| Most common failures | No# failures |
|---|
| Headlamp aim out of alignment | 68 |
| Registration plate lamp issues | 67 |
| Rear Brake lever has insufficient reserve travel (1.1.2 (a)) | 30 |
| Stop lamp remains on when the brakes are released | 29 |
| Registration plate issues | 25 |
| Rear Stop lamp not working (4.3.1 (a) (ii)) | 16 |
| Roller brake test The less effective brake control does not achieve an efficiency of 25% (1.2.2 (a) (i)) | 13 |
| Headlamp not working on dipped beam (4.1.1 (a) (ii)) | 12 |
| Front Position lamp not working (4.2.1 (a)) | 11 |
| Front Brake excessively binding (1.2.1 (f)) | 11 |
| Rear Shock absorber has negligible damping effect (5.3.2 (b)) | 11 |
| Nearside Front Shock absorber has a serious fluid leak (5.3.2 (b)) | 11 |
| Stop lamp does not illuminate by the operation of both brake controls (4.3.2 (a) (iii)) | 10 |
| Front Valve stem seriously damaged (5.2.3 (j)) | 9 |
| Rear Brake lever has inadequate reserve travel |3.1.3b| | 9 |
| Nearside Handlebar grip insecure to handlebar (2.2.1 (d) (ii)) | 9 |
| Stop lamp not working (4.3.1 (a) (ii)) | 9 |
| Rear Position lamp not working (4.2.1 (a)) | 8 |
| Front Brake disc significantly and obviously worn (1.1.14 (a) (i)) | 8 |
| Horn not working (7.7 (a)) | 7 |
| Front brake disc in such a condition that it is seriously weakened | 6 |
| Rear Stop lamp does not illuminate by the operation of both brake controls (4.3.2 (a) (iii)) | 6 |
| Front Stop lamp not working (4.3.1 (a) (ii)) | 6 |
| Rear Valve stem seriously damaged (5.2.3 (j)) | 6 |
| Offside Front Position lamp not working (4.2.1 (a)) | 5 |
| Rear Brake lever has insufficient reserve travel |1.1.2 |a|| | 5 |
| Offside Front Shock absorber has a serious fluid leak (5.3.2 (b)) | 5 |
| Nearside Front Position lamp not working (4.2.1 (a)) | 5 |
| Headlamp not working on dipped beam |4.1.1 |a| |ii|| | 5 |
| Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 4 |
| Headlamp at least one does not illuminate on dipped beam |1.2.2a|i|| | 4 |
| Rear Brake drum significantly and obviously worn (1.1.14 (a) (i)) | 4 |
| Front Brake indicates excessive fluctuation of brake effort (1.2.1 (e)) | 4 |
| Rear Stop lamp remains on when the brake is released |1.3.1e| | 3 |
| Headlamp at least one does not illuminate on main beam |1.2.2a|ii|| | 3 |
| Nearside Rear Shock absorber has a serious fluid leak (5.3.2 (b)) | 3 |
| Headlamp not working on main beam |4.1.1 |a| |ii|| | 3 |
| Rear Brake effort inadequate at a wheel (1.2.1 (a) (i)) | 3 |
| Steering headbearing excessively stiff or notchy (2.2.2 (f) (i)) | 3 |
| Rear Brake lining|s| less than 1.0 mm thick |1.1.13 |a|| | 3 |
| Front Wheel excessively distorted (5.2.2 (c) (i)) | 3 |
| Front Brake disc significantly and obviously worn |1.1.14 |a| |i|| | 3 |
| Headlamp not working on main beam (4.1.1 (a) (ii)) | 3 |
| Steering headbearing has excessive wear or free play (2.2.2 (f) (i)) | 3 |
| Front All position lamps not working (4.2.1 (a)) | 3 |
| Rear Brake has no recorded effort at a wheel (1.2.1 (a) (ii)) | 3 |
| Rear Brake lining(s) less than 1.0 mm thick (1.1.13 (a)) | 3 |
| Steering movement excessively `notchy` with the wheel raised |2.2.1b| | 3 |
| Rear Stop lamp not working |4.3.1 |a| |ii|| | 3 |
| Front Headlamp not working on dipped beam (4.1.1 (a) (ii)) | 3 |
| Horn not working |7.7 |a| |ii|| | 3 |
| Nearside Front Handlebar grip insecure to handlebar (2.2.1 (d) (ii)) | 3 |
| Rear Shock absorber has a serious fluid leak (5.3.2 (b)) | 3 |
| Nearside Brake lever has insufficient reserve travel (1.1.2 (a)) | 2 |
| Nearside Stop lamp not working (4.3.1 (a) (ii)) | 2 |
| Stop lamp remains on when the brake is released |1.3.1e| | 2 |
| Rear Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 2 |
| Roller brake test The less effective brake control does not achieve an efficiency of 25% |1.2.2 |a| |i|| | 2 |
| Shock absorber has a serious fluid leak (5.3.2 (b)) | 2 |
| Headlamp aim not tested (4.1.2 (b)) | 2 |
| Front Steering headbearing excessively stiff or notchy (2.2.2 (f) (i)) | 2 |
| Riders seat with a defective supporting structure (6.2.5 (a) (i)) | 2 |
| Rear Shock absorber has negligible damping effect |5.3.2 |b|| | 2 |
| Headlamp aim projected beam image obviously incorrect (4.1.2 (c)) | 2 |
| Horn not working (7.7 (a) (ii)) | 2 |
| Floor brake test The less effective brake control does not achieve an efficiency of 25% (1.2.2 (a) (i)) | 2 |
| Front Brake indicates excessive fluctuation of brake effort |1.2.1 |e|| | 2 |
| Rear Brake lever has abnormal movement of levers indicating excessive wear or maladjustment (1.1.15 (f)) | 2 |
| Front Wheel bearing rough when rotated (5.1.3 (b) (i)) | 2 |
| Front Brake lever cannot be applied smoothly |3.1.3d| | 2 |
| Brake lever has insufficient reserve travel (1.1.2 (a)) | 2 |
| Front Shock absorber has negligible damping effect (5.3.2 (b)) | 2 |
| Rear Brake excessively binding (1.2.1 (f)) | 2 |
| Stop lamp not working |4.3.1 |a| |ii|| | 2 |
| Nearside Front Front position lamp does not illuminate immediately when switched on |1.1.3a| | 2 |
| Front Headlamp insecure (4.1.1 (c)) | 2 |
| Rear Brake lagging in operation (1.2.1 (d)) | 2 |
| Front Shock absorber has a serious fluid leak (5.3.2 (b)) | 2 |
| Riders seat insecure (6.2.5 (a) (ii)) | 2 |
| Front Steering headbearing has excessive wear or free play (2.2.2 (f) (i)) | 2 |
| Front Stop lamp not working |4.3.1 |a| |ii|| | 2 |
| Front Headlamp not working on main beam (4.1.1 (a) (ii)) | 2 |