Go Back   Motorcycle Forum > Manufacturer Forums > Harley Davidson

Reply
 
Thread Tools
Old 08-15-2008, 12:51 PM   #1
shvlhead66
Registered Member
 
Join Date: Aug 2008
Posts: 1
Default FLH Wobble

Restored a 66FLH and now experience a wobble at about 50 mph. Bike was completely rebuilt, swingarm bushings, seals, front forks, new Avon tires. Everything set to specs as original manual. Bike has the original Star front hub which was rebuilt. Wheels machined balanced.
Rims within tolerances for radial and lateral runout. Front/rear wheel in alignment. I miss something? Any help is appreciated.
shvlhead66 is offline   Reply With Quote

Sponsored Links Remove Advertisements
Motorcycle Forum
Advertisement
Old 08-15-2008, 01:01 PM   #2
Buzglyd
Founding Member
 
Buzglyd's Avatar
 
Join Date: Nov 2001
Posts: 10,904
Default

Quote:
Originally Posted by shvlhead66 View Post
Restored a 66FLH and now experience a wobble at about 50 mph. Bike was completely rebuilt, swingarm bushings, seals, front forks, new Avon tires. Everything set to specs as original manual. Bike has the original Star front hub which was rebuilt. Wheels machined balanced.
Rims within tolerances for radial and lateral runout. Front/rear wheel in alignment. I miss something? Any help is appreciated.
You didn't know the Wobble (TM) is a trademarked Harley feature?
Buzglyd is offline   Reply With Quote
Old 08-15-2008, 01:11 PM   #3
longride
Super Duper Mod Man

 
longride's Avatar
 
Join Date: Nov 2001
Location: Anywhere they let me
Posts: 10,479
Default

I had an 82 that wobbled at 45. At 40 it was gone and at 50 it was gone. I tried everything to get rid of it, but it was still there. My suggestion is don't ride at 50 and you won't notice it.
__________________
I'm a knucklehead
longride is offline   Reply With Quote
Old 08-15-2008, 01:27 PM   #4
sarnali2
Aging Cafe` Racer

 
sarnali2's Avatar
 
Join Date: Jun 2007
Location: Sittin' down by my window, lookin' at the rain.
Posts: 8,719
Default

Did you put a Batwing or windshield on there? I had to be careful with my '80 FLHP to get the fairing as even as I could when I put it on or it would get a wobble, also some tires tend to hunt on some road surfaces, that could get it going too. Over or under inflation can do it.....even a loose dry or worn primary or rear chain can get some weird handling quirks. Hard to say..
__________________
"Carpe` Throttelum -Loud Suits Save Lives"

"He said he's farting because of his medication"...

Last edited by sarnali2 : 08-15-2008 at 01:30 PM.
sarnali2 is offline   Reply With Quote
Old 08-18-2008, 10:17 AM   #5
pushrod
Founding Member
 
pushrod's Avatar
 
Join Date: Nov 2001
Location: Baja 'Bama
Posts: 3,642
Default

Check the head bearing torque, too. Too much is bad, too little is bad.

I'm assuming you mean 'wobble' as in, the handlebars move try to move in your hands, as opposed to 'weave', where the bike wnats to wander back and forth.
__________________
You would not understand,
this is not how I am...

I have become -
Comfortably Numb.
pushrod is offline   Reply With Quote
Old 08-18-2008, 12:19 PM   #6
Neal
Founding Member
 
Join Date: Nov 2001
Posts: 730
Default

Steering head bearing?
Neal is offline   Reply With Quote
Old 08-18-2008, 01:04 PM   #7
pushrod
Founding Member
 
pushrod's Avatar
 
Join Date: Nov 2001
Location: Baja 'Bama
Posts: 3,642
Default

Quote:
Originally Posted by Neal View Post
Steering head bearing?

No, the cylinder head bearing. Actually, there are two. One for each head.

They turn the piston at the top of its stroke, and direct it back down the cylinder.

If the bearing is improperly torqued, the piston can move form side-to-side, causing the bike to wobble.







No, not really. I was indeed referring to the steering head.

The fork trees are mounted to the steering stem. It is supported at the top and bottom by two bearings. The type of bearings used vary by the Manufacturer, but all of them have a very specific 'preload' to keep the front end of the bike under control.

I apologize for the smart-aleck response. That's usually Ken's contribution.
__________________
You would not understand,
this is not how I am...

I have become -
Comfortably Numb.
pushrod is offline   Reply With Quote
Old 08-19-2008, 05:33 AM   #8
Neal
Founding Member
 
Join Date: Nov 2001
Posts: 730
Default

Ha! i wasnt responding to you...i had missed your post. i was suggesting to the original poster that he may want to check the steering head bearings. As a vintage dirt bike guy, i'm purty familiar with steering head bearings
Neal is offline   Reply With Quote
Reply


Thread Tools

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

vB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are Off
Refbacks are Off