| Most common failures | No# failures |
|---|
| Headlamp aim out of alignment | 68 |
| Rear reflector on motorcycle missing |1.4.1| | 46 |
| Registration plate issues | 41 |
| Rear Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 26 |
| Front Roller brake test indicates a binding brake |3.3.A1a| | 15 |
| Front position lamp does not illuminate immediately when switched on |1.1.3a| | 14 |
| Rear position lamp does not illuminate immediately when it is switched on |1.1.3a| | 13 |
| Front Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 11 |
| Drive chain excessively loose |6.2.1d| | 11 |
| Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 10 |
| Rear Rear reflector on motorcycle missing |1.4.1| | 10 |
| Nearside Front shock absorber seal failed and leaking oil |2.3.3| | 9 |
| Horn not working |1.7.3a| | 7 |
| Offside Front shock absorber seal failed and leaking oil |2.3.3| | 7 |
| Drive chain worn to excess |6.2.1e| | 7 |
| Front shock absorber seal failed and leaking oil |2.3.3| | 7 |
| Headlamp at least one does not illuminate on dipped beam |1.2.2a|i|| | 5 |
| Rear wheel bearings have excessive free play |2.4.A.2c| | 5 |
| Rear shock absorber seal failed and leaking oil |2.4.A.1c| | 5 |
| Rear shock absorber has inadequate damping effect. |2.4.A.3b| | 5 |
| Rear position lamp adversely affected by the operation of another lamp |1.1.3b| | 5 |
| Offside Front Front shock absorber seal failed and leaking oil |2.3.3| | 4 |
| Nearside Front Front shock absorber seal failed and leaking oil |2.3.3| | 4 |
| Steering headbearing has excessive free play |2.2.2| | 4 |
| Rear Stop lamp not working |4.3.1 |a| |ii|| | 4 |
| Drive chain excessively tight |6.2.1d| | 4 |
| Front Brake excessively binding (1.2.1 (f)) | 4 |
| Direction indicators flashing more than 120 times per minute |1.5.1c| | 3 |
| Exhaust is leaking and excessively noisey |7.1.1b| | 3 |
| Offside Front Brake disc|s| friction surface contaminated by oil or grease |3.2.A1k| | 3 |
| Centre Rear Rear reflector on motorcycle missing |1.4.1| | 3 |
| Front Roller brake test indicates excessive fluctuation of brake effort |3.3.A1d| | 3 |
| Indicator tell tale not functioning |1.5.2| | 3 |
| Front Front position lamp does not illuminate immediately when switched on |1.1.3a| | 3 |
| 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| | 3 |
| Headlamp incorrect colour |1.2.1| | 3 |
| Front Direction indicator not working |1.5.1c| | 3 |
| Front Brake excessively binding |1.2.1 |f|| | 3 |
| Rear Drive chain excessively loose |6.2.1d| | 3 |
| Front position lamp incorrect colour |1.1.2a| | 3 |
| Wheel alignment incorrect which adversely affects the handling |2.5.1| | 3 |
| Front Floor brake test indicates a binding brake |3.3.C2c| | 3 |
| Nearside Front Direction indicators not working |1.5.1c| | 3 |
| Nearside Front Direction indicator insecure |1.5.3b| | 3 |
| Rear Roller brake test indicates a binding brake |3.3.A1a| | 3 |
| Front Position lamp not working (4.2.1 (a)) | 3 |
| Offside Front Shock absorber has a serious fluid leak (5.3.2 (b)) | 3 |
| Rear Brake excessively binding (1.2.1 (f)) | 3 |
| Rear Rear wheel bearings have excessive free play |2.4.A.2c| | 2 |
| Roller brake test The less effective brake control does not achieve an efficiency of 25%. |3.3.A2b| | 2 |
| Rear Brake cylinder insecurely mounted |3.2.B1a| | 2 |
| Locking devices not correctly fitted which may make the motor bicycle dangerous to ride |6.2.1h| | 2 |
| Nearside Direction indicator flashing more than 120 times per minute |1.5.1c| | 2 |
| Offside Direction indicator flashing more than 120 times per minute |1.5.1c| | 2 |
| Rear reflector missing |4.8.2 |a| |ii|| | 2 |
| Offside Front Direction indicator not working |1.5.1c| | 2 |
| Offside Rear Direction indicator not working |1.5.1c| | 2 |
| Front Brake disc|s| friction surface contaminated by oil or grease |3.2.A1k| | 2 |
| Horn not working |7.7 |a| |ii|| | 2 |
| Nearside Front Direction indicator not working |1.5.1c| | 2 |
| Nearside Front Direction indicators flashing more than 120 times per minute |1.5.1c| | 2 |
| Rear Floor brake test indicates a binding brake |3.3.C2c| | 2 |
| Nearside Headlamp at least one does not illuminate on dipped beam |1.2.2a|i|| | 2 |
| Headlamp at least one does not illuminate on main beam |1.2.2a|ii|| | 2 |
| Offside Rear position lamp does not illuminate immediately when it is switched on |1.1.3a| | 2 |
| Front Headlamp incorrect colour |1.2.1| | 2 |
| Nearside Handlebar handgrip not secure to handlebars. |2.1.1c| | 2 |
| Front position lamp missing |1.1.1a| | 2 |
| Throttle operating incorrectly |6.2.1f| | 2 |
| Rear Hydraulic brake control feels spongy |3.1.4a| | 2 |
| Nearside Rear position lamp does not illuminate immediately when it is switched on |1.1.3a| | 2 |
| Exhaust markings indicating not for road use or similar wording |7.1.4| | 2 |
| Front Brake component has restricted free movement and operation is likely to be impeded |3.2.A1h| | 2 |
| Registration plate lamp issues | 2 |
| Stop lamp remains on when the brakes are released | 2 |
| Rear reflector missing (4.8.2 (a) (ii)) | 2 |
| Front Brake indicates excessive fluctuation of brake effort (1.2.1 (e)) | 2 |
| Front Stop lamp not working (4.3.1 (a) (ii)) | 2 |