| Most common failures | No# failures |
|---|
| Headlamp not working on dipped beam (4.1.1 (a) (ii)) | 84 |
| Headlamp aim out of alignment | 51 |
| Rear reflector missing (4.8.2 (a) (ii)) | 45 |
| Registration plate lamp issues | 45 |
| Headlamp not working on main beam (4.1.1 (a) (ii)) | 40 |
| Rear Brake lever has insufficient reserve travel (1.1.2 (a)) | 31 |
| Horn not working (7.7 (a) (ii)) | 23 |
| Roller brake test The less effective brake control does not achieve an efficiency of 25% (1.2.2 (a) (i)) | 21 |
| Headlamp aim not tested (4.1.2 (b)) | 19 |
| Stop lamp remains on when the brakes are released | 18 |
| Headlamp not working on dipped beam |4.1.1 |a| |ii|| | 17 |
| Registration plate issues | 17 |
| Headlamp aim projected beam image obviously incorrect (4.1.2 (c)) | 14 |
| Horn not working (7.7 (a)) | 13 |
| Nearside Rear Direction indicator not working (4.4.1 (a) (ii)) | 11 |
| Front Stop lamp not working (4.3.1 (a) (ii)) | 10 |
| Offside Rear Direction indicator not working (4.4.1 (a) (ii)) | 10 |
| Front Headlamp not working on dipped beam (4.1.1 (a) (ii)) | 9 |
| Rear Brake effort inadequate at a wheel (1.2.1 (a) (i)) | 9 |
| Rear reflector missing |4.8.2 |a| |ii|| | 8 |
| Front Wheel bearing rough when rotated (5.1.3 (b) (i)) | 8 |
| Headlamp not working on main beam |4.1.1 |a| |ii|| | 8 |
| Front Brake excessively binding (1.2.1 (f)) | 8 |
| Exhaust has a major leak of exhaust gases (6.1.2 (a)) | 7 |
| Rear Rear reflector missing (4.8.2 (a) (ii)) | 7 |
| Horn not working |7.7 |a| |ii|| | 7 |
| Steering headbearing has excessive wear or free play (2.2.2 (f) (i)) | 6 |
| Front Brake master cylinder leaking (1.1.10 (b) (ii)) | 6 |
| Rear Brake lever has insufficient reserve travel |1.1.2 |a|| | 5 |
| All direction indicators not working (4.4.1 (a) (ii)) | 5 |
| Front Position lamp not working (4.2.1 (a)) | 5 |
| Headlamp aim so that beam "kick up" is not visible on the screen (4.1.2 (a)) | 5 |
| Rear Brake lever has abnormal movement of levers indicating excessive wear or maladjustment (1.1.15 (f)) | 4 |
| Front Headlamp not working on main beam (4.1.1 (a) (ii)) | 4 |
| Nearside Handlebar grip insecure to handlebar (2.2.1 (d) (ii)) | 4 |
| Rear Brake lagging in operation (1.2.1 (d)) | 4 |
| Rear Position lamp not working (4.2.1 (a)) | 4 |
| Nearside Front Direction indicator not working (4.4.1 (a) (ii)) | 4 |
| Dipswitch does not operate immediately when selected on dipped beam (4.1.3 (b)) | 4 |
| Front Shock absorber has negligible damping effect (5.3.2 (b)) | 4 |
| Stop lamp does not illuminate by the operation of both brake controls (4.3.2 (a) (iii)) | 3 |
| Central Front Headlamp not working on dipped beam (4.1.1 (a) (ii)) | 3 |
| Rear Valve stem seriously damaged (5.2.3 (j)) | 3 |
| Central Front Headlamp not working on main beam (4.1.1 (a) (ii)) | 3 |
| Rear Exhaust has a major leak of exhaust gases (6.1.2 (a)) | 3 |
| Rear Brake effort inadequate at a wheel |1.2.1 |a| |i|| | 3 |
| Rear Brake excessively binding (1.2.1 (f)) | 3 |
| Front Valve stem seriously damaged (5.2.3 (j)) | 3 |
| Rear Brake indicates excessive fluctuation of brake effort (1.2.1 (e)) | 3 |
| Headlamp not working on dipped beam (4.1.1 (a) (ii)) | 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)) | 2 |
| Front Brake fluid not visible (1.1.10 (d) (iii)) | 2 |
| Front Brake lever has insufficient reserve travel (1.1.2 (a)) | 2 |
| Rear Shock absorber has negligible damping effect (5.3.2 (b)) | 2 |
| Nearside Brake lever has insufficient reserve travel (1.1.2 (a)) | 2 |
| Handlebar grip insecure to handlebar (2.2.1 (d) (ii)) | 2 |
| Front Headlamp not working on dipped beam |4.1.1 |a| |ii|| | 2 |
| Headlamp reflector seriously defective (4.1.1 (b) (ii)) | 2 |
| Handlebar mounting insecure (2.2.1 (a) (i)) | 2 |
| Rear Brake has no recorded effort at a wheel (1.2.1 (a) (ii)) | 2 |
| Rear Stop lamp does not illuminate by the operation of both brake controls (4.3.2 (a) (iii)) | 2 |
| Steering headbearing has excessive wear or free play |2.2.2 |f| |i|| | 2 |
| Front Brake master cylinder leaking |1.1.10 |b| |ii|| | 2 |
| Offside Front Direction indicator not working (4.4.1 (a) (ii)) | 2 |
| Handlebar so insecure it is likely to become detached (2.2.1 (b) (ii)) | 2 |
| Headlamp insecure (4.1.1 (c)) | 2 |
| Rear Brake lever insecure (1.1.2 (e) (i)) | 2 |
| Rear Stop lamp not working (4.3.1 (a) (ii)) | 2 |
| Throttle control functioning such that safe operation of the motorcycle is adversely affected |6.2.7 |a| |ii|| | 2 |
| Front Brake lagging in operation (1.2.1 (d)) | 2 |
| Front Stop lamp not working |4.3.1 |a| |ii|| | 2 |
| Offside Rear Shock absorber has a serious fluid leak (5.3.2 (b)) | 2 |
| Exhaust has a major leak of exhaust gases |6.1.2 |a|| | 2 |
| Nearside Handlebar grip insecure to handlebar |2.2.1 |d| |ii|| | 2 |
| Nearside Rear Direction indicator missing (4.4.1 (a) (ii)) | 2 |
| Handlebar mounting so insecure that steering is adversely affected (2.2.1 (a) (ii)) | 2 |
| Rear Brake lever not releasing correctly and functionality of brakes affected (1.1.2 (b) (ii)) | 2 |
| Central Front Headlamp aim projected beam image obviously incorrect (4.1.2 (c)) | 2 |