primary chain adjustment

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Mar 6, 2017 | 02:14 PM

#11

splattttttt

Ultimate HDF Member

Joined: Jul 2014

Posts: 5,649

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From: MASS_hole

I'll be. He king the chain in 7k mi
if it seems the slightes bit off on the tight. That adjuser's goin to the dump

Mar 7, 2017 | 08:40 PM

#12

1harleyman

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Joined: Jun 2012

Posts: 69

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From: ohio

Did anyone catch the part in my post about the wear mark from the chain on the casting under the front sprocket , I tried to but couldnt make the chain come close to raising off the sprocket not to mention moving the 1/2 in. it would take to hit the casting

Mar 8, 2017 | 08:02 AM

#13

U-234

Road Warrior

Joined: Jan 2009

Posts: 1,489

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From: East of Tulsa

The wear mark could have been from previous owner. Sudden acceleration and sudden deceleration causes chain slack at the drive sprocket. I think that's why some people have problems with the auto adjuster. Especially those that have hopped up their engines. Then there is the possibility of chain stretch on your bike.

Nov 3, 2020 | 11:20 AM

#14

panz4ever

Seasoned HDF Member

Joined: Oct 2005

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From: Santa Klaus County, Cali

Gappy just looking again at this thread. Couple of questions for you. The order of assembly on the inner primary is that you first bolt the inner primary to the engine case. Second, the transmission case should have the 5 bolts on the bottom (one to the frame, 4 to the tranny plate) loosened. Third, the nuts on the four studs get tightened. Fourth, the bottom five nuts get tightened.

Only reason I mention this is that I wonder if the inner primary is flush against the tramnsmission and if maybe this was contributing to the the alignment problem.

Have you had the chance to look at the alignment procedures in the manual yeat?

Nov 6, 2020 | 06:40 AM

#15

Tampa Fatboy

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Joined: Feb 2012

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From: Sunshine State

Never cared for the auto adjusters on the primary chain. To me that was part of the maintenance when you changed fluid.
'06 or '07 when they got rid of the manual adjust?

Nov 7, 2020 | 10:08 AM

#16

60Gunner

Grand HDF Member

Joined: Sep 2017

Posts: 4,359

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From: Dubuque, IA

The auto adjusters are for those too lazy to adjust it or even check it. I'm going to open my '13 back up and put a manual in. Shoulda done it when I did the 30 tooth solid sprocket from Evolution Industries that comes with a new chain. I just don't trust the pos auto adjuster from tightening up too much with my riding style.
Probably why there's such a wide spread issue with bearings. Something that wasn't an issue with manual adjusters.

Nov 7, 2020 | 09:39 PM

#17

hattitude

Seasoned HDF Member

Joined: Sep 2008

Posts: 14,205

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From: San Diego, CA

Old thread, but FWIW....

The early chain tensioners were problematic when they came out in 2006 on a couple models, then 2007 on all models, part #39929-06A.

They upgraded the part in 2010 to #39929-06B. They made several changes. While the newer version didn't make the auto tensioner bullet proof, there were far fewer issues with it over tightening the primary chain. As mentioned, driving style can exacerbate the issue..

Here is a pic of the two different part numbers together for comparison. The newer version is on the top...

Nov 8, 2020 | 09:11 PM

#18

megawatt

Road Warrior

Joined: Dec 2007

Posts: 1,286

Likes: 64

From: SoCal

In your first post, the second picture shows the crankshaft sprocket shaft.
There is very little spline showing.
Is that all the spline that is exposed when the compensating sprocket pieces are removed?
I does not look like sufficient spline for the compensating sprocket shaft extension to engage.
How can it handle the torque with so little engagement?