F'n Headlight

dr_snow · 03-07-2011, 05:06 PM

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?

bpeckm · 03-07-2011, 05:26 PM

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...

dr_snow · 03-07-2011, 05:45 PM

I suppose that is a good way to do it. I'll ride around the neighborhood this evening and dial it in. Thanks.

fishkens · 03-07-2011, 06:14 PM

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.

03-07-2011, 05:06 PM	#1
dr_snow ^OP Junky Joined: Feb 2006 Location: The Great Sage Basin Oddometer: 589	F'n Headlight 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? __________________ It's not an adventure if you don't get lost.

03-07-2011, 05:26 PM	#2
bpeckm Grin! Joined: Apr 2008 Location: Road Island Oddometer: 4,430	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... __________________ XS650 becomes a Vermont Backroader R60/6 gets caffeinated Portsmouth RI

03-07-2011, 05:45 PM	#3
dr_snow ^OP Junky Joined: Feb 2006 Location: The Great Sage Basin Oddometer: 589	I suppose that is a good way to do it. I'll ride around the neighborhood this evening and dial it in. Thanks. __________________ It's not an adventure if you don't get lost.

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03-07-2011, 06:14 PM	#4
fishkens Further... Joined: Nov 2009 Location: Seattle, WA Oddometer: 5,146	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.