| Most common failures | No# failures |
|---|
| Headlamp aim out of alignment | 132 |
| Front Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 59 |
| Front Roller brake test indicates a binding brake |3.3.A1a| | 55 |
| Registration plate issues | 32 |
| Drive chain excessively loose |6.2.1d| | 24 |
| Horn not working |1.7.3a| | 24 |
| Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 20 |
| Front Floor brake test indicates a binding brake |3.3.C2c| | 20 |
| Rear Roller brake test indicates a binding brake |3.3.A1a| | 19 |
| Front position lamp does not illuminate immediately when switched on |1.1.3a| | 18 |
| Rear reflector on motorcycle missing |1.4.1| | 18 |
| Rear Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 15 |
| Throttle operating incorrectly |6.2.1f| | 13 |
| Steering movement excessively `notchy` with the wheel raised |2.2.1b| | 13 |
| Drive chain excessively tight |6.2.1d| | 12 |
| Front Brake lever has inadequate reserve travel |3.1.3b| | 12 |
| Headlamp at least one does not illuminate on dipped beam |1.2.2a|i|| | 10 |
| Offside Front shock absorber seal failed and leaking oil |2.3.3| | 10 |
| Front Stop lamp not working (4.3.1 (a) (ii)) | 10 |
| Front wheel bearings have excessive free play |2.3.5b| | 9 |
| Rear Roller brake test indicates excessive fluctuation of brake effort |3.3.A1d| | 9 |
| Rear wheel bearings have excessive free play |2.4.A.2c| | 8 |
| Nearside Front shock absorber seal failed and leaking oil |2.3.3| | 8 |
| Offside Front Brake disc|s| friction surface contaminated by oil or grease |3.2.A1k| | 7 |
| Drive chain worn to excess |6.2.1e| | 7 |
| Rear position lamp does not illuminate immediately when it is switched on |1.1.3a| | 7 |
| Roller brake test The less effective brake control does not achieve an efficiency of 25%. |3.3.A2b| | 6 |
| Front Brake excessively binding (1.2.1 (f)) | 6 |
| Offside Front Front shock absorber seal failed and leaking oil |2.3.3| | 5 |
| Rear shock absorber has inadequate damping effect. |2.4.A.3b| | 5 |
| Stop lamp remains on when the brake is released |1.3.1e| | 5 |
| Front Front wheel bearings have excessive free play |2.3.5b| | 5 |
| Front Roller brake test indicates a sticking brake |3.3.A1a| | 4 |
| Offside Handlebar handgrip not secure to handlebars. |2.1.1c| | 4 |
| Wheel alignment incorrect which adversely affects the handling |2.5.1| | 4 |
| Nearside Rear Direction indicators not working |1.5.1c| | 4 |
| Front wheel bearings are excessively rough |2.3.5b| | 4 |
| Steering movement excessively `notchy` with the weight on the lower bearing |2.2.1a| | 4 |
| Front Front shock absorber seal failed and leaking oil |2.3.3| | 4 |
| Front Stop lamp remains on when the brake is released |1.3.1e| | 4 |
| Rear Drive chain sprocket worn to excess |6.2.1e| | 4 |
| Throttle has a significant change in engine speed whilst moving the steering from lock to lock |2.1.4| | 4 |
| Front Front position lamp does not illuminate immediately when switched on |1.1.3a| | 4 |
| Rear wheel spindle securing nut locking device missing |2.4.A.2b| | 4 |
| Front position lamp incorrect colour |1.1.2a| | 4 |
| Front Stop lamp not working |4.3.1 |a| |ii|| | 4 |
| Nearside Front Shock absorber has a serious fluid leak (5.3.2 (b)) | 4 |
| Headlamp aim not tested (4.1.2 (b)) | 4 |
| Stop lamp not working (4.3.1 (a) (ii)) | 4 |
| Front Stop lamp does not illuminate by the operation of both brake controls (4.3.2 (a) (iii)) | 4 |
| Horn not working (7.7 (a)) | 4 |
| Nearside Front Brake disc|s| is excessively distorted |3.2.A1m| | 3 |
| Headlamp aim beam image kick up to the offside |1.6| | 3 |
| Roller brake test No brake control achieves an efficiency of 30%. |3.3.A2a| | 3 |
| Roller brake test Neither brake control achieves an efficiency of 25% |3.3.A2b| | 3 |
| Horn not working |7.7 |a| |ii|| | 3 |
| Brake lever has inadequate reserve travel |3.1.3b| | 3 |
| Rear Brake disc|s| excessively worn |3.2.A1l| | 3 |
| Front Brake excessively binding |1.2.1 |f|| | 3 |
| Rear Rear position lamp does not illuminate immediately when it is switched on |1.1.3a| | 3 |
| Nearside Front Front shock absorber seal failed and leaking oil |2.3.3| | 3 |
| Nearside Front Brake disc|s| friction surface contaminated by oil or grease |3.2.A1k| | 3 |
| Rear Floor brake test indicates a binding brake |3.3.C2c| | 3 |
| Front shock absorber seal failed and leaking oil |2.3.3| | 3 |
| Locking device|s| not correctly fitted which may make the motor bicycle dangerous to ride |6.2.1h| | 3 |
| Rear Brake disc|s| has excessive run out |3.2.A1m| | 3 |
| Steering movement excessively stiff with the wheel raised |2.2.1b| | 3 |
| Headlamp at least one does not illuminate on main beam |1.2.2a|ii|| | 3 |
| Nearside Front Direction indicator not working |1.5.1c| | 3 |
| Front Position lamp not working |4.2.1 |a|| | 3 |
| Drive chain excessively loose |6.1.7 |c| |i|| | 3 |
| Nearside Handlebar handgrip not secure to handlebars. |2.1.1c| | 3 |
| Front Roller brake test indicates excessive fluctuation of brake effort |3.3.A1d| | 3 |
| Rear position lamp adversely affected by the operation of another lamp |1.1.3b| | 3 |
| Locking devices not correctly fitted which may make the motor bicycle dangerous to ride |6.2.1h| | 3 |
| Rear Roller brake test indicates a sticking brake |3.3.A1a| | 3 |
| Front Brake lever has insufficient reserve travel (1.1.2 (a)) | 3 |
| Front Valve stem seriously damaged (5.2.3 (j)) | 3 |
| Headlamp not working on main beam (4.1.1 (a) (ii)) | 3 |
| Rear reflector missing (4.8.2 (a) (ii)) | 3 |
| Offside Front Shock absorber has a serious fluid leak (5.3.2 (b)) | 3 |
| Front Position lamp not working (4.2.1 (a)) | 3 |
| Offside Rear Footrest insecure (6.2.12 (a)) | 3 |
| Stop lamp does not illuminate by the operation of both brake controls (4.3.2 (a) (iii)) | 3 |