Vibration after engine mount change..help!

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Aug 13, 2019 | 09:10 PM

#21

Cozz

Grand HDF Member

Joined: Oct 2015

Posts: 4,802

Likes: 6,884

From: Cincinnati OH.

Quote:

Originally Posted by HD Bobber

I’ve tried the Alloy Art on my ‘07 Street Glide as did my friend on his 2004 Road Glide at the same time....vibrations were unbearable on both! Windshield and fairing shook like crazy! Wanted to mention that the ‘04 RG has a build darkhorse S&S 106, so crank is spot on. We tried all sorts of aligning....in the end he put his old one back on.

i bought the glide pro and made things better, but not as good as I thought it would....felt better with stock one. 2,200-about 3,000 seems to be the worst.

Im not happy, but dealing with it.

When you installed the glide pro, did you ride the bike with all three bolts loose, to let the motor find it’s sweet spot? I didn’t do that at first. I just let the bike idle for a few minutes, then tightened the bolts. I wasn’t happy at all, so I called Jake. He said to ride the bike a few miles with the three bolts loose, then tighten. He was right. It made a big difference.

Aug 13, 2019 | 09:30 PM

#22

HD Bobber

Grand HDF Member

Joined: Sep 2010

Posts: 3,580

Likes: 215

From: Illinois

Did all that. First let it idle like you...didn’t do it. Then I loosened all 3 quite a bit and it made things better, but still not happy....maybe I did t ride it loose long enough. I don’t know, but shouldn’t be a science experiment. I’m frustrated with motor mounts and just dealing now.

Quote:

Originally Posted by Cozz

Aug 15, 2019 | 12:47 PM

#23

btsom

Grand HDF Member

Joined: Jan 2012

Posts: 4,445

Likes: 2,822

From: Oklahoma

Many have admitted to installing the motor mount upside down. Might not hurt to double check. With the nut removed from the center bolt (the one that the support tab from the engine goes through) the bolt should slide up and down easily. If it doesn't the mount is not centered under the tab and the side load transmits lots of vibrations. If the bolt slides up and down easily, the mount is centered and something else is causing the problem. The nut on the center bolt is self locking and should only be tightened until snug, not tight. If the nut has been turned down too far, much of the cushion movement in the mount may be squeezed away..

Jan 30, 2021 | 01:25 AM

#24

Roby A

Stage II

Joined: Jan 2021

Posts: 2

Likes: 0

From: Kuwait

Good Idea and resalable one,

I will try it today, as I got the vibration problem 2 days back after replacing the mount on my 2003 Anniversary Electra Glide

Thanks for the info ...

Feb 3, 2021 | 01:47 AM

#25

Roby A

Stage II

Joined: Jan 2021

Posts: 2

Likes: 0

From: Kuwait

I tried it last week, vibration transferred from 2000 rpm to 3000 rpm,
I still not satisfied, as the vibration appears at about 3000 rpm and start disappeared at 4300 rpm,
Looks I have to spend more time on keeping the bracket bolts and nuts loose,
I will Let the engine take time by riding 300 to 400 miles, I will tie the threads by small thin plastic belts so the loosed nuts will not full down ( very important as the Original HD spare parts are very expansive in Kuwait)
I like the idea saying - Let the engine find its sweet point and then tight the bolts smoothly when the engine is running,
Please keep safe and take care of all safety procedures and keep your hands away from the hotttt engine

Feb 3, 2021 | 01:27 PM

#26

hattitude

Seasoned HDF Member

Joined: Sep 2008

Posts: 14,075

Likes: 11,096

From: San Diego, CA

Quote:

Originally Posted by Roby A

Good Idea and resalable one,

I will try it today, as I got the vibration problem 2 days back after replacing the mount on my 2003 Anniversary Electra Glide

Thanks for the info ...

Obviously there could be many reasons for the engine vibration, but since you noticed the vibration after changing your front engine mount, here's a little history...

Your original front engine mount was probably part #16207-79B. They are currently using a newer updated part #16207-79D...

As the parts are updated with a new letter suffix... it could be for several reasons.. One reason for the change, is that they changed manufacturer. Often that is done to save $$$, and the then the quality goes down, or at least changes...

There have been many complaints by people with older Electra Glides that had a "B" front mount OEM, that develope vibration problems when they switch to the new "D" front mount. Many believe it's because the newer version is a stiffer mount, which transfers more vibration....

For what it's worth.... I read about this on Harley Tech Talk ..

A company called Barry Controls USA, distributed by Novibration.com, makes a bonded tube mount (technical name for the mounts used by MoCo for this application), that is the same as the original HD OEM front engine mount... It is their #507-1NS mount. They also make a #507-2NS that is slightly stiffer, if you find the 1NS too soft for your particular application (ie: big bore or high performance application). They are only like $20... but the shipping can be high here in the US ($20 shipping for an $18 dollar part). Yet they are still cheaper here, than the HD part from a dealer.... Living in Kuwait, the shipping charges may be a deal breaker for you....

Anyways, their #507-1NS bonded tube mount, is a believed to be a duplicate of the original HD #16207-79B front engine mount that everybody seemed to like better than the newer, softer version...

https://novibration.com/product/bond...eries-507-1ns/

Good luck with your vibration fix...

Last edited by hattitude; Feb 3, 2021 at 01:49 PM.

Feb 3, 2021 | 05:13 PM

#27

roussfam

Seasoned HDF Member

Joined: Jan 2009

Posts: 12,656

Likes: 8,261

From: Ottawa, Ontario

Checked out the link, no mention of HD fitment. Do you have a link to the thread you read this on by any chance?

Never mind, looks like they don't ship to Canada

Last edited by roussfam; Feb 3, 2021 at 05:16 PM.

Feb 3, 2021 | 07:27 PM

#28

hattitude

Seasoned HDF Member

Joined: Sep 2008

Posts: 14,075

Likes: 11,096

From: San Diego, CA

Quote:

Originally Posted by roussfam

Checked out the link, no mention of HD fitment. Do you have a link to the thread you read this on by any chance?

Never mind, looks like they don't ship to Canada

Not sure if I can put a link to another forum in here.... usually it's against the rules..

But here is one post from that thread by from someone who called Novibration.com to find out if the #507-1NS & #507-2NS mounts work on a Harley..

"OK I talked to John at Novibration.com. (Distributor for Barry Controls) Which is now owned by Hutchinson Aerospace Industries.
1 817 453 1100 ext 106. He is in engineering. Real nice guy and very knowledgeable.
Asked about the application for the early touring bikes and he was very familiar with it.
He said the code 1 was the original mount used.
He said the code 3 would be substantially stiffer and more apt to transfer vibrations."

A couple of the guys bought various versions of the mount- #507-1NS, -2NS, -3NS, & -4NS to try them out. Their discussion is ongoing and looks like these definitely fit, and the 1NS or 2NS may be as good as the old "B" mounts...

Other excepts from the discussion...

"I have. #2, #3 and #4.
As expected, #4 transmitted more vibrations that what I have experience from a Harley labeled unit. Likewise #2 was silky smooth, but allowed the engine (TC124 11.9 Compression) to bounce around. I really dont care about the bounce but the exhaust pipe was tapping on a foot control.
#3 was just about perfect and is what I put back in after trying the #4 for 400-ish miles. I am probably going to buy about a dozen #3 and maybe four #2. Might put a #2 in my bone stock bagger when the time comes."

" Thanks for the update. If a #3 was about perfect for your 124 motor, then maybe a 1 or 2 for a moderately modified 80"?"