| Most common failures | No# failures |
|---|
| Registration plate issues | 50 |
| Headlamp aim out of alignment | 45 |
| Rear reflector on motorcycle missing |1.4.1| | 44 |
| 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| | 19 |
| Headlamp aim beam image kick up to the offside |1.6| | 16 |
| Rear Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 16 |
| Front Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 12 |
| Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 11 |
| Rear Rear reflector on motorcycle missing |1.4.1| | 11 |
| Front Roller brake test indicates a binding brake |3.3.A1a| | 10 |
| Front position lamp does not illuminate immediately when switched on |1.1.3a| | 9 |
| Horn not working |1.7.3a| | 9 |
| Registration plate lamp issues | 8 |
| Steering headbearing has excessive free play |2.2.2| | 8 |
| Offside Front shock absorber seal failed and leaking oil |2.3.3| | 7 |
| Nearside Rear Direction indicator not working |1.5.1c| | 7 |
| Drive chain excessively loose |6.2.1d| | 7 |
| Drive chain excessively tight |6.2.1d| | 7 |
| Exhaust markings indicating not for road use or similar wording |7.1.4| | 6 |
| Rear Rear shock absorber has inadequate damping effect. |2.4.A.3b| | 6 |
| Nearside Front shock absorber seal failed and leaking oil |2.3.3| | 6 |
| Nearside Front Direction indicator not working |1.5.1c| | 6 |
| Direction indicators flashing more than 120 times per minute |1.5.1c| | 5 |
| Headlamp at least one does not illuminate on dipped beam |1.2.2a|i|| | 5 |
| Rear shock absorber has inadequate damping effect. |2.4.A.3b| | 5 |
| Rear shock absorber insecurely mounted |2.4.A.3b| | 5 |
| Rear position lamp does not illuminate immediately when it is switched on |1.1.3a| | 5 |
| Offside Rear Direction indicators not working |1.5.1c| | 5 |
| Rear reflector missing |4.8.2 |a| |ii|| | 4 |
| Riders seat insecure |6.2.1a| | 4 |
| Rear wheel bearings have excessive free play |2.4.A.2c| | 4 |
| Rear 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| | 4 |
| Headlamp at least one does not illuminate on main beam |1.2.2a|ii|| | 4 |
| Front Brake excessively binding |1.2.1 |f|| | 3 |
| Roller brake test The less effective brake control does not achieve an efficiency of 25%. |3.3.A2b| | 3 |
| Front Roller brake test indicates excessive fluctuation of brake effort |3.3.A1d| | 3 |
| Rear suspension bearing has excessive free play |2.4.A2a|i|| | 3 |
| Offside Rear Direction indicator not working |1.5.1c| | 3 |
| Offside Front Footrest insecure |6.2.1a| | 3 |
| Offside Front Front shock absorber seal failed and leaking oil |2.3.3| | 3 |
| Front Brake disc|s| friction surface contaminated by oil or grease |3.2.A1k| | 3 |
| Offside Rear Direction indicator not working (4.4.1 (a) (ii)) | 3 |
| Rear Brake pedal has inadequate reserve travel |3.1.3b| | 3 |
| Exhaust is leaking and excessively noisey |7.1.1b| | 3 |
| Drive chain worn to excess |6.2.1e| | 3 |
| Headlamp aim beam image kick-up is to the offside |1.6.1| | 3 |
| Rear Exhaust mounting does not fully support the exhaust system |7.1.1.c| | 3 |
| Front Brake lever has inadequate reserve travel |3.1.3b| | 3 |
| Rear Rear position lamp does not illuminate immediately when it is switched on |1.1.3a| | 3 |
| Rear Exhaust is leaking and excessively noisey |7.1.1b| | 3 |
| Offside Front Direction indicators not working |1.5.1c| | 3 |
| Offside Front Direction indicator not working |1.5.1c| | 3 |
| Rear Rear wheel bearings have excessive free play |2.4.A.2c| | 3 |
| Rear suspension movement is excessively stiff |2.4.A.3b| | 3 |
| Rear Roller brake test indicates a binding brake |3.3.A1a| | 3 |
| Offside Front Brake disc|s| friction surface contaminated by oil or grease |3.2.A1k| | 2 |
| Rear reflector missing (4.8.2 (a) (ii)) | 2 |
| Front Stop lamp not working (4.3.1 (a) (ii)) | 2 |
| Fuel tank leaking |7.2.1a| | 2 |
| Nearside Rear Direction indicator not working (4.4.1 (a) (ii)) | 2 |
| Rear Hydraulic brake control feels spongy |3.1.4a| | 2 |
| Front Position lamp not working |4.2.1 |a|| | 2 |
| Steering damper in such a condition that the steering action is adversely affected (2.1.4 (d) (ii)) | 2 |
| Headlamp aim so that beam "kick up" is not visible on the screen |1.6.B.1| | 2 |
| Front Roller brake test indicates a severely grabbing brake |3.3.A1b| | 2 |
| Front Brake hose is likely to be fouled or trapped by moving parts |3.2.B2c| | 2 |
| Nearside Drive chain excessively loose |6.2.1d| | 2 |
| Front Floor brake test indicates a sticking brake |3.3.C2c| | 2 |
| Nearside Rear Direction indicators not working |1.5.1c| | 2 |
| Front shock absorber seal failed and leaking oil |2.3.3| | 2 |
| Steering control fouling between components which interferes with the free movement of the steering |2.1.2a| | 2 |
| Rear suspension has a fracture of a load bearing member or its supporting structure. |2.4.A.2d| | 2 |
| Horn sound not in accordance with requirements (7.7 (c)) | 2 |
| Rear position lamp adversely affected by the operation of another lamp |1.1.3b| | 2 |
| Horn missing |1.7.1| | 2 |
| Throttle operating incorrectly |6.2.1f| | 2 |
| Rear Roller brake test indicates brake effort rise disproportional to brake lever or pedal effort |3.3.A1c| | 2 |
| Horn not working |7.7 |a| |ii|| | 2 |
| Nearside Handlebar grip insecure to handlebar (2.2.1 (d) (ii)) | 2 |
| Front Brake master cylinder insecurely mounted |3.2.B1a| | 2 |
| Rear wheel spindle securing nut locking device missing |2.4.A.2b| | 2 |
| Nearside Front Direction indicators not working |1.5.1c| | 2 |
| Exhaust mounting does not fully support the exhaust system |7.1.1.c| | 2 |
| Direction indicators not working |1.5.1c| | 2 |
| Front Brake lever has insufficient reserve travel (1.1.2 (a)) | 2 |
| Rear suspension bush has excessive free play |2.4.A2a|i|| | 2 |
| Front Steering headbearing has excessive free play |2.2.2| | 2 |
| Offside Rear Direction indicator incorrect colour |1.5.1b| | 2 |