| Most common failures | No# failures |
|---|
| Headlamp aim out of alignment | 274 |
| Drive chain excessively loose (6.1.7 (c) (i)) | 79 |
| Headlamp not working on dipped beam (4.1.1 (a) (ii)) | 60 |
| Stop lamp remains on when the brakes are released | 49 |
| Drive chain worn to excess (6.1.7 (c) (i)) | 36 |
| Rear Brake excessively binding (1.2.1 (f)) | 33 |
| Rear Position lamp not working (4.2.1 (a)) | 32 |
| Front Brake excessively binding (1.2.1 (f)) | 29 |
| Headlamp not working on main beam (4.1.1 (a) (ii)) | 22 |
| Wheel alignment incorrect which adversely affects the handling (2.4 (a)) | 20 |
| Drive chain horseshoe locking device incorrectly fitted (6.1.7 (j) (i)) | 20 |
| Steering headbearing excessively stiff or notchy (2.2.2 (f) (i)) | 20 |
| Drive chain so loose it is likely to fail (6.1.7 (c) (ii)) | 18 |
| Offside Front Shock absorber has a serious fluid leak (5.3.2 (b)) | 18 |
| Rear Brake pedal not releasing correctly and functionality of brakes affected (1.1.2 (b) (ii)) | 18 |
| Drive chain excessively tight (6.1.7 (k) (i)) | 17 |
| Headlamp insecure (4.1.1 (c)) | 17 |
| Rear Stop lamp not working (4.3.1 (a) (ii)) | 17 |
| Nearside Front Shock absorber has a serious fluid leak (5.3.2 (b)) | 15 |
| Front Position lamp not working (4.2.1 (a)) | 14 |
| Rear Drive chain sprocket worn to excess (6.1.7 (c) (i)) | 14 |
| Drive chain so worn it is likely to fail (6.1.7 (c) (ii)) | 13 |
| Roller brake test The less effective brake control does not achieve an efficiency of 25% (1.2.2 (a) (i)) | 13 |
| Front Headlamp not working on dipped beam (4.1.1 (a) (ii)) | 13 |
| Horn not working (7.7 (a)) | 13 |
| Wheel alignment incorrect which adversely affects the steering (2.4 (a)) | 11 |
| Rear Wheel bearing has excessive play (5.1.3 (a) (i)) | 11 |
| Headlamp aim projected beam image obviously incorrect (4.1.2 (c)) | 11 |
| Exhaust has a major leak of exhaust gases (6.1.2 (a)) | 10 |
| Registration plate issues | 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 |
| Headlamp not working on dipped beam |4.1.1 |a| |ii|| | 8 |
| Drive chain excessively loose |6.1.7 |c| |i|| | 8 |
| Headlamp aim not tested (4.1.2 (b)) | 8 |
| Nearside Front Direction indicator not working (4.4.1 (a) (ii)) | 8 |
| Drive chain sprocket worn to excess (6.1.7 (c) (i)) | 8 |
| Stop lamp does not illuminate by the operation of both brake controls (4.3.2 (a) (iii)) | 8 |
| Throttle operating incorrectly (6.2.7 (a) (i)) | 7 |
| Rear Brake grabbing severely (1.2.1 (c)) | 7 |
| Drive chain excessively tight, so that it is likely to fail (6.1.7 (k) (ii)) | 7 |
| Nearside Handlebar grip insecure to handlebar (2.2.1 (d) (ii)) | 7 |
| Rear Drive chain excessively loose (6.1.7 (c) (i)) | 7 |
| Rear Brake pedal has insufficient reserve travel (1.1.2 (a)) | 7 |
| Rear Position lamp not working |4.2.1 |a|| | 6 |
| Rear Brake excessively binding |1.2.1 |f|| | 6 |
| Nearside Rear Drive chain excessively loose (6.1.7 (c) (i)) | 6 |
| Exhaust system insecure (6.1.2 (a)) | 6 |
| Rear Brake indicates excessive fluctuation of brake effort (1.2.1 (e)) | 6 |
| Rear Stop lamp does not illuminate by the operation of both brake controls (4.3.2 (a) (iii)) | 6 |
| Rear Stop lamp not working |4.3.1 |a| |ii|| | 5 |
| Drive chain so loose it is likely to fail |6.1.7 |c| |ii|| | 5 |
| Headlamp aim so that beam "kick up" is not visible on the screen (4.1.2 (a)) | 5 |
| Front Stop lamp not working (4.3.1 (a) (ii)) | 5 |
| Front Steering headbearing excessively stiff or notchy (2.2.2 (f) (i)) | 5 |
| Offside Front Direction indicator not working (4.4.1 (a) (ii)) | 5 |
| Brake pedal not releasing correctly and functionality of brakes affected (1.1.2 (b) (ii)) | 5 |
| Rear Drive chain sprocket so worn it is likely to fail (6.1.7 (c) (ii)) | 5 |
| Nearside Handlebar grip insecure to handlebar |2.2.1 |d| |ii|| | 4 |
| Front Brake excessively binding |1.2.1 |f|| | 4 |
| Steering headbearing excessively stiff or notchy |2.2.2 |f| |i|| | 4 |
| Front Headlamp not working on main beam (4.1.1 (a) (ii)) | 4 |
| Nearside Front Handlebar grip insecure to handlebar (2.2.1 (d) (ii)) | 4 |
| Handlebar deformed to the extent that steering is affected (2.2.1 (c) (ii)) | 4 |
| Handlebar excessively deformed (2.2.1 (c) (i)) | 4 |
| Rear Brake pedal pivot excessively tight (1.1.1 (a)) | 4 |
| Headlamp incorrect colour (4.1.4 (a)) | 4 |
| Rear reflector missing (4.8.2 (a) (ii)) | 4 |
| Nearside Rear Footrest missing (6.2.12 (a)) | 4 |
| Front Headlamp aim projected beam image obviously incorrect (4.1.2 (c)) | 4 |
| Headlamp aim unable to be tested (4.1.2 (b)) | 4 |
| Wheel alignment incorrect which adversely affects the steering |2.4 |a|| | 3 |
| Brake pedal has insufficient reserve travel |1.1.2 |a|| | 3 |
| Drive chain worn to excess |6.1.7 |c| |i|| | 3 |
| Exhaust system insecure |6.1.2 |a|| | 3 |
| Headlamp insecure |4.1.1 |c|| | 3 |
| Roller brake test The less effective brake control does not achieve an efficiency of 25% |1.2.2 |a| |i|| | 3 |
| Front Steering headbearing has excessive wear or free play (2.2.2 (f) (i)) | 3 |
| Throttle control functioning such that safe operation of the motorcycle is adversely affected (6.2.7 (a) (ii)) | 3 |
| Nearside Rear Drive chain so loose it is likely to fail (6.1.7 (c) (ii)) | 3 |
| Rear Drive chain sprocket excessively loose (6.1.7 (c) (i)) | 3 |
| Rear Stop lamp switch with a delay in operation (4.3.2 (a) (ii)) | 3 |
| Registration plate lamp issues | 3 |
| Rear Suspension arm pin or bush excessively worn (5.3.4 (a) (i)) | 3 |
| Rear Brake pedal is positioned so that the brake cannot be readily applied (1.1.2 (d)) | 3 |
| Front Brake lever is bent and the brake cannot be readily applied (1.1.2 (d)) | 3 |
| Offside Rear Direction indicator not working (4.4.1 (a) (ii)) | 3 |
| Offside Handlebar grip insecure to handlebar (2.2.1 (d) (ii)) | 3 |
| Offside Rear Footrest missing (6.2.12 (a)) | 3 |
| Rear Brake lining(s) less than 1.0 mm thick (1.1.13 (a)) | 3 |
| Rear All position lamps not working (4.2.1 (a)) | 3 |
| Dipswitch does not operate immediately when selected on main beam (4.1.3 (b)) | 3 |