| Most common failures | No# failures |
|---|
| Headlamp aim out of alignment | 45 |
| Drive chain excessively loose |6.2.1d| | 37 |
| Rear wheel bearings have excessive free play |2.4.A.2c| | 33 |
| Registration plate issues | 27 |
| Rear Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 25 |
| Rear Wheel bearing has excessive play |5.1.3 |a| |i|| | 23 |
| Rear Wheel bearing has excessive play (5.1.3 (a) (i)) | 22 |
| Drive chain worn to excess |6.2.1e| | 21 |
| Rear Rear wheel bearings have excessive free play |2.4.A.2c| | 14 |
| Nearside Front Shock absorber has a serious fluid leak (5.3.2 (b)) | 12 |
| Rear Brake disc|s| excessively worn |3.2.A1l| | 10 |
| Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 10 |
| Rear Stop lamp not working (4.3.1 (a) (ii)) | 10 |
| Front Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 9 |
| Front wheel bearings have excessive free play |2.3.5b| | 9 |
| Front Brake excessively binding (1.2.1 (f)) | 8 |
| Offside Front Shock absorber has a serious fluid leak (5.3.2 (b)) | 8 |
| Rear Brake excessively binding (1.2.1 (f)) | 8 |
| Rear reflector on motorcycle missing |1.4.1| | 7 |
| Drive chain excessively tight |6.2.1d| | 7 |
| Rear Drive chain sprocket worn to excess |6.2.1e| | 7 |
| Headlamp at least one does not illuminate on dipped beam |1.2.2a|i|| | 7 |
| Rear Stop lamp not working |4.3.1 |a| |ii|| | 7 |
| Rear Roller brake test indicates a binding brake |3.3.A1a| | 7 |
| Drive chain excessively loose (6.1.7 (c) (i)) | 7 |
| Nearside Front shock absorber seal failed and leaking oil |2.3.3| | 6 |
| Drive chain excessively loose |6.1.7 |c| |i|| | 6 |
| Rear position lamp does not illuminate immediately when it is switched on |1.1.3a| | 6 |
| Rear Shock absorber has negligible damping effect (5.3.2 (b)) | 6 |
| Drive chain worn to excess (6.1.7 (c) (i)) | 6 |
| Steering headbearing excessively stiff or notchy (2.2.2 (f) (i)) | 6 |
| Roller brake test The less effective brake control does not achieve an efficiency of 25% (1.2.2 (a) (i)) | 6 |
| Front Roller brake test indicates a binding brake |3.3.A1a| | 5 |
| Stop lamp remains on when the brakes are released | 5 |
| Roller brake test The less effective brake control does not achieve an efficiency of 25%. |3.3.A2b| | 5 |
| Front Wheel bearing has excessive play |5.1.3 |a| |i|| | 5 |
| Handlebar deformed |2.1.1b| | 5 |
| Wheel alignment incorrect which adversely affects the handling |2.5.1| | 5 |
| Front Wheel bearing has excessive play (5.1.3 (a) (i)) | 5 |
| Headlamp not working on dipped beam (4.1.1 (a) (ii)) | 5 |
| Front Stop lamp not working (4.3.1 (a) (ii)) | 5 |
| Rear Brake disc significantly and obviously worn (1.1.14 (a) (i)) | 5 |
| Drive chain so worn it is likely to fail (6.1.7 (c) (ii)) | 5 |
| Stop lamp not working (4.3.1 (a) (ii)) | 5 |
| Offside Front shock absorber seal failed and leaking oil |2.3.3| | 4 |
| Front Brake disc|s| excessively worn |3.2.A1l| | 4 |
| Offside Front Shock absorber has a serious fluid leak |5.3.2 |b|| | 4 |
| Front Brake excessively binding |1.2.1 |f|| | 4 |
| Brake lever cannot be applied smoothly |3.1.3d| | 4 |
| Steering headbearing has excessive free play |2.2.2| | 4 |
| Rear Shock absorber has a serious fluid leak |5.3.2 |b|| | 4 |
| Drive chain worn to excess |6.1.7 |c| |i|| | 4 |
| Rear wheel spindle loose |2.4.A.2b| | 4 |
| Front Stop lamp not working |4.3.1 |a| |ii|| | 4 |
| Stop lamp not working |4.3.1 |a| |ii|| | 4 |
| Rear Valve stem seriously damaged (5.2.3 (j)) | 4 |
| Rear Brake indicates excessive fluctuation of brake effort (1.2.1 (e)) | 4 |
| Front Wheel bearing rough when rotated (5.1.3 (b) (i)) | 4 |
| Rear Wheel bearing play so excessive it is likely to break up (5.1.3 (a) (ii)) | 4 |
| Rear Stop lamp switch with a delay in operation (4.3.2 (a) (ii)) | 4 |
| Front Brake indicates excessive fluctuation of brake effort (1.2.1 (e)) | 4 |
| Stop lamp does not illuminate by the operation of both brake controls (4.3.2 (a) (iii)) | 4 |
| Horn not working (7.7 (a)) | 4 |
| Horn control defective |1.7.2a| | 3 |
| Steering movement excessively `notchy` with the wheel raised |2.2.1b| | 3 |
| Front wheel bearings are excessively rough |2.3.5b| | 3 |
| Horn not working |7.7 |a| |ii|| | 3 |
| Front Wheel bearing play so excessive it is likely to break up |5.1.3 |a| |ii|| | 3 |
| Rear Drive chain worn to excess |6.2.1e| | 3 |
| Front shock absorber seal failed and leaking oil |2.3.3| | 3 |
| Nearside Front Shock absorber has a serious fluid leak |5.3.2 |b|| | 3 |
| Steering headbearing has excessive wear or free play |2.2.2 |f| |i|| | 3 |
| Nearside Front Front shock absorber seal failed and leaking oil |2.3.3| | 3 |
| Nearside Handlebar handgrip not secure to handlebars. |2.1.1c| | 3 |
| Rear Roller brake test indicates excessive fluctuation of brake effort |3.3.A1d| | 3 |
| Rear Position lamp not working |4.2.1 |a|| | 3 |
| Roller brake test The less effective brake control does not achieve an efficiency of 25% |1.2.2 |a| |i|| | 3 |
| Rear Drive chain sprocket so worn it is likely to fail (6.1.7 (c) (ii)) | 3 |
| Front Headlamp not working on dipped beam (4.1.1 (a) (ii)) | 3 |
| Rear Wheel spindle loose (5.2.1 (c) (i)) | 3 |
| Front Brake disc significantly and obviously worn (1.1.14 (a) (i)) | 3 |
| Front Valve stem seriously damaged (5.2.3 (j)) | 3 |
| Rear Position lamp not working (4.2.1 (a)) | 3 |
| Front Shock absorber has a serious fluid leak (5.3.2 (b)) | 3 |
| Steering headbearing has excessive wear or free play (2.2.2 (f) (i)) | 3 |