| Most common failures | No# failures |
|---|
| Headlamp aim out of alignment | 61 |
| Front Roller brake test indicates a binding brake |3.3.A1a| | 29 |
| Rear reflector on motorcycle missing |1.4.1| | 25 |
| Rear Roller brake test indicates a binding brake |3.3.A1a| | 23 |
| Front wheel bearings have excessive free play |2.3.5b| | 21 |
| Drive chain excessively loose |6.2.1d| | 21 |
| Front position lamp does not illuminate immediately when switched on |1.1.3a| | 20 |
| Rear wheel bearings have excessive free play |2.4.A.2c| | 18 |
| Exhaust is leaking and excessively noisey |7.1.1b| | 15 |
| Front Floor brake test indicates a binding brake |3.3.C2c| | 10 |
| Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 10 |
| Rear Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 9 |
| Drive chain worn to excess |6.2.1e| | 9 |
| Headlamp aim beam image kick up to the offside |1.6| | 8 |
| Front wheel bearings are excessively rough |2.3.5b| | 8 |
| Registration plate issues | 7 |
| Rear position lamp does not illuminate immediately when it is switched on |1.1.3a| | 6 |
| Nearside Front shock absorber seal failed and leaking oil |2.3.3| | 6 |
| Offside Front shock absorber seal failed and leaking oil |2.3.3| | 6 |
| Front Position lamp not working (4.2.1 (a)) | 6 |
| Nearside Front Shock absorber has a serious fluid leak (5.3.2 (b)) | 6 |
| Front Brake excessively binding (1.2.1 (f)) | 6 |
| Front Floor brake test indicates a sticking brake |3.3.C2c| | 5 |
| Steering movement excessively `notchy` with the wheel raised |2.2.1b| | 5 |
| Rear Drive chain sprocket worn to excess |6.2.1e| | 5 |
| Front Front wheel bearings have excessive free play |2.3.5b| | 5 |
| Front Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 5 |
| Nearside Front Front shock absorber seal failed and leaking oil |2.3.3| | 5 |
| Rear reflector missing (4.8.2 (a) (ii)) | 5 |
| Rear shock absorber has inadequate damping effect. |2.4.A.3b| | 4 |
| Drive chain excessively tight |6.2.1d| | 4 |
| Front Brake fluid reservoir fluid level dangerously low |3.2.B1d| | 4 |
| Horn not working |1.7.3a| | 4 |
| Roller brake test The less effective brake control does not achieve an efficiency of 25%. |3.3.A2b| | 4 |
| Rear Brake disc|s| excessively worn |3.2.A1l| | 4 |
| Front Roller brake test indicates a sticking brake |3.3.A1a| | 4 |
| Exhaust excessively deteriorated |7.1.1a| | 4 |
| Front Brake lever has inadequate reserve travel |3.1.3b| | 4 |
| Rear Exhaust is leaking and excessively noisey |7.1.1b| | 3 |
| Rear Floor brake test indicates a binding brake |3.3.C2c| | 3 |
| Drive chain sprocket worn to excess |6.2.1e| | 3 |
| Nearside Handlebar handgrip not secure to handlebars. |2.1.1c| | 3 |
| Front position lamp missing |1.1.1a| | 3 |
| Horn not loud enough to be heard by another road user |1.7.3a| | 3 |
| Front Roller brake test indicates excessive fluctuation of brake effort |3.3.A1d| | 3 |
| Rear Drive chain excessively loose |6.2.1d| | 3 |
| Steering headbearing has excessive free play |2.2.2| | 3 |
| Wheel alignment incorrect which adversely affects the handling |2.5.1| | 3 |
| Front shock absorber seal failed and leaking oil |2.3.3| | 3 |
| Rear Roller brake test indicates excessive fluctuation of brake effort |3.3.A1d| | 3 |
| Rear Rear position lamp does not illuminate immediately when it is switched on |1.1.3a| | 3 |
| Exhaust has a major leak of exhaust gases (6.1.2 (a)) | 3 |
| Headlamp aim beam image kick-up is to the offside |1.6.1| | 2 |
| Offside Front Direction indicator not working |4.4.1 |a| |ii|| | 2 |
| Rear Rear wheel bearings have excessive free play |2.4.A.2c| | 2 |
| Front Brake excessively binding |1.2.1 |f|| | 2 |
| Rear Drive chain worn to excess |6.2.1e| | 2 |
| Nearside Rear Drive chain excessively loose |6.2.1d| | 2 |
| Offside Rear Footrest insecure |6.2.1a| | 2 |
| Rear Wheel alignment incorrect which adversely affects the handling |2.5.1| | 2 |
| Locking device|s| not correctly fitted which may make the motor bicycle dangerous to ride |6.2.1h| | 2 |
| Offside Front Shock absorber has a serious fluid leak |5.3.2 |b|| | 2 |
| Front Headlamp at least one does not illuminate on dipped beam |1.2.2a|i|| | 2 |
| Centre Rear Rear reflector on motorcycle missing |1.4.1| | 2 |
| Nearside Front Shock absorber has a serious fluid leak |5.3.2 |b|| | 2 |
| Nearside Rear Direction indicator not working |1.5.1c| | 2 |
| Offside Front Front shock absorber seal failed and leaking oil |2.3.3| | 2 |
| Steering movement excessively `notchy` with the weight on the lower bearing |2.2.1a| | 2 |
| Headlamp at least one does not illuminate on dipped beam |1.2.2a|i|| | 2 |
| Rear wheel bearings are excessively rough |2.4.A.2c| | 2 |
| Stop lamp remains on when the brake is released |1.3.1e| | 2 |
| Nearside Exhaust is leaking and excessively noisey |7.1.1b| | 2 |
| Rear Floor brake test indicates a sticking brake |3.3.C2c| | 2 |
| Rear Valve stem seriously damaged (5.2.3 (j)) | 2 |
| Drive chain excessively tight (6.1.7 (k) (i)) | 2 |
| Offside Front Direction indicator not working (4.4.1 (a) (ii)) | 2 |
| Rear Position lamp not working (4.2.1 (a)) | 2 |
| Rear Brake excessively binding (1.2.1 (f)) | 2 |
| Front Valve stem seriously damaged (5.2.3 (j)) | 2 |
| Rear Stop lamp not working (4.3.1 (a) (ii)) | 2 |
| Front Wheel bearing rough when rotated (5.1.3 (b) (i)) | 2 |