| Most common failures | No# failures |
|---|
| Registration plate lamp issues | 144 |
| Headlamp aim out of alignment | 95 |
| Stop lamp remains on when the brakes are released | 62 |
| Roller brake test The less effective brake control does not achieve an efficiency of 25% (1.2.2 (a) (i)) | 49 |
| Steering movement excessively `notchy` with the wheel raised |2.2.1b| | 46 |
| Front Brake excessively binding (1.2.1 (f)) | 42 |
| Stop lamp not working (4.3.1 (a) (ii)) | 39 |
| Registration plate issues | 33 |
| Front Stop lamp not working (4.3.1 (a) (ii)) | 32 |
| Rear Brake lever has insufficient reserve travel (1.1.2 (a)) | 32 |
| Nearside Front Shock absorber has a serious fluid leak (5.3.2 (b)) | 30 |
| Rear Brake lever has inadequate reserve travel |3.1.3b| | 28 |
| Offside Front Shock absorber has a serious fluid leak (5.3.2 (b)) | 28 |
| Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 27 |
| Rear Stop lamp not working (4.3.1 (a) (ii)) | 24 |
| Front Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 23 |
| Front Brake excessively binding |1.2.1 |f|| | 22 |
| Riders seat insecure (6.2.5 (a) (ii)) | 21 |
| Front Roller brake test indicates a binding brake |3.3.A1a| | 18 |
| Roller brake test The less effective brake control does not achieve an efficiency of 25%. |3.3.A2b| | 16 |
| Riders seat insecure |6.2.1a| | 15 |
| Rear Brake lever has insufficient reserve travel |1.1.2 |a|| | 15 |
| Roller brake test The less effective brake control does not achieve an efficiency of 25% |1.2.2 |a| |i|| | 15 |
| Steering headbearing excessively stiff or notchy (2.2.2 (f) (i)) | 15 |
| Stop lamp not working |4.3.1 |a| |ii|| | 14 |
| Front brake disc in such a condition that it is seriously weakened | 14 |
| Front Shock absorber has a serious fluid leak (5.3.2 (b)) | 14 |
| Front Brake indicates excessive fluctuation of brake effort (1.2.1 (e)) | 13 |
| Nearside Front Shock absorber has a serious fluid leak |5.3.2 |b|| | 12 |
| Riders seat insecure |6.2.5 |a| |ii|| | 12 |
| Steering movement excessively `notchy` with the weight on the lower bearing |2.2.1a| | 12 |
| Steering headbearing excessively stiff or notchy |2.2.2 |f| |i|| | 11 |
| Front Position lamp not working (4.2.1 (a)) | 11 |
| Headlamp not working on dipped beam (4.1.1 (a) (ii)) | 11 |
| Nearside Front Position lamp not working (4.2.1 (a)) | 11 |
| Rear Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 11 |
| Rear Brake effort inadequate at a wheel (1.2.1 (a) (i)) | 10 |
| Front Brake fluid reservoir fluid level dangerously low |3.2.B1d| | 10 |
| Nearside Front shock absorber seal failed and leaking oil |2.3.3| | 10 |
| Rear position lamp does not illuminate immediately when it is switched on |1.1.3a| | 10 |
| Rear Position lamp not working (4.2.1 (a)) | 10 |
| Stop lamp does not illuminate by the operation of both brake controls (4.3.2 (a) (iii)) | 9 |
| Rear Brake excessively binding (1.2.1 (f)) | 9 |
| Front Brake disc significantly and obviously worn (1.1.14 (a) (i)) | 9 |
| Offside Front Shock absorber has a serious fluid leak |5.3.2 |b|| | 8 |
| Handlebar deformed |2.1.1b| | 8 |
| Offside Front Position lamp not working (4.2.1 (a)) | 8 |
| Front Brake disc|s| excessively worn |3.2.A1l| | 8 |
| Nearside Handlebar grip insecure to handlebar (2.2.1 (d) (ii)) | 8 |
| Front Stop lamp not working |4.3.1 |a| |ii|| | 8 |
| Rear Brake effort inadequate at a wheel |1.2.1 |a| |i|| | 7 |
| Nearside Rear Shock absorber has a serious fluid leak (5.3.2 (b)) | 7 |
| Rear Stop lamp not working |4.3.1 |a| |ii|| | 7 |
| Front Wheel bearing has excessive play (5.1.3 (a) (i)) | 7 |
| Rear Brake has no recorded effort at a wheel (1.2.1 (a) (ii)) | 7 |
| Nearside Brake lever has inadequate reserve travel |3.1.3b| | 7 |
| Front Brake indicates excessive fluctuation of brake effort |1.2.1 |e|| | 7 |
| Headlamp not working on main beam (4.1.1 (a) (ii)) | 7 |
| Headlamp at least one does not illuminate on dipped beam |1.2.2a|i|| | 7 |
| Offside Front shock absorber seal failed and leaking oil |2.3.3| | 6 |
| Nearside Front Front shock absorber seal failed and leaking oil |2.3.3| | 6 |
| Front Brake lever cannot be applied smoothly |3.1.3d| | 6 |
| Rear Stop lamp does not illuminate by the operation of both brake controls (4.3.2 (a) (iii)) | 6 |
| Front Brake disc significantly and obviously worn |1.1.14 |a| |i|| | 6 |
| Rear Position lamp not working |4.2.1 |a|| | 6 |
| Headlamp at least one does not illuminate on main beam |1.2.2a|ii|| | 6 |
| Rear Shock absorber has negligible damping effect (5.3.2 (b)) | 5 |
| Nearside Rear Brake lever has inadequate reserve travel |3.1.3b| | 5 |
| Nearside Handlebar handgrip not secure to handlebars. |2.1.1c| | 5 |
| Steering headbearing has excessive free play |2.2.2| | 5 |
| Front Steering headbearing excessively stiff or notchy (2.2.2 (f) (i)) | 5 |
| Nearside Front Brake lever has insufficient reserve travel (1.1.2 (a)) | 5 |
| Rear Wheel bearing rough when rotated |5.1.3 |b| |i|| | 5 |
| Rear Wheel bearing rough when rotated (5.1.3 (b) (i)) | 5 |
| Throttle has a significant change in engine speed whilst moving the steering from lock to lock |2.1.4| | 5 |
| Rear Brake lining(s) less than 1.0 mm thick (1.1.13 (a)) | 5 |
| Steering headbearing has excessive wear or free play (2.2.2 (f) (i)) | 4 |
| Offside Rear Shock absorber has a serious fluid leak (5.3.2 (b)) | 4 |
| Offside Front Front shock absorber seal failed and leaking oil |2.3.3| | 4 |
| Rear Brake lining|s| less than 1.5 mm thick |3.2.A1f|i|| | 4 |
| Brake lever has inadequate reserve travel |3.1.3b| | 4 |
| Stop lamp remains on when the brake is released |1.3.1e| | 4 |
| Rear Roller brake test indicates brake effort rise disproportional to brake lever or pedal effort |3.3.A1c| | 4 |
| Front Stop lamp does not illuminate by the operation of both brake controls (4.3.2 (a) (iii)) | 4 |
| Front shock absorber seal failed and leaking oil |2.3.3| | 4 |
| Offside Front Position lamp not working |4.2.1 |a|| | 4 |
| Offside Rear Shock absorber has negligible damping effect (5.3.2 (b)) | 4 |
| Nearside Front Front position lamp damaged and function impaired |1.1.1b| | 4 |
| Nearside Handlebar grip insecure to handlebar |2.2.1 |d| |ii|| | 4 |
| Dipswitch does not operate immediately when selected on dipped beam (4.1.3 (b)) | 4 |
| Rear Brake indicates excessive fluctuation of brake effort (1.2.1 (e)) | 4 |
| Front position lamp does not illuminate immediately when switched on |1.1.3a| | 4 |
| Front Wheel bearing rough when rotated (5.1.3 (b) (i)) | 4 |