GL1000 Timing advance unit


Information and questions on GL1000 Goldwings (1975-1979)
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TechSpeaker
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GL1000 Timing advance unit

Post by TechSpeaker »



I'm in the process of getting my points fixed on my '78 gl1000, and my timing advance unit is definitely bad (Covered in rust, And I think missing a piece) The only thing I found to replace it with is this:

https://www.ebay.com/itm/Honda-GL1000- ... SwSzNbiGV5

Should this work?

I have new points and a condenser.


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ekvh
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Re: GL1000 Timing advance unit

Post by ekvh »

Should work. I believe it will say 431 on it somewhere for 78-79 years. 75-77 were different. They had timing from 5 -37 degrees advance and different springs. The 78-79 had 10-37 degrees advance.
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Re: GL1000 Timing advance unit

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ekvh wrote: Tue Mar 19, 2019 1:40 pm Should work. I believe it will say 431 on it somewhere for 78-79 years. 75-77 were different. They had timing from 5 -37 degrees advance and different springs. The 78-79 had 10-37 degrees advance.
I got it, but it looks like I'm missing some sort of sheath and the retaining bolt and washer (I probably lost them.) any idea where I can get another?
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ekvh
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Re: GL1000 Timing advance unit

Post by ekvh »

Bolt is a standard metric size. Not sure what you mean by sheath.
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Re: GL1000 Timing advance unit

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ekvh wrote: Fri Mar 22, 2019 4:39 pm Bolt is a standard metric size. Not sure what you mean by sheath.
It looks to me like there's a piece that sits over the piece I bought. I'm not sure what it is though.
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ekvh
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Re: GL1000 Timing advance unit

Post by ekvh »

Never seen this before. Maybe someone else will recognize it.


You need the thinner piece as in the top photo.
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ekvh
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Re: GL1000 Timing advance unit

Post by ekvh »

It has two slots near the base so the “arms” of the mechanical advance can move the lobes accordingly. You can see it in your top photo
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Re: GL1000 Timing advance unit

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ekvh wrote: Fri Mar 22, 2019 8:17 pm It has two slots near the base so the “arms” of the mechanical advance can move the lobes accordingly. You can see it in your top photo
Thats strange, it was on the old one too... although, it was the wrong year model advancer... any idea what I could do about this?
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Re: GL1000 Timing advance unit

Post by DenverWinger »

If you look carefully at the post above with the two pictures, in the top picture you'll see that the outside of the shaft isn't round, if you were looking at it from the top down it would be oval shape. This unit with the smooth oval is for points. The other one with the sharp edges for electronic ignition pickups. Surprises me the triggers are so wide, I would expect just two small nubs....
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ekvh
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Re: GL1000 Timing advance unit

Post by ekvh »

Another notable difference is the “bumpers” for the springs. I noticed them comparing a set of 431 to 371 advancers. I call them bumpers but don’t know what purpose they serve. The springs rest against them at full advance.

As Denverwinger pointed out, the cam bumps are very small. Poke around your parts boxes and you might find it. Most who go on trips wrap up the points plate and the cam and wires to be able to switch over to on the road if the electriconic fails.
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TechSpeaker
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Re: GL1000 Timing advance unit

Post by TechSpeaker »

DenverWinger wrote: Sat Mar 23, 2019 6:28 am If you look carefully at the post above with the two pictures, in the top picture you'll see that the outside of the shaft isn't round, if you were looking at it from the top down it would be oval shape. This unit with the smooth oval is for points. The other one with the sharp edges for electronic ignition pickups. Surprises me the triggers are so wide, I would expect just two small nubs....
Ohhh okay I hadn’t noticed that it was oval and was super confused as to how it worked like that... does anyone know if I can get just the oval piece? Or will I need to find a different advancer entirely?
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ekvh
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Re: GL1000 Timing advance unit

Post by ekvh »

I’m sure lots of them kick around until someone says, “What the heck is this?” And then toss it in the garbage.

Try a post in the wanted section. Not sure if available from Honda still. I believe they’re the same 75-79 for that piece.
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Re: GL1000 Timing advance unit

Post by Old Fogey »

Auto advance 78-79 stamped 431, 75-77 stanped 371. Different timing.


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