| Most common failures | No# failures |
|---|
| Headlamp aim out of alignment | 63 |
| Rear Roller brake test indicates a binding brake |3.3.A1a| | 29 |
| Rear Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 24 |
| Nearside Front shock absorber seal failed and leaking oil |2.3.3| | 21 |
| Front Roller brake test indicates a binding brake |3.3.A1a| | 21 |
| Offside Front shock absorber seal failed and leaking oil |2.3.3| | 14 |
| Registration plate issues | 14 |
| Front Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 11 |
| Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 11 |
| Front position lamp does not illuminate immediately when switched on |1.1.3a| | 10 |
| Front shock absorber seal failed and leaking oil |2.3.3| | 9 |
| Nearside Front Direction indicator not working |1.5.1c| | 8 |
| Rear shock absorber has inadequate damping effect. |2.4.A.3b| | 8 |
| Horn not working |1.7.3a| | 8 |
| Drive chain excessively loose |6.2.1d| | 7 |
| Steering headbearing has excessive free play |2.2.2| | 7 |
| Offside Front Front shock absorber seal failed and leaking oil |2.3.3| | 7 |
| Rear position lamp does not illuminate immediately when it is switched on |1.1.3a| | 6 |
| Headlamp at least one does not illuminate on dipped beam |1.2.2a|i|| | 6 |
| Front Floor brake test indicates a binding brake |3.3.C2c| | 6 |
| Offside Front Shock absorber has a serious fluid leak (5.3.2 (b)) | 6 |
| Headlamp aim beam image kick up to the offside |1.6| | 5 |
| Rear Drive chain excessively loose |6.2.1d| | 5 |
| Rear wheel bearings have excessive free play |2.4.A.2c| | 5 |
| Roller brake test The less effective brake control does not achieve an efficiency of 25%. |3.3.A2b| | 5 |
| Front Roller brake test indicates excessive fluctuation of brake effort |3.3.A1d| | 5 |
| Offside Rear Footrest insecure |6.2.1a| | 4 |
| Nearside Front Front shock absorber seal failed and leaking oil |2.3.3| | 4 |
| Rear Brake disc|s| excessively worn |3.2.A1l| | 4 |
| Wheel alignment incorrect which adversely affects the handling |2.5.1| | 4 |
| Offside Front Brake disc|s| friction surface contaminated by oil or grease |3.2.A1k| | 4 |
| Offside Rear Direction indicator not working |1.5.1c| | 3 |
| Front Headlamp at least one does not illuminate on dipped beam |1.2.2a|i|| | 3 |
| Rear Brake pedal has inadequate reserve travel |3.1.3b| | 3 |
| Headlamp at least one does not illuminate on main beam |1.2.2a|ii|| | 3 |
| Rear shock absorber seal failed and leaking oil |2.4.A.1c| | 3 |
| Front Brake disc|s| friction surface contaminated by oil or grease |3.2.A1k| | 3 |
| Nearside Front Direction indicators not working |1.5.1c| | 3 |
| Rear reflector on motorcycle missing |1.4.1| | 3 |
| Offside Front Footrest insecure |6.2.1a| | 3 |
| Nearside Front Brake disc|s| cracked |3.2.A1g| | 3 |
| Front Brake disc|s| cracked |3.2.A1g| | 3 |
| Throttle operating incorrectly |6.2.1f| | 3 |
| Rear Floor brake test indicates a binding brake |3.3.C2c| | 3 |
| Rear Brake disc|s| cracked |3.2.A1g| | 3 |
| Throttle has a significant change in engine speed whilst moving the steering from lock to lock |2.1.4| | 3 |
| Nearside Handlebar handgrip not secure to handlebars. |2.1.1c| | 3 |
| Nearside Front Direction indicator missing |1.5.1a| | 3 |
| Nearside Front Shock absorber has a serious fluid leak (5.3.2 (b)) | 3 |
| Rear Valve stem seriously damaged (5.2.3 (j)) | 3 |
| Rear Stop lamp not working (4.3.1 (a) (ii)) | 3 |
| Nearside Rear Direction indicator not working (4.4.1 (a) (ii)) | 3 |
| Front wheel bearings have excessive free play |2.3.5b| | 2 |
| Horn not loud enough to be heard by another road user |1.7.3a| | 2 |
| Nearside Rear Direction indicator not working |1.5.1c| | 2 |
| Steering movement excessively stiff with the wheel raised |2.2.1b| | 2 |
| Offside Front Direction indicator not working |1.5.1c| | 2 |
| Nearside Rear Footrest missing |6.2.1a| | 2 |
| Nearside Rear Direction indicators not working |1.5.1c| | 2 |
| Roller brake test No brake control achieves an efficiency of 30%. |3.3.A2a| | 2 |
| Roller brake test Neither brake control achieves an efficiency of 25% |3.3.A2b| | 2 |
| Exhaust markings indicating not for road use or similar wording |7.1.4| | 2 |
| Front Brake lever has inadequate reserve travel |3.1.3b| | 2 |
| Headlamp insecure |1.2.3b| | 2 |
| Wheel alignment incorrect which adversely affects the steering |2.5.1| | 2 |
| Offside Steering lock stop ineffective |2.1.3| | 2 |
| Rear Rear position lamp does not illuminate immediately when it is switched on |1.1.3a| | 2 |
| Rear Roller brake test indicates a sticking brake |3.3.A1a| | 2 |
| Direction indicators flashing more than 120 times per minute |1.5.1c| | 2 |
| Offside Front Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 2 |
| Front Roller brake test indicates a severely juddering brake |3.3.A1b| | 2 |
| Front Roller brake test indicates a sticking brake |3.3.A1a| | 2 |
| Offside Front Brake disc|s| cracked |3.2.A1g| | 2 |
| Rear Rear reflector on motorcycle missing |1.4.1| | 2 |
| Front Plate brake test indicates a binding brake |3.3.B1a| | 2 |
| Fuel hose leaking |7.2.1a| | 2 |
| Offside Rear position lamp does not illuminate immediately when it is switched on |1.1.3a| | 2 |
| Rear Brake cylinder severely corroded |3.2.B1b| | 2 |
| Rear Rear shock absorber has inadequate damping effect. |2.4.A.3b| | 2 |
| Front Stop lamp remains on when the brake is released |1.3.1e| | 2 |
| Front Horn not working |1.7.3a| | 2 |
| Rear Drive chain fouling another component |6.2.1d| | 2 |
| Nearside Rear Footrest insecure |6.2.1a| | 2 |
| Rear Brake caliper|s| insecure |3.2.A1j| | 2 |
| Front Front position lamp does not illuminate immediately when switched on |1.1.3a| | 2 |
| Front Valve stem seriously damaged (5.2.3 (j)) | 2 |
| Stop lamp remains on when the brakes are released | 2 |
| Front Stop lamp not working (4.3.1 (a) (ii)) | 2 |
| Front Position lamp not working (4.2.1 (a)) | 2 |
| Rear Shock absorber has a serious fluid leak (5.3.2 (b)) | 2 |
| Rear Stop lamp does not illuminate by the operation of both brake controls (4.3.2 (a) (iii)) | 2 |
| Front Stop lamp does not illuminate by the operation of both brake controls (4.3.2 (a) (iii)) | 2 |