Inside my Primary.....WTF?(PICS)
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Ultimate HDF Member
Joined: Dec 2006
Posts: 8,294
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From: Po-Dunk Looziana
Brad
The Southern Oregon Hot bike tensioner looks extremely close in design as the new (A) revision from Harley
Here is a small pic from Southern Oregon Hot Bikes website:
Looks very close with the advantage going to the HD one IMO with "TEETH" visible on the ratchet portion of the HD one and none visible on the SOHB one, at least on the 2007-2009 SOHB offering?
Although I'm no Engineer, I did sleep at a Holiday Inn Express last night and have been wrong more times than right.
Thanks for the info! I'm going to put some miles on this one and see if I continue with the desired results I've felt thus far.
The Southern Oregon Hot bike tensioner looks extremely close in design as the new (A) revision from Harley
Here is a small pic from Southern Oregon Hot Bikes website:
Looks very close with the advantage going to the HD one IMO with "TEETH" visible on the ratchet portion of the HD one and none visible on the SOHB one, at least on the 2007-2009 SOHB offering?
Although I'm no Engineer, I did sleep at a Holiday Inn Express last night and have been wrong more times than right.
Thanks for the info! I'm going to put some miles on this one and see if I continue with the desired results I've felt thus far.
Last edited by UltraKla$$ic; Dec 21, 2009 at 10:09 AM.
Elite HDF Member
Joined: Sep 2006
Posts: 3,718
Likes: 11
From: Punta Gorda,FL
I can see that the new spine is thicker and has finer and more teeth per inch, but the new adjustment block has only a small section at the rear with teeth.
What do you do with the aft metal tab that sticks down and outside of the primary case?
Tom
What do you do with the aft metal tab that sticks down and outside of the primary case?
Tom
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Ultimate HDF Member
Joined: Dec 2006
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From: Po-Dunk Looziana
Originally Posted by tmitchellofPG
I can see that the new spine is thicker and has finer and more teeth per inch, but the new adjustment block has only a small section at the rear with teeth.
I noticed that too, but my speculation is that the beefier spine will prevent flexing moreso than more teeth on a thinner spine in relation to surface tension and area? I can't be for sure because I am not an Engineer or Physicist.
What say you? Whatcha think?
I can say without a doubt I feel a positive difference having the new one on versus the older version in shifting and sound(lack of) resonating from the primary.
Last edited by UltraKla$$ic; Dec 21, 2009 at 10:28 AM.
Seasoned HDF Member
Joined: Jun 2006
Posts: 28,549
Likes: 3,954
From: Vermont
Brad
The Southern Oregon Hot bike tensioner looks extremely close in design as the new (A) revision from Harley
Here is a small pic from Southern Oregon Hot Bikes website:
Looks very close with the advantage going to the HD one IMO with "TEETH" visible on the ratchet portion of the HD one and none visible on the SOHB one, at least on the 2007-2009 SOHB offering?
Although I'm no Engineer, I did sleep at a Holiday Inn Express last night and have been wrong more times than right. Thanks for the info! I'm going to put some miles on this one and see if I continue with the desired results I've felt thus far.
The Southern Oregon Hot bike tensioner looks extremely close in design as the new (A) revision from Harley
Here is a small pic from Southern Oregon Hot Bikes website:
Looks very close with the advantage going to the HD one IMO with "TEETH" visible on the ratchet portion of the HD one and none visible on the SOHB one, at least on the 2007-2009 SOHB offering?
Although I'm no Engineer, I did sleep at a Holiday Inn Express last night and have been wrong more times than right.
Thanks for the info! I'm going to put some miles on this one and see if I continue with the desired results I've felt thus far.It is similar to the HD one. The thing with the SOHO one is that the wedge keeps constant pressure on the chain as it rides over it whether it be going up or down. The HD one has the teeth so if it ratchets up, it can't go back down if needed. If you look at a picture on the SOHO site in motion you can see the wedge moving back and forth. If the chain were to happen to have a loose spot or a tight spot, the wedge continually compensates one way or another. I am planning on going with the wedge to give it a shot.
Last edited by dawg; Dec 21, 2009 at 10:55 AM.
Road Warrior
Joined: Mar 2008
Posts: 1,783
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From: Oh
Well, I had my Primary cover off while waiting on chrome bolts fromGardner-Wescott to replace the ugly Zinc bolts and I begin to investigate what I thought was chain slop. I enjoy wrenching on my bike and don't mind finding things I can improve on so in my quest to fix what isn't broke I discovered the primary chain tensioner of previous is a weaker design than what is available now. SAY WHAT??
Yep, the chain tensioner has been beefed up for what I would presume to prevent flexing and the "ratcheting" possibly slipping allowing the chain to have more undesirable slack.
Speculation?
Probably. But to say there was ever/never a problem is taboo and most shops would scoff at the presumption.
Make of it what you will, but I've "fixed" my chain from being so loose, but not being piano string tight either. Here is what I've found as a possible additional "fix" to a noisy primary to some and what others would call "NORMAL"...lol:
Old Primary Tensioner:
New Primary Tensioner:
See the difference in the bottom "spine"? #1 vs #2 in the pic?
A noticeable difference in the increase in strength via change in design.
Pic of the box and part #:
While I was in the Primary, I also changed out my clutch spring for a little heavier application. I've never cared for the way the bike would take off loaded 2 up once warmed up and found no resolution with continual clutch lever adjustment via correct setting procedure, nor resolution with different fluid usage
so when I built my motor up, my quest for a littler heavier spring was on. I didn't want a substantial increase in lever pull, just a bit more bite when loaded and fluids hot. I have found my answer thanks to this thread HERE:
The 37871-98 spring is a reported 145KgF vs the OEM spring 37882-06 of 117KgF with the SE Spring 37951-98 @ 175 KgF. The 37871-98 put the pull effort in the middle between OEM vs SE and to reiterate I did not want the additional pull effort that the SE spring has especially when caught in stop and go traffic.
Here is the 37871-98
There is a 37871-98(A) available now that succeeds the -98. The only thing we could find out at the Harley dealership being the difference between the -98 and -98A is that there was a price increase with no difference in construction.
Therefore, presumably the 37871-98 and the 37871-98A are the same spring.
Concluding, the bike now shifts with a much smoother feel and developed a stronger "attitude" between shifts. Take off's no longer require an effort and it's shifting is precise, smooth, and a much more natural feel, one of which I've longed for and through diligence have acquired.
The contribution in resolving MY aforementioned issues is likely due to the addition of the combination of fixing those things that weren't broke to start with in keeping with forum etiquette, which afterall, is why I own a Harley in the first place!
Merry Christmas!
Yep, the chain tensioner has been beefed up for what I would presume to prevent flexing and the "ratcheting" possibly slipping allowing the chain to have more undesirable slack.Speculation?
Probably. But to say there was ever/never a problem is taboo and most shops would scoff at the presumption.Make of it what you will, but I've "fixed" my chain from being so loose, but not being piano string tight either. Here is what I've found as a possible additional "fix" to a noisy primary to some and what others would call "NORMAL"...lol:
Old Primary Tensioner:
New Primary Tensioner:
See the difference in the bottom "spine"? #1 vs #2 in the pic?
A noticeable difference in the increase in strength via change in design.
Pic of the box and part #:
While I was in the Primary, I also changed out my clutch spring for a little heavier application. I've never cared for the way the bike would take off loaded 2 up once warmed up and found no resolution with continual clutch lever adjustment via correct setting procedure, nor resolution with different fluid usage
so when I built my motor up, my quest for a littler heavier spring was on. I didn't want a substantial increase in lever pull, just a bit more bite when loaded and fluids hot. I have found my answer thanks to this thread HERE:The 37871-98 spring is a reported 145KgF vs the OEM spring 37882-06 of 117KgF with the SE Spring 37951-98 @ 175 KgF. The 37871-98 put the pull effort in the middle between OEM vs SE and to reiterate I did not want the additional pull effort that the SE spring has especially when caught in stop and go traffic.
Here is the 37871-98
There is a 37871-98(A) available now that succeeds the -98. The only thing we could find out at the Harley dealership being the difference between the -98 and -98A is that there was a price increase with no difference in construction.
Therefore, presumably the 37871-98 and the 37871-98A are the same spring.Concluding, the bike now shifts with a much smoother feel and developed a stronger "attitude" between shifts. Take off's no longer require an effort and it's shifting is precise, smooth, and a much more natural feel, one of which I've longed for and through diligence have acquired.
The contribution in resolving MY aforementioned issues is likely due to the addition of the combination of fixing those things that weren't broke to start with in keeping with forum etiquette, which afterall, is why I own a Harley in the first place!
Merry Christmas!
So would my 08' SG have the 37871-98A spring in it as OEM? I am building a 103" high compression engine and am wondering what spring to put in for the added torque.
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From: The Internet (& Dyer, Indiana)
Are you talking about the HD ramp kit? If so, it already comes on the 06 and up.
Ultra, thanks for the write-up! I am 99% sure that my 08 has the older looking version that you have pictured. (not the "A"). I was in there for the SE Compensator install.
I was planning on trying out a hydraulic one this spring.
Ultra, thanks for the write-up! I am 99% sure that my 08 has the older looking version that you have pictured. (not the "A"). I was in there for the SE Compensator install.
I was planning on trying out a hydraulic one this spring.
Grand HDF Member
Joined: Mar 2007
Posts: 4,928
Likes: 285
From: Edmond Oklahoma
Well, I may have to try out that Southern Oregon tensioner on my 09 SG. The primary is the loudest part of my bike, its loud and clear at 70mph. I've taken it to the shop twice and they say its normal, but my 02 Road King was never that loud unless it needed adjusting. I can't hear the top end clatter because of it.
Beary
Beary
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Joined: Sep 2009
Posts: 7,580
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From: The Internet (& Dyer, Indiana)
No. The 98a spring went as far as 03, then they started making them softer. You have the softest spring HD has offered so far.