The Haden tensioner I had in my 1989 Ultra Classic was good for about 120,000 miles. Then I sold the bike.

 

hayden spring broke, then baker bent,
hayden with improved spring back in.

 

Baker now offers an upgrade to their original chain adjuster. I ordered the upgrade at their booth in Sturgis. I think they offered a nice 15% discount if you purchased any of their items at the rally. One nice thing about the upgrade is that it comes with a new shoe. So, one can run with the original unit and if/when the shoe wears out, install the upgrade.
Baker Armored Attitude Adjuster

 

yes lookout correct, mine was the old one. took an in-store credit and put my hayden In with new spring...for now??

 

Baker Attitude Adjuster won't fit a 95 bike.

 

For you cats wanting pics. Here ya go. A couple of views. If you can make out what this mangled piece of aluminum is more power to ya. Pic of pressure plate with aluminum particles. I pulled and cleaned plates. Gonna change chain out with a spare one I have. And. Go with stock adjuster.

 

When you go back to the stock box style tensioner make sure that you don't torque the bottom 1/4 inch bolts too tight or the plastic could split / crack. Refer to the manual. I even go a little lighter.

 

The photos suggest improper install rather than a design issue. I wouldn't blame Haden at all.

 

As you say, I can't make out what those parts started out life as! Doesn't look anything like my M6, which is mostly steel and a big chunk of moulded white plastic.