Replacing stock primary chain tensioner
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Tourer
Joined: Oct 2009
Posts: 374
Likes: 15
From: Alberta, Canada
Replacing stock primary chain tensioner
Years and years ago, I replaced the stock primary chain tensioner with a Hayden M-6 because everybody else was doing it. Ha! It appears as though the springs have lost their 'springiness'. Decided to put the stock one back in. Practically brand new so not a problem. I could f'n swear that there were two spacers required for the stock tensioner that were not needed for the Hayden. My trusty manual doesn't mention them so I phoned the dealership. Gal behind the desk said 'no such thing'. Have I lost my mind? I'm only 62 but vividly remember handing the spacers to Pamela Anderson for safe keeping. Thanks for all replies!
Supporter
Joined: Jan 2007
Posts: 15,788
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From: along the shore of Mishigami
Just looked at Ronnie's parts drawing and their were no shims listed for the stock tensioner (p/n 39929-06B). Did you try to contact Hayden for the shims or new springs, I remember Hayden had a batch of springs too tall and I got the right ones with an e-mail.
Road Master
Joined: Dec 2010
Posts: 1,049
Likes: 264
From: Fresno Ca
There are two round spacers that have a locating lip that fit into the back side and then the bolts go through everything. Thats how my 09 is.
You remember them because they always fall out when you are trying to install it.
You remember them because they always fall out when you are trying to install it.
Last edited by cncmike; Aug 7, 2019 at 07:31 PM.
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Tourer
Joined: Oct 2009
Posts: 374
Likes: 15
From: Alberta, Canada
Yes to thinking that there were spacers between tensioner and inner case. Also heard that Hayden was very good about replacing too tall springs but haven't contacted them. The racket just started yesterday and I thought ...oh sheet...another compensator or inner primary bearing....efff..not the SE Clutch etc etc . Took the cover off and the polyethylene body of the Hayden was smackin off the primary housing causing a rat-a-tat-tat sound. I'll get back to you guys.
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From: Booming metropolis
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Tourer
Joined: Oct 2009
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From: Alberta, Canada
Yes, cncmike. The 'inner' side does have a lip. I'm guessing that both spacers are the same dimension.
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From: San Diego, CA
Do yourself a favor, junk the #39939-06A tensioner and pick up a new #39939-06B tensioner.
The "A" tensioner is the reason everybody was switching to the Hayden primary tensioner. It would frequently over tighten the primary chain, which would then lead to collateral issues with damage to bearings/seals in the primary and/or trans...
In this pic, the "B" is on top and the "A" is on the bottom... you can see the "B" just looks like a better piece... The "B" has a thicker base for less flex, smaller teeth for smaller adjustments, and the shoe portion only has a small section of teeth (unlike the "A" that had teeth all along the shoe base). These changes have pretty much fixed the over tightening problem..... there have been very few reports of an overtightened primary chain with the "B".... unlike the "A"...
PS- popular topic, that's the second time I've posted that primary tensioner pic tonight.....
The "A" tensioner is the reason everybody was switching to the Hayden primary tensioner. It would frequently over tighten the primary chain, which would then lead to collateral issues with damage to bearings/seals in the primary and/or trans...
In this pic, the "B" is on top and the "A" is on the bottom... you can see the "B" just looks like a better piece... The "B" has a thicker base for less flex, smaller teeth for smaller adjustments, and the shoe portion only has a small section of teeth (unlike the "A" that had teeth all along the shoe base). These changes have pretty much fixed the over tightening problem..... there have been very few reports of an overtightened primary chain with the "B".... unlike the "A"...
PS- popular topic, that's the second time I've posted that primary tensioner pic tonight.....
Last edited by hattitude; Aug 7, 2019 at 11:12 PM.
