| Most common failures | No# failures |
|---|
| Headlamp aim out of alignment | 44 |
| Registration plate issues | 34 |
| Registration plate lamp issues | 24 |
| Rear reflector on motorcycle missing |1.4.1| | 17 |
| Drive chain excessively loose |6.2.1d| | 17 |
| Rear reflector missing (4.8.2 (a) (ii)) | 13 |
| Front Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 11 |
| Front Position lamp not working (4.2.1 (a)) | 10 |
| Drive chain excessively loose (6.1.7 (c) (i)) | 9 |
| Rear Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 8 |
| Front position lamp does not illuminate immediately when switched on |1.1.3a| | 8 |
| Drive chain worn to excess |6.2.1e| | 7 |
| Front Stop lamp not working (4.3.1 (a) (ii)) | 7 |
| Headlamp at least one does not illuminate on dipped beam |1.2.2a|i|| | 6 |
| Headlamp not working on dipped beam (4.1.1 (a) (ii)) | 6 |
| Offside Front Shock absorber has a serious fluid leak (5.3.2 (b)) | 6 |
| Front Valve stem seriously damaged (5.2.3 (j)) | 6 |
| Nearside Front shock absorber seal failed and leaking oil |2.3.3| | 5 |
| Rear reflector missing |4.8.2 |a| |ii|| | 5 |
| Front Brake excessively binding (1.2.1 (f)) | 5 |
| Rear Brake indicates excessive fluctuation of brake effort (1.2.1 (e)) | 5 |
| Nearside Front Shock absorber has a serious fluid leak (5.3.2 (b)) | 5 |
| Rear Rear reflector on motorcycle missing |1.4.1| | 4 |
| Rear Roller brake test indicates excessive fluctuation of brake effort |3.3.A1d| | 4 |
| Headlamp not working on dipped beam |4.1.1 |a| |ii|| | 4 |
| Drive chain excessively loose |6.1.7 |c| |i|| | 4 |
| Front Brake excessively binding |1.2.1 |f|| | 4 |
| Front Wheel bearing has excessive play (5.1.3 (a) (i)) | 4 |
| Front Roller brake test indicates a binding brake |3.3.A1a| | 3 |
| Front Valve stem seriously damaged |5.2.3 |j|| | 3 |
| Front Stop lamp not working |4.3.1 |a| |ii|| | 3 |
| Drive chain excessively tight |6.2.1d| | 3 |
| Rear Brake disc|s| has excessive run out |3.2.A1m| | 3 |
| Offside Rear Footrest missing |6.2.1a| | 3 |
| Front Headlamp at least one does not illuminate on main beam |1.2.2a|ii|| | 3 |
| Horn not working |1.7.3a| | 3 |
| Rear Valve stem seriously damaged |5.2.3 |j|| | 3 |
| Front Wheel bearing rough when rotated (5.1.3 (b) (i)) | 3 |
| Rear Valve stem seriously damaged (5.2.3 (j)) | 3 |
| Front Shock absorber has a serious fluid leak (5.3.2 (b)) | 3 |
| Rear Position lamp not working (4.2.1 (a)) | 3 |
| Drive chain worn to excess (6.1.7 (c) (i)) | 3 |
| Drive chain so loose it is likely to fail (6.1.7 (c) (ii)) | 3 |
| Rear position lamp does not illuminate immediately when it is switched on |1.1.3a| | 2 |
| Headlamp aim not tested |1.6| | 2 |
| Front shock absorber seal failed and leaking oil |2.3.3| | 2 |
| Drive chain worn to excess |6.1.7 |c| |i|| | 2 |
| 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| | 2 |
| Front Floor brake test indicates a binding brake |3.3.C2c| | 2 |
| Throttle operating incorrectly |6.2.1f| | 2 |
| Front Stop lamp switch with a delay in operation |4.3.2 |a| |ii|| | 2 |
| Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 2 |
| Nearside Handlebar grip insecure to handlebar |2.2.1 |d| |ii|| | 2 |
| Offside Handlebar handgrip not secure to handlebars. |2.1.1c| | 2 |
| Rear shock absorber has inadequate damping effect. |2.4.A.3b| | 2 |
| Front Position lamp not working |4.2.1 |a|| | 2 |
| Stop lamp not working |4.3.1 |a| |ii|| | 2 |
| Rear Brake indicates excessive fluctuation of brake effort |1.2.1 |e|| | 2 |
| Handlebar deformed |2.1.1b| | 2 |
| Offside Front Locking devices not correctly fitted which may make the motor bicycle dangerous to ride r/h front engine mount missing |6.2.1h| | 2 |
| Rear Roller brake test indicates a binding brake |3.3.A1a| | 2 |
| Nearside Handlebar handgrip not secure to handlebars. |2.1.1c| | 2 |
| Headlamp aim not tested |4.1.2 |b|| | 2 |
| Rear Rear reflector missing (4.8.2 (a) (ii)) | 2 |
| Drive chain so worn it is likely to fail (6.1.7 (c) (ii)) | 2 |
| Offside Front Direction indicator not working (4.4.1 (a) (ii)) | 2 |
| Rear Stop lamp not working (4.3.1 (a) (ii)) | 2 |
| 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)) | 2 |
| Steering operation fouling on the fuel tank or bodywork on full lock (2.1.4 (b)) | 2 |
| Throttle control functioning such that safe operation of the motorcycle is adversely affected (6.2.7 (a) (ii)) | 2 |
| Nearside Handlebar grip insecure to handlebar (2.2.1 (d) (ii)) | 2 |
| Front Stop lamp switch with a delay in operation (4.3.2 (a) (ii)) | 2 |
| Front Inner Brake disc contaminated (1.1.14 (b)) | 2 |