Dyna forks
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3rd Gear
Joined: Jul 2012
Posts: 7
Likes: 0
From: Alameda, Ca.
Dyna forks
I have a 06 dyna street bob, I changed the fork oil to HD SE. The forks "bang" when I hit a bump. it seems like it bangs on rebound. I put in the right amount of oil. are the Harley springs junk? I have 52,000 miles on the bike. I am a light rider, 140 lbs. should I switch back to the lighter oil? It clunked with the stock oil too. What's up??
Stellar HDF Member
Joined: Aug 2009
Posts: 3,212
Likes: 212
Are the forks actually bottoming out? That would be pretty rare except in hard bumps.
It's more likely your neck bearing/washer. Harley put out a service bulletin (M-1215), and your year is covered under this. Has the upgrade been done? If I recall correctly, the main symptom was a front end clunk.
You can access the tech bulletin in this thread:
Service Bulletin M-1215
It's more likely your neck bearing/washer. Harley put out a service bulletin (M-1215), and your year is covered under this. Has the upgrade been done? If I recall correctly, the main symptom was a front end clunk.
You can access the tech bulletin in this thread:
Service Bulletin M-1215
Seasoned HDF Member
Joined: Jul 2008
Posts: 9,278
Likes: 1,138
From: southeast PA
Go back to the stock oil and see if the problem is still there. I put in Progressive fork springs and used the SE oil but didn't like how the front end responded. Put back the stock oil and it's fine. The explanation I got was that the heavier oil won't let the forks react as fast as with stock stuff.
Ultimate HDF Member
Joined: Jul 2011
Posts: 5,477
Likes: 5
From: New Braunfels, Texas
do some search on setting up the proper sag for your weight. i think you are hitting the top on the rebound because you are too light. Maybe try cutting the spacer down a half of inch
Ultimate HDF Member
Joined: Jul 2011
Posts: 5,477
Likes: 5
From: New Braunfels, Texas
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Ultimate HDF Member
Joined: Jun 2010
Posts: 5,105
Likes: 16
From: Blaine, WA
ah - so he did........but an 06, maybe someone left them out or put them in wrong, only thing I can see that would cause a bang on rebound.
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