| Most common failures | No# failures |
|---|
| Headlamp aim out of alignment | 117 |
| Rear Roller brake test indicates a binding brake |3.3.A1a| | 46 |
| Front Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 39 |
| Nearside Front shock absorber seal failed and leaking oil |2.3.3| | 31 |
| Offside Front shock absorber seal failed and leaking oil |2.3.3| | 26 |
| Horn not working |1.7.3a| | 25 |
| Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 25 |
| Offside Front Footrest insecure |6.2.1a| | 22 |
| Drive chain excessively loose |6.2.1d| | 22 |
| Front Roller brake test indicates a binding brake |3.3.A1a| | 21 |
| Rear Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 20 |
| Rear Floor brake test indicates a binding brake |3.3.C2c| | 19 |
| Nearside Front Footrest insecure |6.2.1a| | 18 |
| Headlamp at least one does not illuminate on dipped beam |1.2.2a|i|| | 15 |
| Nearside Front Front shock absorber seal failed and leaking oil |2.3.3| | 14 |
| Registration plate issues | 12 |
| Rear position lamp does not illuminate immediately when it is switched on |1.1.3a| | 11 |
| Front Roller brake test indicates excessive fluctuation of brake effort |3.3.A1d| | 11 |
| Front Brake lever has inadequate reserve travel |3.1.3b| | 10 |
| Drive chain excessively tight |6.2.1d| | 10 |
| Headlamp at least one does not illuminate on main beam |1.2.2a|ii|| | 10 |
| Drive chain worn to excess |6.2.1e| | 10 |
| Nearside Rear Direction indicator not working |1.5.1c| | 9 |
| Nearside Front Direction indicator not working |1.5.1c| | 9 |
| Front shock absorber seal failed and leaking oil |2.3.3| | 9 |
| Roller brake test The less effective brake control does not achieve an efficiency of 25%. |3.3.A2b| | 8 |
| Offside Front Direction indicator not working |1.5.1c| | 8 |
| Front wheel bearings have excessive free play |2.3.5b| | 8 |
| Rear Brake excessively binding (1.2.1 (f)) | 8 |
| Offside Front Front shock absorber seal failed and leaking oil |2.3.3| | 7 |
| Rear Roller brake test indicates a sticking brake |3.3.A1a| | 7 |
| Rear Brake disc|s| excessively worn |3.2.A1l| | 7 |
| Offside Footrest insecure |6.2.1a| | 7 |
| Nearside Front Direction indicators not working |1.5.1c| | 7 |
| Nearside Front Shock absorber has a serious fluid leak (5.3.2 (b)) | 7 |
| Rear shock absorber has inadequate damping effect. |2.4.A.3b| | 6 |
| Rear wheel bearings have excessive free play |2.4.A.2c| | 6 |
| Rear Brake disc|s| cracked |3.2.A1g| | 6 |
| Nearside Front Brake disc|s| excessively worn |3.2.A1l| | 6 |
| Rear suspension bearing has excessive free play |2.4.A2a|i|| | 5 |
| Horn not loud enough to be heard by another road user |1.7.3a| | 5 |
| Front Front position lamp does not illuminate immediately when switched on |1.1.3a| | 5 |
| Offside Rear Direction indicators not working |1.5.1c| | 5 |
| Rear Wheel alignment incorrect which adversely affects the handling |2.5.1| | 5 |
| Front Headlamp at least one does not illuminate on dipped beam |1.2.2a|i|| | 5 |
| Nearside Footrest insecure |6.2.1a| | 5 |
| Rear Floor brake test indicates a sticking brake |3.3.C2c| | 5 |
| Throttle operating incorrectly |6.2.1f| | 4 |
| Nearside Rear Direction indicators not working |1.5.1c| | 4 |
| Offside Front Brake disc|s| friction surface contaminated by oil or grease |3.2.A1k| | 4 |
| Direction indicators not working |1.5.1c| | 4 |
| Offside Brake disc|s| friction surface contaminated by oil or grease |3.2.A1k| | 4 |
| Offside Front Brake disc|s| excessively worn |3.2.A1l| | 4 |
| Nearside Front Direction indicator insecure |1.5.3b| | 4 |
| Rear Roller brake test indicates excessive fluctuation of brake effort |3.3.A1d| | 4 |
| Rear reflector on motorcycle missing |1.4.1| | 4 |
| Wheel alignment incorrect which adversely affects the handling |2.5.1| | 4 |
| Headlamp aim so that beam "kick up" is not visible on the screen |4.1.2 |a|| | 4 |
| Front Wheel has an excessively distorted bead rim. |4.2.2| | 4 |
| Nearside Front Direction indicator not working |4.4.1 |a| |ii|| | 4 |
| Offside Front Shock absorber has a serious fluid leak (5.3.2 (b)) | 4 |
| Drive chain excessively loose (6.1.7 (c) (i)) | 4 |
| Steering control fouling between components which interferes with the free movement of the steering |2.1.2a| | 3 |
| Offside Rear Direction indicator not working |1.5.1c| | 3 |
| Front Floor brake test indicates a binding brake |3.3.C2c| | 3 |
| Direction indicators flashing more than 120 times per minute |1.5.1c| | 3 |
| Rear Brake excessively binding |1.2.1 |f|| | 3 |
| Offside Rear position lamp does not illuminate immediately when it is switched on |1.1.3a| | 3 |
| Front Horn not working |1.7.3a| | 3 |
| Drive chain excessively loose |6.1.7 |c| |i|| | 3 |
| Offside Front Direction indicator insecure |1.5.3b| | 3 |
| Steering control handlebar movement restricted by taut cables |2.1.2c| | 3 |
| Headlamp aim beam image kick up to the offside |1.6| | 3 |
| Horn not working |7.7 |a| |ii|| | 3 |
| Nearside Headlamp at least one does not illuminate on dipped beam |1.2.2a|i|| | 3 |
| Throttle has a significant change in engine speed whilst moving the steering from lock to lock |2.1.4| | 3 |
| Front position lamp does not illuminate immediately when switched on |1.1.3a| | 3 |
| Rear Rear position lamp does not illuminate immediately when it is switched on |1.1.3a| | 3 |
| Front Brake excessively binding (1.2.1 (f)) | 3 |
| Offside Front Brake disc contaminated (1.1.14 (b)) | 3 |