Inside my Primary.....WTF?(PICS)
Summary of what I think I read:
The original HD auto adjuster on 06 Dynas and 07-? all other models had some issues with either going to tight or not tightening enough. The revised model 39929-06A is better.
The first production units of the SOHB wedge were made poorly. It has been updated, and is now better?
Does that about cover it?
From what I have heard, the only change with the updated SOHB is that they put the oil hole on the side of the wedge, instead of the front. I have not heard from anyone who has run the new version. However, I was able to "fix" my older version and have had a successful season with it.
The problem with it was that it would close too far (loose chain position), and it would bind in that position. It would actually get stuck there. I added a small spring from Ace hardware behind the wedge to keep it from reaching that position.
It works perfectly now.

The length of the spring is short enough, to put zero tension on the wedge when it's in it's "home" position. It is not adding to the primary chain tension.
But it is preventing the wedge from going backward too far. I am very pleased with the results.
If I were to buy the improved version, I would still toss a spring in there (can't hurt).
Also, it will never "ratchet up" into a too tight position, like the stock tensioner.
Oh...I switched to the SE clutch spring at the same time. LOVE IT!! Tougher pull but you get used to it quickly.
The Best of Harley-Davidson for Lifelong Riders
From what I have heard, the only change with the updated SOHB is that they put the oil hole on the side of the wedge, instead of the front. I have not heard from anyone who has run the new version. However, I was able to "fix" my older version and have had a successful season with it..
If I were to buy the improved version, I would still toss a spring in there (can't hurt).
Also, it will never "ratchet up" into a too tight position, like the stock tensioner.
Feel free to PM me anytime.






