Some Basic Questions.....Horrendous Vibration
Stellar HDF Member
Joined: Jan 2013
Posts: 2,721
Likes: 103
From: St. Louis, MO
Can you rev the engine to 2500 or so which is your vibration range in neutral on the stand, set the throttle stop and look really closely at the engine mounts to see if you find anything amiss?
Thread Starter
|
Supporter
Joined: Oct 2015
Posts: 1,170
Likes: 32
From: Ft.Worth, Texas
OK, I'll give it a try. I never did find the "thingys' in the rear they were talking about. The swing arm bushings look good though. Always something on these old bikes.... Wouldnt trade it for a new one though.
Seasoned HDF Member
Joined: Aug 2007
Posts: 8,195
Likes: 3,085
From: NW AR
Swing arm bushing thingies behind the passenger floor board mounts. Those, the top mount and the front mount are what hold the drive train in place.
I had a shovelhead that would shake something fierce at like 63 MPH. Upper motor mount was cracked in half. You couldn't see it under the tanks.
I had a shovelhead that would shake something fierce at like 63 MPH. Upper motor mount was cracked in half. You couldn't see it under the tanks.
Thread Starter
|
Supporter
Joined: Oct 2015
Posts: 1,170
Likes: 32
From: Ft.Worth, Texas
If I were to shim my current motor mount to raise it a little, would that help any if the mount is sagging? Maybe as a test before shelling out $60.00 ?
Stellar HDF Member
Joined: Aug 2012
Posts: 2,664
Likes: 184
From: Indiana, USA
Replace the soft worn out front rubber you have already removed with a new firm OE replacement. Not saying it will solve the vibration however you already have that 27 year old piece of rubber out and it would be a shame to bolt it back in just to replace it in a month or 20.
Road Warrior
Joined: Oct 2011
Posts: 1,376
Likes: 36
From: Round Rock, TX
Replace the soft worn out front rubber you have already removed with a new firm OE replacement. Not saying it will solve the vibration however you already have that 27 year old piece of rubber out and it would be a shame to bolt it back in just to replace it in a month or 20.
Road Master
Joined: Jan 2012
Posts: 856
Likes: 9
From: North Carolina
I replaced my front mount and over time the two front bolts came loose and one lost the nut completely. It vibrated bad like that. Once I fixed it it calmed way down. A loose or broken engine mount vibrates but good.
HD Forum Stories
The Best of Harley-Davidson for Lifelong Riders
8 Best Harley-Davidson Motorcycles Ever
Pouria Savadkouei
10 Worst Harley-Davidson Motorcycles Ever
Pouria Savadkouei
Killer Custom's Jail Break Is The Breakout That Refused to Blend In
Verdad Gallardo
Crazy Bunderbike Build Looks Amazing, But Is It Impossible to Ride?
Verdad Gallardo
Harley-Davidson Reveals Super Cool Cafe Racer Concept
Verdad Gallardo
Engraved Rebellion: Inside Bundnerbike's Glam Rock II
Verdad Gallardo
10 Motorcycles You Should Never Buy
Joe Kucinski
10 Things Harley-Davidson Needs to Fix in 2026
Verdad Gallardo
Southpaw Super Glide: A Left-Hand-Drive 1979 Harley FXE Built to Fit the Rider
Verdad Gallardo
Ultimate HDF Member
Joined: May 2006
Posts: 6,590
Likes: 444
From: Ohio
Ultimate HDF Member
Joined: May 2006
Posts: 6,590
Likes: 444
From: Ohio
Damn...... I just ran across this:
https://www.hdforums.com/forum/evo-c...brate-but.html
What's taking so long?
https://www.hdforums.com/forum/evo-c...brate-but.html
What's taking so long?
Thread
Thread Starter
Forum
Replies
Last Post