| Most common failures | No# failures |
|---|
| Headlamp aim out of alignment | 81 |
| Front Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 22 |
| Drive chain excessively loose |6.2.1d| | 19 |
| Rear Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 17 |
| Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 15 |
| Rear wheel bearings have excessive free play |2.4.A.2c| | 12 |
| Registration plate lamp issues | 9 |
| Steering movement excessively `notchy` with the wheel raised |2.2.1b| | 9 |
| Rear position lamp does not illuminate immediately when it is switched on |1.1.3a| | 9 |
| Registration plate issues | 9 |
| Horn not working |1.7.3a| | 8 |
| Front Brake excessively binding (1.2.1 (f)) | 8 |
| Drive chain worn to excess |6.2.1e| | 7 |
| Steering headbearing has excessive free play |2.2.2| | 7 |
| Front Stop lamp not working (4.3.1 (a) (ii)) | 7 |
| Rear Rear wheel bearings have excessive free play |2.4.A.2c| | 7 |
| Steering movement excessively `notchy` with the weight on the lower bearing |2.2.1a| | 6 |
| Nearside Front shock absorber seal failed and leaking oil |2.3.3| | 6 |
| Headlamp at least one does not illuminate on dipped beam |1.2.2a|i|| | 6 |
| Horn not working (7.7 (a)) | 5 |
| Offside Front shock absorber seal failed and leaking oil |2.3.3| | 5 |
| Headlamp at least one does not illuminate on main beam |1.2.2a|ii|| | 5 |
| Headlamp not working on dipped beam (4.1.1 (a) (ii)) | 4 |
| Nearside Front Shock absorber has a serious fluid leak (5.3.2 (b)) | 4 |
| Horn not working (7.7 (a) (ii)) | 4 |
| Nearside Front Front shock absorber seal failed and leaking oil |2.3.3| | 4 |
| Rear Wheel bearing has excessive play (5.1.3 (a) (i)) | 4 |
| Rear Stop lamp not working |4.3.1 |a| |ii|| | 4 |
| Rear Wheel bearing has excessive play |5.1.3 |a| |i|| | 4 |
| Steering headbearing excessively stiff or notchy (2.2.2 (f) (i)) | 4 |
| Handlebar deformed |2.1.1b| | 4 |
| Front Roller brake test indicates a binding brake |3.3.A1a| | 4 |
| Drive chain excessively loose (6.1.7 (c) (i)) | 3 |
| Front Shock absorber has a serious fluid leak (5.3.2 (b)) | 3 |
| Drive chain excessively tight |6.2.1d| | 3 |
| Throttle operating incorrectly |6.2.1f| | 3 |
| Rear Valve stem seriously damaged (5.2.3 (j)) | 3 |
| Offside Front Shock absorber has a serious fluid leak (5.3.2 (b)) | 3 |
| Drive chain worn to excess (6.1.7 (c) (i)) | 3 |
| Rear Brake disc significantly and obviously worn (1.1.14 (a) (i)) | 3 |
| Nearside Handlebar handgrip not secure to handlebars. |2.1.1c| | 3 |
| Rear Stop lamp not working (4.3.1 (a) (ii)) | 3 |
| Rear Wheel alignment incorrect which adversely affects the handling |2.5.1| | 3 |
| Rear Position lamp not working (4.2.1 (a)) | 3 |
| Rear reflector missing (4.8.2 (a) (ii)) | 2 |
| Headlamp incorrect colour (4.1.4 (a)) | 2 |
| Front Brake lever has insufficient reserve travel (1.1.2 (a)) | 2 |
| Stop lamp not working (4.3.1 (a) (ii)) | 2 |
| Rear Roller brake test indicates a binding brake |3.3.A1a| | 2 |
| Front mudguard insecure |2.3.7| | 2 |
| Rear Brake fluid reservoir fluid level dangerously low |3.2.B1d| | 2 |
| Rear Drive chain sprocket worn to excess |6.2.1e| | 2 |
| Offside Front Footrest insecure (6.2.12 (a)) | 2 |
| Rear Brake excessively binding (1.2.1 (f)) | 2 |
| Front Front shock absorber seal failed and leaking oil |2.3.3| | 2 |
| Front Horn not working |1.7.3a| | 2 |
| Horn not working |7.7 |a| |ii|| | 2 |
| Rear Brake disc|s| excessively scored |3.2.A1l| | 2 |
| Front Stop lamp does not illuminate by the operation of both brake controls (4.3.2 (a) (iii)) | 2 |
| Nearside Handlebar grip insecure to handlebar (2.2.1 (d) (ii)) | 2 |
| Front Floor brake test indicates a binding brake |3.3.C2c| | 2 |
| Rear Brake disc|s| is excessively distorted |3.2.A1m| | 2 |
| Riders seat insecure |6.2.1a| | 2 |
| Rear Stop lamp does not illuminate by the operation of both brake controls (4.3.2 (a) (iii)) | 2 |
| Rear Position lamp not working |4.2.1 |a|| | 2 |
| Nearside Front Shock absorber has a serious fluid leak |5.3.2 |b|| | 2 |
| Front Brake excessively binding |1.2.1 |f|| | 2 |
| Horn not loud enough to be heard by another road user |1.7.3a| | 2 |
| Headlamp incorrect colour |1.2.1| | 2 |
| Drive chain excessively tight (6.1.7 (k) (i)) | 2 |