Diagnosing 2011 FXDB issue
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Tourer
Joined: Jul 2009
Posts: 360
Likes: 14
From: Albuquerque NM
Diagnosing 2011 FXDB issue
Just got the bike(2011 FXDB, with 42K on the odometer, replaced the motor mounts "amazon", now when i hit a bump it sounds like it is bottoming out. Also, when i hit the rear brakes the bike shudders not a brake shudder, but a seat of your pants shudder. Anyone have any ideas.
Seasoned HDF Member
Joined: Dec 2009
Posts: 9,162
Likes: 1,906
From: Doghouse... mostly
Check the gas tank bolts, front and rear, to see if that stops the bottoming out sound. Check the brake pads on the rear first, if they're okay see if the rotor needs to be replaced.
Seasoned HDF Member
Joined: Jul 2008
Posts: 9,281
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From: southeast PA
Look at the mount to see if any of the rubber is damaged or if the mount wasn't shimmed correctly.
Sometimes the tank bolts don't need more than a slight tightening, so use a socket or a wrench on them.
Advanced
Joined: Dec 2017
Posts: 54
Likes: 37
From: North Carolina
My previous bike was an 06 Superglide. When I bought it in 2017 the front motor mount was shot. I thought I’d be proactive and change both. Front went on without any problems. Rear mount was on backorder from JP, so I rode for about a month with just the new front mount. What a difference! Less overall vibes and rode well.
When the rear mount arrived, it was a PITA to install. Seemed like it didn’t line up right, no matter what I did. Finally got it installed and had the same symptoms as you. Swapped the old mount back in and never looked back. Ran fine til the day I sold it.
If the other posts’ suggestions don’t fix it, maybe you could reinstall the old mounts, one at a time, to see if you can isolate the issue.
When the rear mount arrived, it was a PITA to install. Seemed like it didn’t line up right, no matter what I did. Finally got it installed and had the same symptoms as you. Swapped the old mount back in and never looked back. Ran fine til the day I sold it.
If the other posts’ suggestions don’t fix it, maybe you could reinstall the old mounts, one at a time, to see if you can isolate the issue.
Thread Starter
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Tourer
Joined: Jul 2009
Posts: 360
Likes: 14
From: Albuquerque NM
oh well, just went to get them out of the trash....too late. At least Amazon is taking the Chinese ones back
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Stellar HDF Member
Joined: Feb 2013
Posts: 3,072
Likes: 1,727
From: Dallas, Texas
I recommend the front and rear motor mounts from Drag Specialties, really firm, hard rubber. Got 4 years and no deterioration. I'm also using DS rear motor mounts in my Wife's 04 Sportster.
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