| Most common failures | No# failures |
|---|
| Headlamp aim out of alignment | 459 |
| Registration plate issues | 141 |
| Registration plate lamp issues | 126 |
| Rear Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 115 |
| Front Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 89 |
| Drive chain excessively loose |6.2.1d| | 88 |
| Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 75 |
| Rear reflector on motorcycle missing |1.4.1| | 56 |
| Horn not working |1.7.3a| | 49 |
| Rear Stop lamp not working (4.3.1 (a) (ii)) | 48 |
| Front Stop lamp not working (4.3.1 (a) (ii)) | 40 |
| Front Roller brake test indicates a binding brake |3.3.A1a| | 35 |
| Offside Front Shock absorber has a serious fluid leak (5.3.2 (b)) | 35 |
| Drive chain worn to excess |6.2.1e| | 34 |
| Front Brake lever has inadequate reserve travel |3.1.3b| | 30 |
| Drive chain excessively tight |6.2.1d| | 29 |
| Headlamp at least one does not illuminate on dipped beam |1.2.2a|i|| | 28 |
| Rear reflector missing (4.8.2 (a) (ii)) | 27 |
| Nearside Handlebar handgrip not secure to handlebars. |2.1.1c| | 26 |
| Nearside Front shock absorber seal failed and leaking oil |2.3.3| | 26 |
| Exhaust is leaking and excessively noisey |7.1.1b| | 23 |
| Nearside Front Shock absorber has a serious fluid leak (5.3.2 (b)) | 22 |
| Drive chain excessively loose (6.1.7 (c) (i)) | 21 |
| Stop lamp not working (4.3.1 (a) (ii)) | 18 |
| Offside Front shock absorber seal failed and leaking oil |2.3.3| | 18 |
| Stop lamp remains on when the brakes are released | 18 |
| Front Brake excessively binding (1.2.1 (f)) | 18 |
| Wheel alignment incorrect which adversely affects the handling |2.5.1| | 17 |
| Front Brake indicates excessive fluctuation of brake effort (1.2.1 (e)) | 16 |
| Headlamp not working on dipped beam (4.1.1 (a) (ii)) | 16 |
| Front wheel bearings have excessive free play |2.3.5b| | 16 |
| Front Valve stem seriously damaged (5.2.3 (j)) | 15 |
| Front Shock absorber has a serious fluid leak (5.3.2 (b)) | 15 |
| Rear shock absorber has inadequate damping effect. |2.4.A.3b| | 15 |
| Horn not working (7.7 (a)) | 15 |
| Rear Valve stem seriously damaged (5.2.3 (j)) | 15 |
| Rear Rear reflector missing (4.8.2 (a) (ii)) | 15 |
| Drive chain excessively tight (6.1.7 (k) (i)) | 14 |
| Rear Roller brake test indicates a binding brake |3.3.A1a| | 14 |
| Front Stop lamp not working |4.3.1 |a| |ii|| | 13 |
| Rear Rear reflector on motorcycle missing |1.4.1| | 13 |
| Offside Front Direction indicator insecure |1.5.3b| | 12 |
| Stop lamp does not illuminate by the operation of both brake controls (4.3.2 (a) (iii)) | 12 |
| Headlamp at least one does not illuminate on main beam |1.2.2a|ii|| | 12 |
| Exhaust mounting does not fully support the exhaust system |7.1.1.c| | 12 |
| Rear Wheel alignment incorrect which adversely affects the handling |2.5.1| | 12 |
| Nearside Handlebar grip insecure to handlebar (2.2.1 (d) (ii)) | 12 |
| Rear Shock absorber has negligible damping effect (5.3.2 (b)) | 12 |
| Rear position lamp does not illuminate immediately when it is switched on |1.1.3a| | 12 |
| Rear Drive chain sprocket worn to excess |6.2.1e| | 11 |
| Rear reflector missing |4.8.2 |a| |ii|| | 10 |
| Rear Position lamp not working (4.2.1 (a)) | 10 |
| Front Wheel bearing rough when rotated (5.1.3 (b) (i)) | 10 |
| Rear Brake disc|s| excessively worn |3.2.A1l| | 10 |
| Front Roller brake test indicates excessive fluctuation of brake effort |3.3.A1d| | 10 |
| Exhaust has part of the system missing |7.1.1a| | 10 |
| Rear Drive chain excessively loose |6.2.1d| | 10 |
| Nearside Front Shock absorber has a serious fluid leak |5.3.2 |b|| | 10 |
| Direction indicators flashing more than 120 times per minute |1.5.1c| | 10 |
| Horn not working |7.7 |a| |ii|| | 10 |
| Offside Rear Direction indicator not working (4.4.1 (a) (ii)) | 10 |
| Nearside Rear Footrest missing |6.2.1a| | 9 |
| Exhaust excessively deteriorated |7.1.1a| | 9 |
| Throttle operating incorrectly |6.2.1f| | 9 |
| Nearside Front Handlebar grip insecure to handlebar (2.2.1 (d) (ii)) | 9 |
| Offside Front Shock absorber has a serious fluid leak |5.3.2 |b|| | 9 |
| Steering headbearing has excessive free play |2.2.2| | 9 |
| Horn not loud enough to be heard by another road user |1.7.3a| | 9 |
| Nearside Front Front shock absorber seal failed and leaking oil |2.3.3| | 8 |
| Front Stop lamp does not illuminate by the operation of both brake controls (4.3.2 (a) (iii)) | 8 |
| Headlamp not working on main beam (4.1.1 (a) (ii)) | 8 |
| Horn not working (7.7 (a) (ii)) | 8 |
| Front Brake lever has insufficient reserve travel (1.1.2 (a)) | 8 |
| Rear Wheel bearing has excessive play (5.1.3 (a) (i)) | 8 |
| Stop lamp remains on when the brake is released |1.3.1e| | 8 |
| Front position lamp does not illuminate immediately when switched on |1.1.3a| | 8 |
| Drive chain worn to excess (6.1.7 (c) (i)) | 8 |
| Rear Stop lamp not working |4.3.1 |a| |ii|| | 8 |
| Rear wheel bearings have excessive free play |2.4.A.2c| | 8 |
| Headlamp aim projected beam image obviously incorrect (4.1.2 (c)) | 8 |
| Rear position lamp adversely affected by the operation of another lamp |1.1.3b| | 8 |
| Stop lamp not working |4.3.1 |a| |ii|| | 8 |
| Rear Floor brake test indicates a binding brake |3.3.C2c| | 8 |
| Front Hydraulic brake control feels spongy |3.1.4a| | 8 |