| Most common failures | No# failures |
|---|
| Headlamp aim out of alignment | 103 |
| Registration plate issues | 99 |
| Rear reflector on motorcycle missing |1.4.1| | 74 |
| Exhaust markings indicating not for road use or similar wording |7.1.4| | 20 |
| Rear position lamp does not illuminate immediately when it is switched on |1.1.3a| | 19 |
| Registration plate lamp issues | 19 |
| Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 16 |
| Rear Rear reflector on motorcycle missing |1.4.1| | 16 |
| Rear reflector missing (4.8.2 (a) (ii)) | 15 |
| Rear Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 15 |
| Front Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 12 |
| Front Brake lever has inadequate reserve travel |3.1.3b| | 12 |
| 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 |
| Rear reflector missing |4.8.2 |a| |ii|| | 8 |
| Horn not working |1.7.3a| | 8 |
| Rear Position lamp not working (4.2.1 (a)) | 8 |
| Rear Roller brake test indicates a binding brake |3.3.A1a| | 6 |
| Brake lever has inadequate reserve travel |3.1.3b| | 5 |
| Nearside Rear Direction indicator not working |1.5.1c| | 5 |
| Offside Front shock absorber seal failed and leaking oil |2.3.3| | 5 |
| Stop lamp remains on when the brakes are released | 4 |
| Front Hydraulic brake control feels spongy |3.1.4a| | 4 |
| Hazard warning switch missing |1.4.B.1d| | 4 |
| Front Stop lamp not working (4.3.1 (a) (ii)) | 4 |
| Nearside Front Front shock absorber seal failed and leaking oil |2.3.3| | 4 |
| Front Front wheel bearings have excessive free play |2.3.5b| | 4 |
| Horn not working (7.7 (a)) | 4 |
| Offside Front Front shock absorber seal failed and leaking oil |2.3.3| | 3 |
| Headlamp at least one does not illuminate on dipped beam |1.2.2a|i|| | 3 |
| Rear Stop lamp remains on when the brake is released |1.3.1e| | 3 |
| Rear wheel bearings have excessive free play |2.4.A.2c| | 3 |
| Front Wheel bearing rough when rotated (5.1.3 (b) (i)) | 3 |
| Offside Front Shock absorber has a serious fluid leak (5.3.2 (b)) | 3 |
| Front Brake lever has insufficient reserve travel (1.1.2 (a)) | 3 |
| Front wheel bearings have excessive free play |2.3.5b| | 3 |
| Nearside Rear Direction indicators not working |1.5.1c| | 3 |
| Rear Roller brake test indicates excessive fluctuation of brake effort |3.3.A1d| | 3 |
| Rear Brake indicates excessive fluctuation of brake effort |1.2.1 |e|| | 3 |
| Throttle operating incorrectly |6.2.1f| | 3 |
| Nearside Front Shock absorber has a serious fluid leak (5.3.2 (b)) | 3 |
| Front Roller brake test indicates excessive fluctuation of brake effort |3.3.A1d| | 3 |
| Rear Exhaust markings indicating not for road use or similar wording |7.1.4| | 3 |
| Rear Rear reflector missing (4.8.2 (a) (ii)) | 3 |
| Horn not loud enough to be heard by another road user |1.7.3a| | 3 |
| Roller brake test The less effective brake control does not achieve an efficiency of 25%. |3.3.A2b| | 2 |
| Nearside Front Brake disc contaminated |1.1.14 |b|| | 2 |
| Headlamp aim beam image kick up to the offside |1.6| | 2 |
| Front Front wheel bearings are excessively rough |2.3.5b| | 2 |
| Front Roller brake test indicates brake effort rise disproportional to brake lever or pedal effort |3.3.A1c| | 2 |
| Front Brake disc|s| friction surface contaminated by oil or grease |3.2.A1k| | 2 |
| Front shock absorber seal failed and leaking oil |2.3.3| | 2 |
| Rear Position lamp not working |4.2.1 |a|| | 2 |
| Stop lamp not working |4.3.1 |a| |ii|| | 2 |
| Throttle control functioning such that safe operation of the motorcycle is adversely affected sticking (6.2.7 (a) (ii)) | 2 |
| Nearside Front Position lamp not working (4.2.1 (a)) | 2 |
| Rear position lamp does not illuminate immediately when it is switched on (1.1.3a) | 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 |
| Rear Stop lamp does not illuminate immediately a brake applies (1.3.1a) | 2 |
| Stop lamp emits other than a steady red light (1.3.1b) | 2 |
| Front Stop lamp does not illuminate immediately a brake applies (1.3.1a) | 2 |
| Stop lamp does not emit a steady light (1.3.1b) | 2 |
| Rear Stop lamp not working (4.3.1 (a) (ii)) | 2 |
| Front Brake lever has insufficient reserve travel |1.1.2 |a|| | 2 |
| Offside Direction indicator not working |1.5.1c| | 2 |
| Offside Front Brake disc|s| friction surface contaminated by oil or grease |3.2.A1k| | 2 |
| Nearside Front shock absorber seal failed and leaking oil |2.3.3| | 2 |
| Nearside Front Brake disc|s| friction surface contaminated by oil or grease |3.2.A1k| | 2 |
| Rear Floor brake test indicates a binding brake |3.3.C2c| | 2 |
| Brake lever has insufficient reserve travel (1.1.2 (a)) | 2 |
| Direction indicators flashing more than 120 times per minute |1.5.1c| | 2 |
| Offside Front Shock absorber has a serious fluid leak |5.3.2 |b|| | 2 |
| Centre Rear reflector on motorcycle missing |1.4.1| | 2 |
| Rear Rear reflector missing |4.8.2 |a| |ii|| | 2 |
| Rear reflector on sidecar missing |1.4.1| | 2 |
| Rear Brake caliper|s| insecure |3.2.A1j| | 2 |
| Front Brake fluid reservoir fluid level dangerously low |3.2.B1d| | 2 |
| Horn not working |7.7 |a| |ii|| | 2 |
| Nearside Front Direction indicators not working |1.5.1c| | 2 |
| Exhaust is leaking and excessively noisey |7.1.1b| | 2 |
| Offside Front Shock absorbers has a serious fluid leak | 2 |
| Nearside Rear Direction indicator not working (4.4.1 (a) (ii)) | 2 |
| Rear Brake indicates excessive fluctuation of brake effort (1.2.1 (e)) | 2 |
| Front Stop lamp does not illuminate by the operation of both brake controls (4.3.2 (a) (iii)) | 2 |
| 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|| | 2 |
| Front Horn not working |1.7.3a| | 2 |
| Stop lamp remains on when the brake is released |1.3.1e| | 2 |