| Most common failures | No# failures |
|---|
| Headlamp aim out of alignment | 156 |
| Registration plate lamp issues | 45 |
| Registration plate issues | 45 |
| Rear reflector on motorcycle missing |1.4.1| | 30 |
| Front Roller brake test indicates excessive fluctuation of brake effort |3.3.A1d| | 27 |
| Drive chain excessively loose |6.2.1d| | 20 |
| Front Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 20 |
| Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 16 |
| Horn not working |1.7.3a| | 15 |
| Headlamp at least one does not illuminate on dipped beam |1.2.2a|i|| | 14 |
| Horn not working (7.7 (a) (ii)) | 11 |
| Stop lamp remains on when the brake is released |1.3.1e| | 11 |
| Nearside Front shock absorber seal failed and leaking oil |2.3.3| | 11 |
| Rear Roller brake test indicates a binding brake |3.3.A1a| | 11 |
| Stop lamp remains on when the brakes are released | 11 |
| Rear Stop lamp remains on when the brake is released |1.3.1e| | 11 |
| Rear Brake excessively binding (1.2.1 (f)) | 10 |
| Offside Front shock absorber seal failed and leaking oil |2.3.3| | 10 |
| Front Stop lamp not working (4.3.1 (a) (ii)) | 9 |
| Riders seat insecure |6.2.1a| | 9 |
| Rear reflector missing (4.8.2 (a) (ii)) | 8 |
| Front Stop lamp not working |4.3.1 |a| |ii|| | 8 |
| Rear Brake disc|s| friction surface contaminated by oil or grease |3.2.A1k| | 7 |
| Front Roller brake test indicates a binding brake |3.3.A1a| | 7 |
| Rear Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 6 |
| Drive chain excessively loose (6.1.7 (c) (i)) | 6 |
| Drive chain excessively tight |6.2.1d| | 5 |
| Headlamp not working on main beam (4.1.1 (a) (ii)) | 5 |
| Rear wheel bearings have excessive free play |2.4.A.2c| | 5 |
| Chain guard insecure |6.2.1c| | 4 |
| Stop lamp not working (4.3.1 (a) (ii)) | 4 |
| Rear Brake excessively binding |1.2.1 |f|| | 4 |
| Offside Front Headlamp not working on dipped beam (4.1.1 (a) (ii)) | 4 |
| Front Brake indicates excessive fluctuation of brake effort (1.2.1 (e)) | 4 |
| Nearside Front Shock absorber has a serious fluid leak (5.3.2 (b)) | 4 |
| Offside Front Shock absorber has a serious fluid leak (5.3.2 (b)) | 4 |
| Rear Rear reflector on motorcycle missing |1.4.1| | 4 |
| Rear Shock absorber has negligible damping effect (5.3.2 (b)) | 4 |
| Rear reflector missing |4.8.2 |a| |ii|| | 4 |
| Front position lamp does not illuminate immediately when switched on |1.1.3a| | 4 |
| Horn not working |7.7 |a| |ii|| | 4 |
| Rear Roller brake test indicates a sticking brake |3.3.A1a| | 4 |
| Front shock absorber seal failed and leaking oil |2.3.3| | 4 |
| Headlamp at least one does not illuminate on main beam |1.2.2a|ii|| | 4 |
| Rear Brake disc|s| cracked |3.2.A1g| | 4 |
| Front Brake indicates excessive fluctuation of brake effort |1.2.1 |e|| | 4 |
| Nearside Rear Direction indicator not working (4.4.1 (a) (ii)) | 3 |
| Rear Brake indicates excessive fluctuation of brake effort (1.2.1 (e)) | 3 |
| Offside Headlamp at least one does not illuminate on dipped beam |1.2.2a|i|| | 3 |
| Front Horn not working (7.7 (a) (ii)) | 3 |
| Front Brake excessively binding (1.2.1 (f)) | 3 |
| Rear position lamp does not illuminate immediately when it is switched on |1.1.3a| | 3 |
| Nearside Handlebar handgrip not secure to handlebars. |2.1.1c| | 3 |
| Exhaust markings indicating not for road use or similar wording |7.1.4| | 3 |
| Nearside Front Front shock absorber seal failed and leaking oil |2.3.3| | 3 |
| Rear Rear wheel bearings have excessive free play |2.4.A.2c| | 3 |
| Rear Stop lamp not working (4.3.1 (a) (ii)) | 3 |
| Rear Brake disc contaminated (1.1.14 (b)) | 3 |
| Front Shock absorber has a serious fluid leak (5.3.2 (b)) | 3 |
| Offside Front Direction indicators not working |1.5.1c| | 3 |
| Nearside Front Direction indicators not working |1.5.1c| | 3 |
| Offside Rear Footrest missing |6.2.1a| | 3 |
| Front Headlamp not working on dipped beam (4.1.1 (a) (ii)) | 3 |
| Riders seat insecure (6.2.5 (a) (ii)) | 3 |
| Horn not working (7.7 (a)) | 3 |
| Steering headbearing has excessive free play |2.2.2| | 3 |
| Offside Front Front shock absorber seal failed and leaking oil |2.3.3| | 3 |
| Rear Drive chain excessively loose |6.2.1d| | 3 |
| Offside Rear Direction indicators not working |1.5.1c| | 3 |
| Rear Floor brake test indicates a binding brake |3.3.C2c| | 3 |