How do you set the clock on Harley Davidson Sportser 1200 XL Custom?

Get the Clock displayed by pressing the button on the back of the speedo. Once there, press and hold the button until the clock display starts to flash. First it will ask if you want 12 hour time or 24 hour time. Quickly press the button to change between them. Press and HOLD for the choice to be saved. It will continue like this for the hour selection and the minute selection. Once you press and HOLD for the minute selection, you will be back at the normal display modes where clicking the button selects the clock, odometer, Trip A and Trip B.

That's it!