GL1000 starter rebuild - reduction gear head assembly


Information and questions on GL1000 Goldwings (1975-1979)
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2ireland@telus.net
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Location: Duncan, British Columbia, Canada
Motorcycle: 1976 GL1000

GL1000 starter rebuild - reduction gear head assembly

Post by 2ireland@telus.net »



I realize that there is already a very thorough article on this site, posted by WingAdmin but written by Tim Wentzell, regarding "How to remove, rebuild and reinstall your starter", but it is specific to a GL1100 starter. That is very similar to a GL1000 starter, but it is not the same. For example, you can't remove the armature in my starter as described in the Wentzell article. Secondly, my starter has four (4) thin washers on the commutator, not one thick one and two thin ones. My problem is removing the 'reduction gear head assembly' (see photo) from the front end housing to clean and re-grease it. I cannot simply "remove the Circlip and push the shaft through the “head”. Nor can I remove the triangular clip holding the bearing and remove them both from the head. I have tried 'driving them out' by tapping with a rubber mallet. I don't want to use too much for in case I do some damage.

Has anyone else encountered this situation, and if so, how were you able to resolve it?

Thanks.
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reduction gear head assembly in front end
reduction gear head assembly in front end



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DenverWinger
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Re: GL1000 starter rebuild - reduction gear head assembly

Post by DenverWinger »

This also begs the question, do we know if the starter you are rebuilding is an OEM or aftermarket starter? With the age of these bikes anything is possible.

Maybe someone here has a GL1000 Service manual, and can compare your description and the gearhead in the photo and come up with the answers. :)
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2ireland@telus.net
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Location: Duncan, British Columbia, Canada
Motorcycle: 1976 GL1000

Re: GL1000 starter rebuild - reduction gear head assembly

Post by 2ireland@telus.net »

The starter is OEM. I have owned the bike since new, June 1976. I have the service manual but it doesn't go into such detail. It only talks about the brush length and commutator diameter. It does not discuss disassembly.
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flyday58
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1976 GL1000 LTD
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Re: GL1000 starter rebuild - reduction gear head assembly

Post by flyday58 »

The starter section in my Honda GL1000 manual is only eight pages long, and says nothing about the drive reduction assembly. I am guessing from your pic that the bearing is pressed in, retaining the drive in the process; or am I seeing threads on the drive shaft? Excellent pic, btw.
"Who left the fridge open?" Tug Speedman
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2ireland@telus.net
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Location: Duncan, British Columbia, Canada
Motorcycle: 1976 GL1000

Re: GL1000 starter rebuild - reduction gear head assembly

Post by 2ireland@telus.net »

The shaft is held in place by a circlip that has been removed in the photo. There is also a triangular clip around the exterior of the case opening that holds the bearing in place. What you see that you wonder whether it is threads or not is the groove for the circlip. In the existing document I refer to (viewtopic.php?t=259) it says you should be able to remove the circlip and push the shaft out of the head. No need to remove the triangular clip to remove the bearing unless you want to. I have removed both clips, one at a time, to see if I could push them out of the head to clean, but no luck. I don't want to drive too hard with my mallet for fear of damaging something like the shaft or bearing.

I am attaching a copy of a photo from the starter rebuild article I refer to above to illustrate the 'clips' I am referring to.

Picture borrowed from Wentzell article showing clips holding head assembly in place
Picture borrowed from Wentzell article showing clips holding head assembly in place

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flyday58
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Location: Cloudcroft NM
Motorcycle: 1976 GL1000
1976 GL1000 LTD
1981 CB750C
1997 BMW R1100RT
1974 Yamaha GT80

Re: GL1000 starter rebuild - reduction gear head assembly

Post by flyday58 »

2ireland@telus.net wrote: Sun Apr 07, 2019 10:54 am The shaft is held in place by a circlip that has been removed in the photo.
In that case the shaft must press in from behind, a few solid taps with the mallet should be enough to determine if it will move and not damage anything.
"Who left the fridge open?" Tug Speedman
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2ireland@telus.net
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Location: Duncan, British Columbia, Canada
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Re: GL1000 starter rebuild - reduction gear head assembly

Post by 2ireland@telus.net »

I have done strikes with a rubber mallet, very often, quite firmly. No go.

I am hoping to hear from someone who has actually done this before on a GL1000 starter, so that I can get some assurance that the head assembly will actually come out safely if hit 'how hard'? I am trying to avoid well intentioned guesses.


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