| Most common failures | No# failures |
|---|
| Headlamp aim out of alignment | 35 |
| Headlamp not working on dipped beam (4.1.1 (a) (ii)) | 10 |
| Registration plate lamp issues | 8 |
| Drive chain excessively loose (6.1.7 (c) (i)) | 4 |
| Rear reflector missing |4.8.2 |a| |ii|| | 4 |
| Headlamp not working on dipped beam |4.1.1 |a| |ii|| | 3 |
| Rear Wheel bearing has excessive play (5.1.3 (a) (i)) | 2 |
| Stop lamp remains on when the brakes are released | 2 |
| Front Headlamp not working on dipped beam (4.1.1 (a) (ii)) | 2 |
| Rear Wheel bearing play so excessive it is likely to break up |5.1.3 |a| |ii|| | 2 |
| Registration plate issues | 2 |
| Rear Brake indicates excessive fluctuation of brake effort |1.2.1 |e|| | 2 |
| Rear Wheel spindle locking device missing (5.2.1 (d)) | 2 |
| Nearside Front Shock absorber has a serious fluid leak (5.3.2 (b)) | 2 |
| Horn not working |1.7.3a| | 2 |
| Rear Stop lamp not working (4.3.1 (a) (ii)) | 2 |
| Rear Wheel bearing has excessive play |5.1.3 |a| |i|| | 2 |
| Rear Drive chain excessively loose (6.1.7 (c) (i)) | 2 |
| Front Wheel bearing has excessive play |5.1.3 |a| |i|| | 1 |
| Offside Front Shock absorber has a serious fluid leak (5.3.2 (b)) | 1 |
| Rear Valve stem seriously damaged (5.2.3 (j)) | 1 |
| Front Drive chain sprocket worn to excess (6.1.7 (c) (i)) | 1 |
| Front Stop lamp not working |4.3.1 |a| |ii|| | 1 |
| Rear Brake disc significantly and obviously worn |1.1.14 |a| |i|| | 1 |
| Central Rear Rear reflector on motorcycle missing |1.4.1| | 1 |
| Front Fairings so located that it is likely to impede the steering |2.1.2e| | 1 |
| Front Brake excessively binding (1.2.1 (f)) | 1 |
| Roller brake test The less effective brake control does not achieve an efficiency of 25% (1.2.2 (a) (i)) | 1 |
| Offside Rear All direction indicators not working |4.4.1 |a| |ii|| | 1 |
| Front Position lamp not working (4.2.1 (a)) | 1 |
| Wheel alignment incorrect which adversely affects the steering (2.4 (a)) | 1 |
| Nearside Handlebar grip insecure to handlebar (2.2.1 (d) (ii)) | 1 |
| Drive chain horseshoe locking device likely to become detached horseshoe clip missing (6.1.7 (j) (ii)) | 1 |
| Nearside Front Direction indicator not working (4.4.1 (a) (ii)) | 1 |
| Handlebar fouling on the fuel tank or bodywork on full lock right lock restricted |2.1.4 |b|| | 1 |
| Rear reflector missing (4.8.2 (a) (ii)) | 1 |
| Steering operation fouling on the fuel tank or bodywork on full lock (2.1.4 (b)) | 1 |
| Front Stop lamp not working (4.3.1 (a) (ii)) | 1 |
| Front Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 1 |
| Rear Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 1 |
| Central Front Headlamp not working on dipped beam (4.1.1 (a) (ii)) | 1 |
| Rear position lamp does not illuminate immediately when it is switched on |1.1.3a| | 1 |
| Nearside Front Position lamp not working (4.2.1 (a)) | 1 |
| Central Rear Upper Rear reflector missing (4.8.2 (a) (ii)) | 1 |
| Stop lamp not working (4.3.1 (a) (ii)) | 1 |
| Nearside Handlebar mounting insecure |2.2.1 |a| |i|| | 1 |
| Offside Front Direction indicator not working (4.4.1 (a) (ii)) | 1 |
| Offside Front Direction indicator likely to become detached (4.4.1 (c) (ii)) | 1 |
| Drive chain worn to excess (6.1.7 (c) (i)) | 1 |
| Front Wheel bearing rough when rotated (5.1.3 (b) (i)) | 1 |
| Offside Rear Brake disc contaminated |1.1.14 |b|| | 1 |
| Rear Brake disc contaminated |1.1.14 |b|| | 1 |
| Rear Brake excessively binding (1.2.1 (f)) | 1 |
| Throttle operating incorrectly |6.2.7 |a| |i|| | 1 |
| Horn not working (7.7 (a)) | 1 |
| Wheel alignment incorrect which adversely affects the steering |2.5.1| | 1 |
| Offside Front Brake disc contaminated |1.1.14 |b|| | 1 |
| Front Wheel bearing so rough it is likely to overheat or break up (5.1.3 (b) (ii)) | 1 |
| Headlamp aim so that beam "kick up" is not visible on the screen (4.1.2 (a)) | 1 |
| Wheel fixing missing |multiple fixings| |5.2.1 |a| |i|| | 1 |
| Drive chain excessively loose |6.1.7 |c| |i|| | 1 |
| Rear Stop lamp switch with a delay in operation control 2 (4.3.2 (a) (ii)) | 1 |
| Front Brake indicates excessive fluctuation of brake effort (1.2.1 (e)) | 1 |
| Direction indicator not working |4.4.1 |a| |ii|| | 1 |
| Exhaust has a major leak of exhaust gases |6.1.2 |a|| | 1 |
| Rear Suspension arm ball joint excessively worn |5.3.4 |a| |i|| | 1 |
| Offside Front Shock absorber has a serious fluid leak |5.3.2 |b|| | 1 |
| Nearside Shock absorber has a serious fluid leak (5.3.2 (b)) | 1 |
| Nearside Handlebar grip insecure to handlebar |2.2.1 |d| |ii|| | 1 |
| Offside Handlebar grip insecure to handlebar |2.2.1 |d| |ii|| | 1 |
| Nearside Front Wheel bearing has excessive play (5.1.3 (a) (i)) | 1 |
| Drive chain excessively tight (6.1.7 (k) (i)) | 1 |
| Steering operation restricted in free movement from lock to lock (2.1.4 (c)) | 1 |