| Most common failures | No# failures |
|---|
| Headlamp aim out of alignment | 184 |
| Registration plate lamp issues | 88 |
| Horn not working |1.7.3a| | 40 |
| Drive chain excessively loose |6.2.1d| | 33 |
| Registration plate issues | 25 |
| Headlamp at least one does not illuminate on dipped beam |1.2.2a|i|| | 24 |
| Horn not working (7.7 (a)) | 18 |
| Rear Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 17 |
| Headlamp not working on dipped beam (4.1.1 (a) (ii)) | 16 |
| Front Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 16 |
| Horn not working (7.7 (a) (ii)) | 13 |
| Nearside Front Shock absorber has a serious fluid leak (5.3.2 (b)) | 13 |
| Drive chain worn to excess |6.2.1e| | 13 |
| Rear reflector on motorcycle missing |1.4.1| | 13 |
| Front Roller brake test indicates excessive fluctuation of brake effort |3.3.A1d| | 13 |
| Drive chain excessively loose (6.1.7 (c) (i)) | 12 |
| Drive chain excessively tight |6.2.1d| | 11 |
| Nearside Front shock absorber seal failed and leaking oil |2.3.3| | 10 |
| Front Brake excessively binding (1.2.1 (f)) | 10 |
| Horn not working |7.7 |a| |ii|| | 8 |
| Nearside Handlebar handgrip not secure to handlebars. |2.1.1c| | 8 |
| Nearside Front Direction indicator likely to become detached (4.4.1 (c) (ii)) | 8 |
| Exhaust is leaking and excessively noisey |7.1.1b| | 8 |
| Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 8 |
| Rear reflector missing (4.8.2 (a) (ii)) | 7 |
| Front Horn not working |1.7.3a| | 7 |
| Front Valve stem seriously damaged (5.2.3 (j)) | 7 |
| Front Roller brake test indicates a binding brake |3.3.A1a| | 7 |
| Throttle operating incorrectly |6.2.1f| | 7 |
| Nearside Front Footrest insecure |6.2.1a| | 7 |
| Rear position lamp does not illuminate immediately when it is switched on |1.1.3a| | 6 |
| Headlamp not working on main beam (4.1.1 (a) (ii)) | 6 |
| Offside Front Shock absorber has a serious fluid leak (5.3.2 (b)) | 6 |
| Steering headbearing excessively stiff or notchy (2.2.2 (f) (i)) | 6 |
| Rear Brake excessively binding (1.2.1 (f)) | 6 |
| Rear wheel bearings have excessive free play |2.4.A.2c| | 6 |
| Offside Front Direction indicator likely to become detached (4.4.1 (c) (ii)) | 6 |
| Rear Roller brake test indicates a binding brake |3.3.A1a| | 6 |
| Front Stop lamp not working (4.3.1 (a) (ii)) | 5 |
| Rear wheel spindle securing nut locking device missing |2.4.A.2b| | 5 |
| Drive chain excessively loose |6.1.7 |c| |i|| | 5 |
| Nearside Front Front shock absorber seal failed and leaking oil |2.3.3| | 5 |
| Rear Stop lamp not working (4.3.1 (a) (ii)) | 5 |
| Offside Handlebar handgrip not secure to handlebars. |2.1.1c| | 4 |
| Front Headlamp not working on dipped beam (4.1.1 (a) (ii)) | 4 |
| Front Wheel bearing has excessive play (5.1.3 (a) (i)) | 4 |
| Front Brake indicates excessive fluctuation of brake effort (1.2.1 (e)) | 4 |
| Offside Front shock absorber seal failed and leaking oil |2.3.3| | 4 |
| Horn not loud enough to be heard by another road user |1.7.3a| | 4 |
| Drive chain so loose it is likely to fail (6.1.7 (c) (ii)) | 4 |
| Rear Position lamp not working (4.2.1 (a)) | 4 |
| Headlamp aim unable to be tested (4.1.2 (b)) | 4 |
| Drive chain horseshoe locking device incorrectly fitted (6.1.7 (j) (i)) | 4 |
| Steering movement excessively `notchy` with the weight on the lower bearing |2.2.1a| | 4 |
| Rear Rear reflector missing (4.8.2 (a) (ii)) | 4 |
| Rear Drive chain sprocket worn to excess |6.2.1e| | 4 |
| Front Brake disc|s| has excessive run out |3.2.A1m| | 4 |
| Headlamp at least one does not illuminate on main beam |1.2.2a|ii|| | 4 |
| Wheel alignment incorrect which adversely affects the handling |2.5.1| | 4 |
| Front Headlamp not working on main beam (4.1.1 (a) (ii)) | 3 |
| Front position lamp incorrect colour |1.1.2a| | 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 |
| Rear Stop lamp switch with a delay in operation (4.3.2 (a) (ii)) | 3 |
| Throttle has a significant change in engine speed whilst moving the steering from lock to lock |2.1.4| | 3 |
| Horn sound not in accordance with requirements (7.7 (c)) | 3 |
| Offside Rear Direction indicator not working (4.4.1 (a) (ii)) | 3 |
| Exhaust has a major leak of exhaust gases (6.1.2 (a)) | 3 |
| Front position lamp does not illuminate immediately when switched on |1.1.3a| | 3 |
| Front Brake lever has inadequate reserve travel |3.1.3b| | 3 |
| Offside Front Front shock absorber seal failed and leaking oil |2.3.3| | 3 |
| Rear Valve stem seriously damaged (5.2.3 (j)) | 3 |
| Front Floor brake test indicates a binding brake |3.3.C2c| | 3 |
| Rear Wheel bearing has excessive play (5.1.3 (a) (i)) | 3 |
| Rear Drive chain excessively loose |6.2.1d| | 3 |
| Rear Drive chain worn to excess |6.2.1e| | 3 |
| Headlamp not working on dipped beam |4.1.1 |a| |ii|| | 3 |
| Offside Front Direction indicator not working |1.5.1c| | 3 |
| Throttle operating incorrectly (6.2.7 (a) (i)) | 3 |
| Front shock absorber seal failed and leaking oil |2.3.3| | 3 |