| Most common failures | No# failures |
|---|
| Headlamp aim out of alignment | 226 |
| Drive chain excessively loose (6.1.7 (c) (i)) | 48 |
| Stop lamp remains on when the brakes are released | 47 |
| Headlamp not working on dipped beam (4.1.1 (a) (ii)) | 44 |
| Front Brake excessively binding (1.2.1 (f)) | 25 |
| Rear Stop lamp not working (4.3.1 (a) (ii)) | 24 |
| Drive chain worn to excess (6.1.7 (c) (i)) | 24 |
| Headlamp not working on dipped beam |4.1.1 |a| |ii|| | 23 |
| Drive chain excessively loose |6.1.7 |c| |i|| | 20 |
| Drive chain so loose it is likely to fail (6.1.7 (c) (ii)) | 18 |
| Rear Position lamp not working (4.2.1 (a)) | 17 |
| Rear Brake excessively binding (1.2.1 (f)) | 17 |
| Registration plate issues | 16 |
| Nearside Front Shock absorber has a serious fluid leak (5.3.2 (b)) | 16 |
| Drive chain worn to excess |6.1.7 |c| |i|| | 15 |
| Front Position lamp not working (4.2.1 (a)) | 14 |
| Exhaust has a major leak of exhaust gases (6.1.2 (a)) | 13 |
| Drive chain excessively loose |6.2.1d| | 12 |
| Drive chain horseshoe locking device incorrectly fitted (6.1.7 (j) (i)) | 12 |
| Steering headbearing excessively stiff or notchy (2.2.2 (f) (i)) | 12 |
| Front Brake excessively binding |1.2.1 |f|| | 11 |
| Wheel alignment incorrect which adversely affects the handling (2.4 (a)) | 11 |
| Drive chain so worn it is likely to fail (6.1.7 (c) (ii)) | 11 |
| Exhaust system insecure (6.1.2 (a)) | 10 |
| Rear Position lamp not working |4.2.1 |a|| | 9 |
| Steering headbearing has excessive wear or free play (2.2.2 (f) (i)) | 9 |
| Stop lamp not working (4.3.1 (a) (ii)) | 9 |
| Nearside Handlebar grip insecure to handlebar (2.2.1 (d) (ii)) | 9 |
| Drive chain excessively tight (6.1.7 (k) (i)) | 9 |
| Rear Brake excessively binding |1.2.1 |f|| | 8 |
| Rear Drive chain sprocket worn to excess (6.1.7 (c) (i)) | 8 |
| Headlamp not working on main beam (4.1.1 (a) (ii)) | 8 |
| Rear Brake pedal has insufficient reserve travel (1.1.2 (a)) | 8 |
| Headlamp insecure (4.1.1 (c)) | 8 |
| Rear Brake pedal not releasing correctly and functionality of brakes affected (1.1.2 (b) (ii)) | 8 |
| Offside Front Direction indicator not working (4.4.1 (a) (ii)) | 8 |
| Rear Stop lamp not working |4.3.1 |a| |ii|| | 7 |
| Nearside Front Shock absorber has a serious fluid leak |5.3.2 |b|| | 7 |
| Drive chain so loose it is likely to fail |6.1.7 |c| |ii|| | 7 |
| Offside Front Shock absorber has a serious fluid leak (5.3.2 (b)) | 7 |
| Registration plate lamp issues | 7 |
| Horn not working (7.7 (a)) | 7 |
| Exhaust has a major leak of exhaust gases |6.1.2 |a|| | 6 |
| Drive chain so worn it is likely to fail |6.1.7 |c| |ii|| | 6 |
| Rear Drive chain sprocket worn to excess |6.1.7 |c| |i|| | 6 |
| 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)) | 6 |
| Rear Wheel bearing has excessive play (5.1.3 (a) (i)) | 6 |
| Front Stop lamp not working (4.3.1 (a) (ii)) | 6 |
| Rear Drive chain worn to excess (6.1.7 (c) (i)) | 6 |
| Rear Drive chain excessively loose (6.1.7 (c) (i)) | 6 |
| Rear Drive chain so loose it is likely to fail |6.1.7 |c| |ii|| | 5 |
| Nearside Handlebar grip insecure to handlebar |2.2.1 |d| |ii|| | 5 |
| Headlamp insecure |4.1.1 |c|| | 5 |
| Front Headlamp not working on dipped beam |4.1.1 |a| |ii|| | 5 |
| Headlamp aim not tested |4.1.2 |b|| | 5 |
| Drive chain horseshoe locking device incorrectly fitted |6.1.7 |j| |i|| | 5 |
| Front Headlamp not working on dipped beam (4.1.1 (a) (ii)) | 5 |
| Brake pedal not releasing correctly and functionality of brakes affected (1.1.2 (b) (ii)) | 5 |
| Headlamp aim not tested (4.1.2 (b)) | 5 |
| Nearside Front Direction indicator not working (4.4.1 (a) (ii)) | 5 |
| Headlamp aim projected beam image obviously incorrect (4.1.2 (c)) | 5 |
| Handlebar excessively deformed |2.2.1 |c| |i|| | 4 |
| Front Brake indicates excessive fluctuation of brake effort |1.2.1 |e|| | 4 |
| Handlebar deformed to the extent that steering is affected |2.2.1 |c| |ii|| | 4 |
| Horn not working |7.7 |a| |ii|| | 4 |
| Headlamp not working on main beam |4.1.1 |a| |ii|| | 4 |
| Front Headlamp insecure (4.1.1 (c)) | 4 |
| Rear Wheel alignment incorrect which adversely affects the handling (2.4 (a)) | 4 |
| Rear reflector missing (4.8.2 (a) (ii)) | 4 |
| Rear Wheel spindle loose (5.2.1 (c) (i)) | 4 |
| Rear Brake lining(s) less than 1.0 mm thick (1.1.13 (a)) | 4 |
| Drive chain sprocket worn to excess (6.1.7 (c) (i)) | 4 |
| Nearside Front Direction indicator incorrect colour (4.4.3 (a)) | 4 |
| Headlamp at least one does not illuminate on dipped beam |1.2.2a|i|| | 3 |
| Rear Stop lamp remains on when the brake is released |1.3.1e| | 3 |
| Drive chain excessively tight |6.2.1d| | 3 |
| Steering headbearing excessively stiff or notchy |2.2.2 |f| |i|| | 3 |
| Drive chain worn to excess |6.2.1e| | 3 |
| Drive chain sprocket worn to excess |6.2.1e| | 3 |
| Headlamp aim so that beam "kick up" is not visible on the screen |4.1.2 |a|| | 3 |
| Drive chain excessively tight |6.1.7 |k| |i|| | 3 |
| Wheel alignment incorrect which adversely affects the steering |2.4 |a|| | 3 |
| Front Roller brake test indicates a binding brake |3.3.A1a| | 3 |
| Rear Brake pedal not releasing correctly and functionality of brakes affected |1.1.2 |b| |ii|| | 3 |
| Rear Drive chain sprocket so worn it is likely to fail |6.1.7 |c| |ii|| | 3 |
| Front Stop lamp not working |4.3.1 |a| |ii|| | 3 |
| Stop lamp not working |4.3.1 |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 |
| Central Front Headlamp not working on dipped beam (4.1.1 (a) (ii)) | 3 |
| Rear Suspension arm pin or bush excessively worn (5.3.4 (a) (i)) | 3 |
| Drive chain sprocket so worn it is likely to fail (6.1.7 (c) (ii)) | 3 |
| Headlamp aim so that beam "kick up" is not visible on the screen (4.1.2 (a)) | 3 |
| Rear Brake grabbing severely (1.2.1 (c)) | 3 |
| Front Steering headbearing has excessive wear or free play (2.2.2 (f) (i)) | 3 |
| Drive chain excessively tight, so that it is likely to fail (6.1.7 (k) (ii)) | 3 |
| Horn sound not in accordance with requirements (7.7 (c)) | 3 |
| Front Steering headbearing excessively stiff or notchy (2.2.2 (f) (i)) | 3 |