Starter Bendix
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Stellar HDF Member
Joined: Apr 2007
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I may need to find a longer one like you pictured. I'm going to try to mock it all up today with new clutch shell/ring gear, new Bendix and new primary chain. Looking at the parts on the bench, it seems that if the Bendix travels too far out it will definitely hit the rivet heads on the ring gear. I've never paid attention to the travel of the Bendix until now, but something sure caused my Bendix surface to get chewed up, and chewed up the ring gear.
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Stellar HDF Member
Joined: Apr 2007
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now that I'm really studying this situation, I'm beginning to believe my problem may be with the 32 amp Ultima charging system I installed. I'm wondering if I got the spacing on the rotor/compensator/primary chain correct.
I have read things where people reused their old rotor to have the spacing correct. Is that something that can be done, or do you have to use the new rotor from the kit?
Maybe my primary chain is misaligned and messed up my ring gear.
I have read things where people reused their old rotor to have the spacing correct. Is that something that can be done, or do you have to use the new rotor from the kit?
Maybe my primary chain is misaligned and messed up my ring gear.
Seasoned HDF Member
Joined: Jul 2014
Posts: 8,556
Likes: 3,310
From: Cental, MI
now that I'm really studying this situation, I'm beginning to believe my problem may be with the 32 amp Ultima charging system I installed. I'm wondering if I got the spacing on the rotor/compensator/primary chain correct.
I have read things where people reused their old rotor to have the spacing correct. Is that something that can be done, or do you have to use the new rotor from the kit?
Maybe my primary chain is misaligned and messed up my ring gear.
I have read things where people reused their old rotor to have the spacing correct. Is that something that can be done, or do you have to use the new rotor from the kit?
Maybe my primary chain is misaligned and messed up my ring gear.
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Stellar HDF Member
Joined: Apr 2007
Posts: 3,008
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True, but if the front sprocket is sitting out too far maybe it is pulling the primary chain into the ring gear.
Just a thought, I'll inspect it when I get home.
If need be, can I use the old rotor with the new charging system?
Just a thought, I'll inspect it when I get home.
If need be, can I use the old rotor with the new charging system?
Seasoned HDF Member
Joined: Jul 2014
Posts: 8,556
Likes: 3,310
From: Cental, MI
That IDK... I have always mixed and matched... but, only O.E. Stuff...
Seasoned HDF Member
Joined: Nov 2009
Posts: 15,705
Likes: 22,711
From: Farmington ,MS
In 1991 they decided to get rid of it...the aftermarket made the rotor to fit both..
They simply include the spacer...looks like a big washer...on a 70-90 bike you use the spacer....91-up you don't.
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Stellar HDF Member
Joined: Apr 2007
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upon further inspection, several measurements, and careful attention, what I believe to have happened is this:
the starter jackshaft had 2 thrust washers at the end by the primary cover bearing. I think because of that the jackshaft had no in/out free play. When the solenoid kicked out the Bendix it only went partially onto the ring gear, The ring gear is 3 pieces sandwiched together. The Bendix only engaged the first (maybe the second also) layer of the ring gear, and it was too weak by itself. It began to bend and break the teeth on the inside layer of the 3 part ring gear. The bent and broken ring gear teeth chewed up the Bendix, and on and on.
It looks like with only 1 thrust washer on the jackshaft the Bendix and jackshaft will have more travel outwards and the Bendix will fully engage the ring gear.
Anybody seen this before?
Does it sound reasonable?
the starter jackshaft had 2 thrust washers at the end by the primary cover bearing. I think because of that the jackshaft had no in/out free play. When the solenoid kicked out the Bendix it only went partially onto the ring gear, The ring gear is 3 pieces sandwiched together. The Bendix only engaged the first (maybe the second also) layer of the ring gear, and it was too weak by itself. It began to bend and break the teeth on the inside layer of the 3 part ring gear. The bent and broken ring gear teeth chewed up the Bendix, and on and on.
It looks like with only 1 thrust washer on the jackshaft the Bendix and jackshaft will have more travel outwards and the Bendix will fully engage the ring gear.
Anybody seen this before?
Does it sound reasonable?
Seasoned HDF Member
Joined: Jul 2014
Posts: 8,556
Likes: 3,310
From: Cental, MI
upon further inspection, several measurements, and careful attention, what I believe to have happened is this:
the starter jackshaft had 2 thrust washers at the end by the primary cover bearing. I think because of that the jackshaft had no in/out free play. When the solenoid kicked out the Bendix it only went partially onto the ring gear, The ring gear is 3 pieces sandwiched together. The Bendix only engaged the first (maybe the second also) layer of the ring gear, and it was too weak by itself. It began to bend and break the teeth on the inside layer of the 3 part ring gear. The bent and broken ring gear teeth chewed up the Bendix, and on and on.
It looks like with only 1 thrust washer on the jackshaft the Bendix and jackshaft will have more travel outwards and the Bendix will fully engage the ring gear.
Anybody seen this before?
Does it sound reasonable?
the starter jackshaft had 2 thrust washers at the end by the primary cover bearing. I think because of that the jackshaft had no in/out free play. When the solenoid kicked out the Bendix it only went partially onto the ring gear, The ring gear is 3 pieces sandwiched together. The Bendix only engaged the first (maybe the second also) layer of the ring gear, and it was too weak by itself. It began to bend and break the teeth on the inside layer of the 3 part ring gear. The bent and broken ring gear teeth chewed up the Bendix, and on and on.
It looks like with only 1 thrust washer on the jackshaft the Bendix and jackshaft will have more travel outwards and the Bendix will fully engage the ring gear.
Anybody seen this before?
Does it sound reasonable?
My 76 FLH has a bad grinding sound when I hit the starter. Upon tear down I found that the starter Bendix is very rough. Not the gear teeth, but the body of it where it would ride against the back side of the ring gear.
My question is - is there supposed to be something that limits the travel of the Bendix, so the it's body doesn't ride against the ring gear, or is it supposed to push all the way out against the ring gear?
FWIW - I have 2 thrust washers in place where the shaft goes into the outer primary cover. It came apart that way, so I've always put it back that way.
My question is - is there supposed to be something that limits the travel of the Bendix, so the it's body doesn't ride against the ring gear, or is it supposed to push all the way out against the ring gear?
FWIW - I have 2 thrust washers in place where the shaft goes into the outer primary cover. It came apart that way, so I've always put it back that way.
Last edited by Racepres; Sep 19, 2018 at 08:05 AM.
