Press and hold the SEL button and turn on the ignition switch and hold for a further 2 seconds or more.
Press the ADJ button to change the light mode (light-blink-no light-light)
Press the SEL button to advance to light brightness selection showing 0 00 000 0000 00000 in the odometer display. Use the ADJ button to select.
Press the SEL button to advance to RPM set and again set using the ADJ button the press SEL to fix the setting.
Hope this helps, Jim