| Most common failures | No# failures |
|---|
| Headlamp aim out of alignment | 270 |
| Drive chain excessively loose |6.2.1d| | 80 |
| Front Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 71 |
| Steering movement excessively `notchy` with the wheel raised |2.2.1b| | 56 |
| Rear wheel bearings have excessive free play |2.4.A.2c| | 50 |
| Horn not working |1.7.3a| | 46 |
| Headlamp at least one does not illuminate on dipped beam |1.2.2a|i|| | 43 |
| Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 36 |
| Rear Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 33 |
| Registration plate issues | 32 |
| Front Roller brake test indicates a binding brake |3.3.A1a| | 29 |
| Steering movement excessively `notchy` with the weight on the lower bearing |2.2.1a| | 28 |
| Nearside Front shock absorber seal failed and leaking oil |2.3.3| | 26 |
| Rear position lamp does not illuminate immediately when it is switched on |1.1.3a| | 26 |
| Steering headbearing has excessive free play |2.2.2| | 26 |
| Registration plate lamp issues | 23 |
| Headlamp at least one does not illuminate on main beam |1.2.2a|ii|| | 22 |
| Drive chain worn to excess |6.2.1e| | 22 |
| Rear Brake disc|s| excessively worn |3.2.A1l| | 22 |
| Offside Front shock absorber seal failed and leaking oil |2.3.3| | 20 |
| Throttle operating incorrectly |6.2.1f| | 19 |
| Drive chain excessively tight |6.2.1d| | 18 |
| Front Stop lamp not working (4.3.1 (a) (ii)) | 16 |
| Rear Rear wheel bearings have excessive free play |2.4.A.2c| | 14 |
| Front position lamp does not illuminate immediately when switched on |1.1.3a| | 13 |
| Offside Front Front shock absorber seal failed and leaking oil |2.3.3| | 12 |
| Front Roller brake test indicates excessive fluctuation of brake effort |3.3.A1d| | 12 |
| Offside Front Shock absorber has a serious fluid leak (5.3.2 (b)) | 11 |
| Rear Roller brake test indicates excessive fluctuation of brake effort |3.3.A1d| | 11 |
| Horn not working (7.7 (a) (ii)) | 11 |
| Nearside Front Shock absorber has a serious fluid leak (5.3.2 (b)) | 10 |
| Rear Brake disc|s| cracked |3.2.A1g| | 10 |
| Headlamp not working on dipped beam (4.1.1 (a) (ii)) | 10 |
| Nearside Handlebar handgrip not secure to handlebars. |2.1.1c| | 10 |
| Front Brake excessively binding (1.2.1 (f)) | 9 |
| Rear Drive chain excessively loose |6.2.1d| | 9 |
| Front Steering headbearing has excessive free play |2.2.2| | 9 |
| Front Stop lamp not working |4.3.1 |a| |ii|| | 9 |
| Rear Brake disc significantly and obviously worn (1.1.14 (a) (i)) | 9 |
| Horn not working (7.7 (a)) | 9 |
| Rear Roller brake test indicates a binding brake |3.3.A1a| | 8 |
| Roller brake test The less effective brake control does not achieve an efficiency of 25%. |3.3.A2b| | 8 |
| Stop lamp not working (4.3.1 (a) (ii)) | 7 |
| Rear Wheel bearing has excessive play (5.1.3 (a) (i)) | 7 |
| Front Brake lever is so short and the brake cannot be readily applied |3.1.3c| | 7 |
| Front Valve stem seriously damaged (5.2.3 (j)) | 7 |
| Rear reflector on motorcycle missing |1.4.1| | 7 |
| Front shock absorber seal failed and leaking oil |2.3.3| | 7 |
| Front Headlamp at least one does not illuminate on dipped beam |1.2.2a|i|| | 7 |
| Steering headbearing has excessive wear or free play (2.2.2 (f) (i)) | 7 |
| Nearside Front Front shock absorber seal failed and leaking oil |2.3.3| | 6 |
| Front Steering movement excessively `notchy` with the wheel raised |2.2.1b| | 6 |
| Rear Drive chain sprocket worn to excess |6.2.1e| | 6 |
| Front Floor brake test indicates a binding brake |3.3.C2c| | 6 |
| Front Steering movement excessively `notchy` with the weight on the lower bearing |2.2.1a| | 6 |
| Headlamp not working on dipped beam |4.1.1 |a| |ii|| | 6 |
| Front Shock absorber has a serious fluid leak (5.3.2 (b)) | 6 |
| Front Brake lever is bent and the brake cannot be readily applied |3.1.3c| | 6 |
| Nearside Front Shock absorber has a serious fluid leak |5.3.2 |b|| | 6 |
| Stop lamp remains on when the brakes are released | 6 |
| Rear Position lamp not working (4.2.1 (a)) | 5 |
| Front Horn not working |1.7.3a| | 5 |
| Rear Brake disc fractured (1.1.14 (a) (ii)) | 5 |
| Rear Floor brake test indicates a binding brake |3.3.C2c| | 5 |
| Wheel alignment incorrect which adversely affects the handling |2.5.1| | 5 |
| Nearside Front Direction indicators not working |1.5.1c| | 5 |
| Headlamp not working on main beam (4.1.1 (a) (ii)) | 5 |
| Drive chain excessively tight (6.1.7 (k) (i)) | 5 |
| Front Brake indicates excessive fluctuation of brake effort (1.2.1 (e)) | 5 |
| Handlebar deformed |2.1.1b| | 5 |
| Drive chain excessively loose (6.1.7 (c) (i)) | 5 |
| Headlamp aim beam image kick up to the offside |1.6| | 5 |
| Headlamp not working on main beam |4.1.1 |a| |ii|| | 5 |