Front Motor Mount Replacement
Club Member
Joined: Jun 2007
Posts: 45,429
Likes: 2,898
From: Bedford UK
I put an Alloy Art poly front motor mount on my FXR when I put the new 131 in and it definitely has more vibration, not sure if that's due to the new motor Im still breaking in or the stiffer mount, but I have about 100 miles on it now and it didn't smooth out. I did a similar sequence installing it as mentioned above. I think I might just get a new oem rubber mount and swap it out
Thread Starter
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Cruiser
Joined: Sep 2017
Posts: 156
Likes: 21
From: Adirondacks
To close out this saga on my end, I replaced the Biker's Choice mount with the original after inspecting it. The excessive vibration went away immediately and the bike is a joy to ride again. I'll follow the recommendation of Texashillcountry and Gbrown above when it's time to replace the mount and go OEM. I rode with the Biker's Choice mount for at least 200 miles and it would still shake the heck out of the bike at 1200RPM and was pretty rough through 200-2500RPM. Didn't seem like it eased up a bit. Put in more time than I wanted on this but learned a quite a bit in the process.
Thanks to all for your help.
Frank
Thanks to all for your help.
Frank
Road Master
Joined: May 2018
Posts: 783
Likes: 179
From: Bay Area
grbrown - I have the Ultima 131 with roughly 150-200 miles on it now. It is f*ckin flat out violent around the 2000-2800 range then smooths out after 3k. Rough enough that it started stressing the FXRT lower fairings mounted to the upper. Im picking up an OEM mount today for another $80 dam dollars and will swap out this Alloy Art tonight to see. I introduced so many variables that its hard to determine whats causing what since its a frame up build so Im hoping its just the mount at this point and not just a beast of a motor.
Road Master
Joined: May 2018
Posts: 783
Likes: 179
From: Bay Area
Just to report back my findings. I stopped by the local HD and picked up a new motor mount which is item number 16207-79. Ok so pay attention here, this has been redesigned and the old style in most parts books for FXR ends with a "B" the one being sold now ends with a "D". IF you buy a new one pay attention to the number you get as they mount differently. I have added a picture to show you each and what the redesigned one looks like upright so make sure you don't put it in upside down.
Back to the point, took my Alloy Art mount out and put the new "D" version OEM rubber mount in.............. holy Sh*t! Night and day difference. No more violent rattles or vibrations from 2-3K. Smooth as butter. There is slight roughness around 1500-1800 but that could be various things, new motor still breaking in, not tuned yet so could be sputtering, could just be bogging the big motor down too much, etc. But really who cares. 95% of the time in motion you should be above 2K rpm anyways. So if you put a new poly type mount in and cant take the rattles go back to OEM, or if you have a new OEM and it shakes make sure its in there properly as I read last night even some dealerships were putting the "D" mounts in upside down as habit.
Back to the point, took my Alloy Art mount out and put the new "D" version OEM rubber mount in.............. holy Sh*t! Night and day difference. No more violent rattles or vibrations from 2-3K. Smooth as butter. There is slight roughness around 1500-1800 but that could be various things, new motor still breaking in, not tuned yet so could be sputtering, could just be bogging the big motor down too much, etc. But really who cares. 95% of the time in motion you should be above 2K rpm anyways. So if you put a new poly type mount in and cant take the rattles go back to OEM, or if you have a new OEM and it shakes make sure its in there properly as I read last night even some dealerships were putting the "D" mounts in upside down as habit.
Last edited by Jake707; Sep 19, 2018 at 12:00 PM.
Road Master
Joined: May 2018
Posts: 783
Likes: 179
From: Bay Area
No Idea why my attached picture isn't showing as it showed uploaded but here is a URL, maybe that will work
https://i.imgur.com/yCU8MR3.png
https://i.imgur.com/yCU8MR3.png
Banned
Joined: May 2018
Posts: 4,576
Likes: 978
From: Viet Vet, crossroads
I have found none of the EVO mounts are good much longer than 5 years.
At that time they are ready for the trash.
The swing arm is sagging and it all need to be refreshed.
In fact, the swing arm inside bushing get egg shaped from just sitting there,
Oh I know-Some here will say they last a lot longer...and yes you can put up with the misery lot longer if you like.
AT the same time they are complaining about a bike that drives like it has a drunken mind of its own.
At that time they are ready for the trash.
The swing arm is sagging and it all need to be refreshed.
In fact, the swing arm inside bushing get egg shaped from just sitting there,
Oh I know-Some here will say they last a lot longer...and yes you can put up with the misery lot longer if you like.
AT the same time they are complaining about a bike that drives like it has a drunken mind of its own.
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Seasoned HDF Member
Joined: Jul 2011
Posts: 27,097
Likes: 4,676
From: Frozelandia, Minnysota
Thanks for the D model mount info, I hadn't heard about that and will changing out a '96 soon, good to know. I was thinking about one of the American made poly mounts, but sounds like this time OEM is better.
Cruiser
Joined: Dec 2013
Posts: 154
Likes: 75
From: Sweden