
| Rear Roller brake test indicates excessive fluctuation of brake effort |3.3.A1d| | 5 |
| Offside Front Direction indicators not working |1.5.1c| | 4 |
| Front shock absorber seal failed and leaking oil |2.3.3| | 3 |
| Exhaust markings indicating not for road use or similar wording (6.1.2 (c)) | 3 |
| Stop lamp not working (4.3.1 (a) (ii)) | 3 |
| 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|| | 3 |
| Rear Position lamp not working |4.2.1 |a|| | 3 |
| Rear Brake pedal has insufficient reserve travel (1.1.2 (a)) | 3 |
| Brake lever has inadequate reserve travel |3.1.3b| | 3 |
| Rear Brake excessively binding |1.2.1 |f|| | 3 |
| Front position lamp incorrect colour |1.1.2a| | 3 |
| Front Roller brake test indicates excessive fluctuation of brake effort |3.3.A1d| | 3 |
| Rear reflector on motorcycle obscured |1.4.1| | 3 |
| Rear Rear position lamp does not illuminate immediately when it is switched on |1.1.3a| | 3 |
| Brake lever has insufficient reserve travel (1.1.2 (a)) | 3 |
| Nearside Front Brake disc contaminated (1.1.14 (b)) | 2 |
| Offside Rear Direction indicator not working (4.4.1 (a) (ii)) | 2 |
| Horn not working (7.7 (a)) | 2 |
| All direction indicators not working (4.4.1 (a) (ii)) | 2 |
| Rear Stop lamp not working (4.3.1 (a) (ii)) | 2 |
| Offside Front Brake caliper|s| securing bolt|s| loose |3.2.A1j| | 2 |
| Stop lamp remains on when the brake is released |1.3.1e| | 2 |
| Horn not working (7.7 (a) (ii)) | 2 |
| Nearside Handlebar handgrip not secure to handlebars. |2.1.1c| | 2 |
| Front Brake disc|s| excessively worn |3.2.A1l| | 2 |
| Front position lamp does not illuminate immediately when switched on |1.1.3a| | 2 |
| Front Brake indicates excessive fluctuation of brake effort |1.2.1 |e|| | 2 |
| Rear position lamp adversely affected by the operation of another lamp |1.1.3b| | 2 |
| Exhaust is leaking and excessively noisey |7.1.1b| | 2 |
| Rear Brake indicates excessive fluctuation of brake effort (1.2.1 (e)) | 2 |
| Front Brake disc|s| has excessive run out |3.2.A1m| | 2 |
| Nearside Rear Direction indicator not working (4.4.1 (a) (ii)) | 2 |
| Stop lamp not working |4.3.1 |a| |ii|| | 2 |
| Front Stop lamp not working |4.3.1 |a| |ii|| | 2 |
| Throttle operating incorrectly |6.2.1f| | 2 |
| Rear Rear reflector missing (4.8.2 (a) (ii)) | 2 |
| Front wheel bearings have excessive free play |2.3.5b| | 2 |
| Rear Brake has no recorded effort at a wheel (1.2.1 (a) (ii)) | 2 |
| Nearside Rear Direction indicators not working |1.5.1c| | 2 |
| Offside Front Brake lever has inadequate reserve travel |3.1.3b| | 2 |
| Direction indicators flashing more than 120 times per minute |1.5.1c| | 2 |