| Most common failures | No# failures |
|---|
| Registration plate lamp issues | 75 |
| Steering headbearing has excessive wear or free play (2.2.2 (f) (i)) | 65 |
| Headlamp aim out of alignment | 51 |
| Headlamp not working on dipped beam (4.1.1 (a) (ii)) | 44 |
| Nearside Front Shock absorber has a serious fluid leak (5.3.2 (b)) | 37 |
| Rear Stop lamp not working (4.3.1 (a) (ii)) | 36 |
| Roller brake test The less effective brake control does not achieve an efficiency of 25% (1.2.2 (a) (i)) | 33 |
| Offside Front Shock absorber has a serious fluid leak (5.3.2 (b)) | 30 |
| Stop lamp remains on when the brakes are released | 28 |
| Exhaust has a major leak of exhaust gases (6.1.2 (a)) | 27 |
| Headlamp not working on main beam (4.1.1 (a) (ii)) | 22 |
| Headlamp aim not tested (4.1.2 (b)) | 20 |
| Rear Position lamp not working (4.2.1 (a)) | 19 |
| Rear reflector missing (4.8.2 (a) (ii)) | 19 |
| Horn not working (7.7 (a) (ii)) | 18 |
| Front Steering headbearing has excessive wear or free play (2.2.2 (f) (i)) | 16 |
| Rear Brake lever has insufficient reserve travel (1.1.2 (a)) | 16 |
| Front Stop lamp not working (4.3.1 (a) (ii)) | 16 |
| Rear Shock absorber has negligible damping effect (5.3.2 (b)) | 16 |
| Steering headbearing has excessive wear or free play |2.2.2 |f| |i|| | 14 |
| Front Shock absorber has a serious fluid leak (5.3.2 (b)) | 14 |
| Rear Valve stem seriously damaged (5.2.3 (j)) | 14 |
| Front Wheel bearing rough when rotated (5.1.3 (b) (i)) | 14 |
| Roller brake test The less effective brake control does not achieve an efficiency of 25% |1.2.2 |a| |i|| | 13 |
| Nearside Front Direction indicator not working (4.4.1 (a) (ii)) | 13 |
| Horn not working |7.7 |a| |ii|| | 12 |
| Horn not working (7.7 (a)) | 12 |
| Offside Front Direction indicator not working (4.4.1 (a) (ii)) | 11 |
| Steering headbearing excessively stiff or notchy (2.2.2 (f) (i)) | 11 |
| Rear Wheel bearing has excessive play (5.1.3 (a) (i)) | 10 |
| Front Brake indicates excessive fluctuation of brake effort (1.2.1 (e)) | 10 |
| Front Valve stem seriously damaged (5.2.3 (j)) | 10 |
| Rear Brake disc significantly and obviously worn (1.1.14 (a) (i)) | 9 |
| Stop lamp not working (4.3.1 (a) (ii)) | 9 |
| Rear Brake lever has insufficient reserve travel |1.1.2 |a|| | 8 |
| Rear Brake caliper insecurely mounted and braking performance affected (1.1.16 (c) (ii)) | 8 |
| Rear Brake effort inadequate at a wheel (1.2.1 (a) (i)) | 8 |
| Riders seat insecure (6.2.5 (a) (ii)) | 8 |
| Brake hose damaged | 8 |
| Stop lamp does not illuminate by the operation of both brake controls (4.3.2 (a) (iii)) | 8 |
| Wheel alignment incorrect which adversely affects the handling (2.4 (a)) | 8 |
| Front Shock absorber has negligible damping effect (5.3.2 (b)) | 7 |
| Headlamp not working on dipped beam |4.1.1 |a| |ii|| | 7 |
| Wheel alignment incorrect which adversely affects the steering (2.4 (a)) | 7 |
| Rear Rear reflector missing (4.8.2 (a) (ii)) | 7 |
| Nearside Rear Shock absorber has negligible damping effect (5.3.2 (b)) | 7 |
| Offside Rear Shock absorber has negligible damping effect (5.3.2 (b)) | 7 |
| Rear Brake caliper insecure (1.1.16 (c) (i)) | 7 |
| Rear Brake excessively binding (1.2.1 (f)) | 7 |
| Front Steering headbearing excessively stiff or notchy (2.2.2 (f) (i)) | 6 |
| Handlebar so insecure it is likely to become detached (2.2.1 (b) (ii)) | 6 |
| All direction indicators not working (4.4.1 (a) (ii)) | 6 |
| Brake performance not tested (1.2.1 (g)) | 6 |
| Front Position lamp not working (4.2.1 (a)) | 6 |
| Rear Wheel excessively distorted (5.2.2 (c) (i)) | 6 |
| Rear Stop lamp not working |4.3.1 |a| |ii|| | 6 |
| Nearside Front Shock absorber has a serious fluid leak |5.3.2 |b|| | 6 |
| Rear Brake indicates excessive fluctuation of brake effort (1.2.1 (e)) | 6 |
| Headlamp light intensity severely reduced (4.1.4 (a)) | 5 |
| Rear Brake has no recorded effort at a wheel (1.2.1 (a) (ii)) | 5 |
| Exhaust system insecure (6.1.2 (a)) | 5 |
| Front Headlamp not working on dipped beam (4.1.1 (a) (ii)) | 5 |
| Nearside Front Handlebar grip insecure to handlebar (2.2.1 (d) (ii)) | 5 |
| Rear Wheel spindle or securing nut(s) so insecure that wheel security or steering control is adversely affected (5.2.1 (c) (ii)) | 5 |
| Handlebar retaining device loose (2.2.1 (b) (i)) | 5 |
| Front Brake excessively binding (1.2.1 (f)) | 5 |
| Headlamp insecure (4.1.1 (c)) | 5 |
| Rear brake disc in such a condition that it is seriously weakened | 5 |
| Steering headbearing excessively stiff or notchy |2.2.2 |f| |i|| | 4 |
| Rear Brake disc significantly and obviously worn |1.1.14 |a| |i|| | 4 |
| Registration plate issues | 4 |
| Front Brake lever has insufficient reserve travel (1.1.2 (a)) | 4 |
| Stop lamp not working |4.3.1 |a| |ii|| | 4 |
| Floor brake test The less effective brake control does not achieve an efficiency of 25% (1.2.2 (a) (i)) | 4 |
| Brake hose excessively deteriorated | 4 |
| Front Stop lamp not working |4.3.1 |a| |ii|| | 4 |
| Rear Stop lamp does not illuminate by the operation of both brake controls (4.3.2 (a) (iii)) | 4 |
| Offside Front Shock absorber has a serious fluid leak |5.3.2 |b|| | 4 |
| Rear Shock absorber has negligible damping effect |5.3.2 |b|| | 4 |
| Nearside Front Headlamp not working on dipped beam (4.1.1 (a) (ii)) | 3 |
| Nearside Rear Stop lamp not working (4.3.1 (a) (ii)) | 3 |
| Rear Valve stem seriously damaged |5.2.3 |j|| | 3 |
| Nearside Headlamp light intensity severely reduced (4.1.4 (a)) | 3 |
| Headlamp not working on main beam |4.1.1 |a| |ii|| | 3 |
| Rear Brake grabbing severely (1.2.1 (c)) | 3 |
| Nearside Stop lamp does not illuminate by the operation of both brake controls (4.3.2 (a) (iii)) | 3 |
| Front Shock absorber has a serious fluid leak |5.3.2 |b|| | 3 |
| Horn not working |1.7.3a| | 3 |
| Dipswitch does not operate immediately when selected on dipped beam (4.1.3 (b)) | 3 |
| Steering operation restricted in free movement from lock to lock (2.1.4 (c)) | 3 |
| All direction indicators not working |4.4.1 |a| |ii|| | 3 |
| Steering headbearing has excessive free play |2.2.2| | 3 |
| Rear Brake lever has abnormal movement of levers indicating excessive wear or maladjustment (1.1.15 (f)) | 3 |
| Front Brake disc significantly and obviously worn (1.1.14 (a) (i)) | 3 |
| Front Wheel bearing so rough it is likely to overheat or break up (5.1.3 (b) (ii)) | 3 |
| Nearside Rear Direction indicator incorrect colour (4.4.3 (a)) | 3 |
| Front Steering headbearing has excessive wear or free play |2.2.2 |f| |i|| | 3 |
| Offside Front Position lamp not working (4.2.1 (a)) | 3 |
| Front Brake indicates excessive fluctuation of brake effort |1.2.1 |e|| | 3 |
| Rear Brake indicates excessive fluctuation of brake effort |1.2.1 |e|| | 3 |
| Front Exhaust has a major leak of exhaust gases (6.1.2 (a)) | 3 |
| Steering headbearing in such a condition that steering control is adversely affected (2.2.2 (f) (ii)) | 3 |
| Front All direction indicators not working (4.4.1 (a) (ii)) | 3 |
| Rear Wheel spindle or securing nut|s| so insecure that wheel security or steering control is adversely affected |5.2.1 |c| |ii|| | 3 |
| Rear Wheel bearing has excessive play |5.1.3 |a| |i|| | 3 |
| Offside Rear Direction indicator incorrect colour (4.4.3 (a)) | 3 |
| Front Brake lever has insufficient reserve travel |1.1.2 |a|| | 3 |