| Most common failures | No# failures |
|---|
| Headlamp aim out of alignment | 81 |
| Registration plate issues | 48 |
| Rear reflector on motorcycle missing |1.4.1| | 32 |
| Registration plate lamp issues | 31 |
| Front Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 27 |
| Rear reflector missing (4.8.2 (a) (ii)) | 22 |
| Drive chain excessively loose |6.2.1d| | 21 |
| Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 12 |
| Front Stop lamp not working (4.3.1 (a) (ii)) | 12 |
| Headlamp at least one does not illuminate on dipped beam |1.2.2a|i|| | 11 |
| Rear Valve stem seriously damaged (5.2.3 (j)) | 10 |
| Rear reflector missing |4.8.2 |a| |ii|| | 9 |
| Drive chain worn to excess |6.2.1e| | 9 |
| Rear Drive chain sprocket worn to excess |6.2.1e| | 8 |
| Nearside Front Shock absorber has a serious fluid leak (5.3.2 (b)) | 8 |
| Offside Front Shock absorber has a serious fluid leak (5.3.2 (b)) | 7 |
| Rear position lamp does not illuminate immediately when it is switched on |1.1.3a| | 6 |
| Drive chain excessively tight |6.2.1d| | 6 |
| Rear Roller brake test indicates excessive fluctuation of brake effort |3.3.A1d| | 6 |
| Front Position lamp not working (4.2.1 (a)) | 6 |
| Front Roller brake test indicates a binding brake |3.3.A1a| | 5 |
| Handlebar deformed |2.1.1b| | 5 |
| Rear Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 5 |
| Nearside Handlebar handgrip not secure to handlebars. |2.1.1c| | 5 |
| Nearside Front shock absorber seal failed and leaking oil |2.3.3| | 5 |
| Front position lamp does not illuminate immediately when switched on |1.1.3a| | 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)) | 5 |
| Drive chain excessively loose (6.1.7 (c) (i)) | 5 |
| Stop lamp not working (4.3.1 (a) (ii)) | 5 |
| Front Stop lamp not working |4.3.1 |a| |ii|| | 4 |
| Front Drive chain sprocket worn to excess |6.2.1e| | 4 |
| Front Position lamp not working |4.2.1 |a|| | 4 |
| Front shock absorber seal failed and leaking oil |2.3.3| | 4 |
| Locking device|s| not correctly fitted which may make the motor bicycle dangerous to ride |6.2.1h| | 4 |
| Front Valve stem seriously damaged (5.2.3 (j)) | 4 |
| Rear Roller brake test indicates a binding brake |3.3.A1a| | 3 |
| Rear Drive chain excessively loose |6.2.1d| | 3 |
| Wheel alignment incorrect which adversely affects the handling |2.5.1| | 3 |
| Headlamp aim beam image kick up to the offside |1.6| | 3 |
| Drive chain so loose it is likely to fail |6.1.7 |c| |ii|| | 3 |
| Front Front wheel bearings have excessive free play |2.3.5b| | 3 |
| Exhaust noise is clearly in excess of that emitted by a similar motor bicycle fitted with a standard silencer in average condition |7.1.2| | 3 |
| Horn not working |1.7.3a| | 3 |
| Offside Front shock absorber seal failed and leaking oil |2.3.3| | 3 |
| Headlamp aim so that beam "kick up" is not visible on the screen (4.1.2 (a)) | 3 |
| Exhaust noise is clearly in excess of that emitted by a similar motorcycle fitted with a standard silencer in average condition (8.1.1 (a)) | 3 |
| Drive chain so loose it is likely to fail (6.1.7 (c) (ii)) | 3 |
| Rear Shock absorber has negligible damping effect (5.3.2 (b)) | 3 |
| Rear Brake excessively binding (1.2.1 (f)) | 3 |
| Rear Rear reflector missing (4.8.2 (a) (ii)) | 3 |
| Rear Position lamp not working (4.2.1 (a)) | 3 |
| Headlamp not working on main beam (4.1.1 (a) (ii)) | 3 |
| Front Headlamp at least one does not illuminate on dipped beam |1.2.2a|i|| | 2 |
| Offside Rear Direction indicator not working |1.5.1c| | 2 |
| Front Stop lamp deteriorated and function impaired |1.3.3a| | 2 |
| Offside Front Direction indicator insecure |1.5.3b| | 2 |
| Front Valve stem seriously damaged |5.2.3 |j|| | 2 |
| Steering control has Insufficient clearance at full lock affecting the riders grasp of handlebars |2.1.2b| | 2 |
| Headlamp not working on dipped beam |4.1.1 |a| |ii|| | 2 |
| Nearside Front Shock absorber has a serious fluid leak |5.3.2 |b|| | 2 |
| Front Direction indicators not working |1.5.1c| | 2 |
| Rear Stop lamp not working |4.3.1 |a| |ii|| | 2 |
| Wheel alignment incorrect which adversely affects the steering |2.5.1| | 2 |
| Front Front position lamp does not illuminate immediately when switched on |1.1.3a| | 2 |
| Chain guard insecure |6.2.1c| | 2 |
| Handlebar mounting clamp bolt loose |2.1.1a| | 2 |
| Rear Rear reflector on motorcycle missing |1.4.1| | 2 |
| Exhaust has a major leak of exhaust gases (6.1.2 (a)) | 2 |
| Throttle operating incorrectly (6.2.7 (a) (i)) | 2 |
| Front Brake disc contaminated (1.1.14 (b)) | 2 |
| Nearside Front Brake disc contaminated (1.1.14 (b)) | 2 |
| Offside Front Brake disc contaminated (1.1.14 (b)) | 2 |
| Front Brake excessively binding (1.2.1 (f)) | 2 |
| All direction indicators not working (4.4.1 (a) (ii)) | 2 |
| Headlamp insecure (4.1.1 (c)) | 2 |
| Position lamp not working (4.2.1 (a)) | 2 |
| Horn not working (7.7 (a)) | 2 |