Squirrely rear, part 2
Squirrely rear, part 2
repost... posted in the wrong forum
ok, i am now about 90% sure that it is not the tire. i think it is the rear or both motor mounts.
twice now, the bike has gone batsh** on the highway at about 70 mph. both time traffic behind me slowed. i guess they were seeing the bike wobbling and acting up. after getting to the far right and slowing, the bike stabilized and i limped of the highway... problem disappeared right away. so i have a long haul bike incapable of long hauls. lol
i think what was happening at low speed was rear steer and that made me think it was the rear tire.
what is the fix here. seems like death waiting to happen
ok, i am now about 90% sure that it is not the tire. i think it is the rear or both motor mounts.
twice now, the bike has gone batsh** on the highway at about 70 mph. both time traffic behind me slowed. i guess they were seeing the bike wobbling and acting up. after getting to the far right and slowing, the bike stabilized and i limped of the highway... problem disappeared right away. so i have a long haul bike incapable of long hauls. lol
i think what was happening at low speed was rear steer and that made me think it was the rear tire.
what is the fix here. seems like death waiting to happen
Could be swingarm bushings, wheel bearings, neck bearing, motor mounts.
For me it ended up being one rear shock was set a little different to the other.
Hope this helps; it sucks trying to track down Dyna wobbles.
For me it ended up being one rear shock was set a little different to the other.
Hope this helps; it sucks trying to track down Dyna wobbles.
will check shocks as well.
Last edited by cvaria; Jan 28, 2017 at 09:01 AM.
Extreme HDF Member
Joined: Feb 2015
Posts: 10,907
Likes: 8,758
From: Galt's Gulch - MI
Aw, man!When it comes to chasing down these wobbles and vibrations you need to think of a Dyna in two sections; the engine/primary/transmission/rear fork/rear wheel are the drive line riding on the isolators with a top stabilizer between the cylinders. The front wheel, forks, and frame are the chassis.
Back to basics; before you began to transform your beastie were you having any sort of wobble issues when riding her stock? You're absolutely certain the rear axle adjusters are correct, no plus or minus on the axle? Did you remove the clamps when you were working on the front? Did you loosen or remove the top stabilizer during the work you've done? Have you ever done the vehicle/engine alignment?
I'm with Biter and AussieTX, start with the head bearings and be sure the bearing adjuster nut is proper; inspect the isolators, especially the front for signs it's collapsing and contacting the engine bracket; double check that your rear axle is adjusted exactly on the money...
I hate Dyna wobbles!
Seasoned HDF Member
Joined: Jan 2015
Posts: 15,990
Likes: 7,111
From: Sandy Eggo's North County
At what speeds are these wobbles known to take place? Do they occur during a lean?
When recovering from a lean?
Under braking/acceleration during a lean?
I know the FL's have this issue when riding 90+. Is the Dyna susceptable in the same speed range too?
When recovering from a lean?
Under braking/acceleration during a lean?
I know the FL's have this issue when riding 90+. Is the Dyna susceptable in the same speed range too?
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Extreme HDF Member
Joined: Jun 2014
Posts: 11,448
Likes: 2,299
From: NW Ohio
I can't really add anything to what's already been said. Be methodical. Grab hold of the bitch and shake the **** out of her. May be able to see some shifting somewhere.
If you have one, a frame-mounted action cam pointed at suspected problem areas might pick up on something while the symptoms are being felt.
I've been lucky so far with my DWG. Solid as a rock at speed. I'm still planning on stabilized mounts, tho. I really feel the uncontrolled lateral motion the stockers allow is unacceptable.
If you have one, a frame-mounted action cam pointed at suspected problem areas might pick up on something while the symptoms are being felt.
I've been lucky so far with my DWG. Solid as a rock at speed. I'm still planning on stabilized mounts, tho. I really feel the uncontrolled lateral motion the stockers allow is unacceptable.
Last edited by cggorman; Jan 28, 2017 at 10:23 AM.
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Grand HDF Member
Joined: Jul 2016
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From: Texas
Methodical - yes
One suggestion for trouble shooting
Jack it up.., strap it down - start / place in gear
Then have someone twist the throttle while you're behind the bike - and see if you see any looseness / wobble
Also while jacked up - shake the *** end to see if there any looseness
Ghost
One suggestion for trouble shooting
Jack it up.., strap it down - start / place in gear
Then have someone twist the throttle while you're behind the bike - and see if you see any looseness / wobble
Also while jacked up - shake the *** end to see if there any looseness
Ghost
