Another, "What's this vibration?" Thread...
Thread Starter
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Road Warrior
Joined: Oct 2010
Posts: 1,524
Likes: 36
From: San Diego, CA
Another, "What's this vibration?" Thread...
Lately my bike hasn't been handling too hot. I've been getting speed wobbles just driving straight at the 90mph and above mark...the faster over 90, the worse it gets. It seems speed related, not RPM related (switching between 5th and 6th doesn't change it)
I'm also getting a metal on metal "clank" sound from the rear and poor handling in twisties. These symptoms seem to add up to rear motor mount issues right?
The curveball here is: Tuesday I was riding and a car pulled up to me at a stop light and told me something fell off my bike. I turned around and it was a rear axle nut cover from the left side. I got home and the right side was dangling too.
I don't know the actual technical term, but the large nut on the axle on the outside of the swingarm was spinning freely (luckily there's that giant C clip on the end of the axle). I fastened it way down with loctite, but I still don't think this was the issue.
So what are your thoughts? Could bad motor mounts be causing excessive vibrations in the rear axle making the axle nut covers fall off and axle nut to come loose? Do you think it's a wheel issue? Could the wheel be sliding side to side, thus causing the speed wobbles? Could the wheel center diameter be too big for the axle and be shifting up and down, causing the clank?
I've got 13 spoke mags on the rear that were drilled out by a reputable shop, and this procedure has been done many times to other high-profile Dynas so I don't think it's an issue with the shop's work on the wheel.
It's either motor mount, shocks or wheel....but what sounds the most logical? I don't know how to get to the rear motor mounts to check them out.
I'm also getting a metal on metal "clank" sound from the rear and poor handling in twisties. These symptoms seem to add up to rear motor mount issues right?
The curveball here is: Tuesday I was riding and a car pulled up to me at a stop light and told me something fell off my bike. I turned around and it was a rear axle nut cover from the left side. I got home and the right side was dangling too.
I don't know the actual technical term, but the large nut on the axle on the outside of the swingarm was spinning freely (luckily there's that giant C clip on the end of the axle). I fastened it way down with loctite, but I still don't think this was the issue.
So what are your thoughts? Could bad motor mounts be causing excessive vibrations in the rear axle making the axle nut covers fall off and axle nut to come loose? Do you think it's a wheel issue? Could the wheel be sliding side to side, thus causing the speed wobbles? Could the wheel center diameter be too big for the axle and be shifting up and down, causing the clank?
I've got 13 spoke mags on the rear that were drilled out by a reputable shop, and this procedure has been done many times to other high-profile Dynas so I don't think it's an issue with the shop's work on the wheel.
It's either motor mount, shocks or wheel....but what sounds the most logical? I don't know how to get to the rear motor mounts to check them out.
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Joined: May 2006
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From: the 50s & the 60s
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that large nut thingie was not properly fastened.........
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Road Warrior
Joined: Oct 2010
Posts: 1,554
Likes: 52
From: Ottawa Canada
This may sound weird but I had the same issue even the loose axle nut, it turned out to be the bearing spacer was missing when I had new bearings installed, this wore out the bearing to the point the axle nut became loose.
could also be just a loose axle nut and everything will be fine once tightened, mine could be just an isolated case.
could also be just a loose axle nut and everything will be fine once tightened, mine could be just an isolated case.
Thread Starter
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Road Warrior
Joined: Oct 2010
Posts: 1,524
Likes: 36
From: San Diego, CA
Yeah it's ****ed...not just a little weeble wobble but full on WHAW WHAW WHAW back and forth. Squid, you going to the event at Pala tomorrow?
Ultimate HDF Member
Joined: Mar 2007
Posts: 7,465
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From: Corona, Ca
Sounds like the bearing are fvcked, pull the wheel and check em out along with the axle sleeve
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I was going to take my youngest. He loves the Redlight King video, but his soccer team made the finals...double header tomorrow. Hopefully someone will post some youtube of it.
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Road Master
Joined: Nov 2006
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From: Huntley, IL
Take it back to the shop that did the work and let them check it out, before you kill yourself.
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From: The Whale's Vagina