F'n Headlight

Discussion in 'Airheads' started by Albino Reino, Mar 7, 2011.

  1. Albino Reino

    Albino Reino Junky

    Joined:
    Feb 13, 2006
    Oddometer:
    695
    Location:
    The Great Sage Basin
    I have a 91 gspd and I am replacing the headlight assembly. It is a pain in the ass. I got it in and had to fab a few plastic thingy majigers to hold the assembly to the mounting frame........blah blah blah.

    I want to position it correctly. I understand how to do it but, I would like to know where to line it up.

    Example: I am sitting on the bike, no stand or side stand, center of the light lines up with center of bike on a vertical plane. On a horizontal plane the center of the light is three feet off the ground when I am ten feet away from the wall.

    Does anyone have some numbers on this?
    #1
  2. bpeckm

    bpeckm Grin!

    Joined:
    Apr 2, 2008
    Oddometer:
    7,000
    Location:
    Road Island
    I have adjusted it by trial: snug the holders so that it takes a little force to move it, then go out for a spin (at night!) and move it up or down to your riding satisfaction, hi- and low-beam....'s a matter of fact, I leave it "adjustable"so's I can re-adjust on the fly...:D
    #2
  3. Albino Reino

    Albino Reino Junky

    Joined:
    Feb 13, 2006
    Oddometer:
    695
    Location:
    The Great Sage Basin
    I suppose that is a good way to do it. I'll ride around the neighborhood this evening and dial it in. Thanks.
    #3
  4. fishkens

    fishkens Long timer

    Joined:
    Nov 14, 2009
    Oddometer:
    5,360
    Location:
    Seattle, WA
    Page 38 of my 88 GS owners manual describes how to aim the headlight.

    I don't have a scanner handy but here's the gist:

    - front axle 16.4 ft from a wall on level ground
    - with the bike on its wheels and rider on the bike transfer the vertical distance from the ground to the center of the headlight to the wall
    - make a second mark 5 cm or 2" below the first
    - turn the headlight on low beam and adjust until the light/dark boundary to the left of the beam hits the lower line

    That's a starting point from the fatherland.
    #4