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Rear axle alignment issue after swingarm install

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Old Aug 26, 2023 | 08:11 PM
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Default Rear axle alignment issue after swingarm install

I installed a chrome swing arm onto my 2000 dyna convertible, and now my rear wheel is way out of line and crooked with my rear fender by a lot. I tried to get it aligned with the axel adjusters but that’s not gonna happen with how far it is out. So I’ve been trying to do some research and now I’m wondering if I’m supposed to do a whole drivetrain alignment and what the best way to go about that would be. I out all new bearings and washers and bushings into the chrome swingarm. And the new one when I held it up onto the bike, the swingarm pivot shaft seemed to go in fine. So I’m not sure if when I removed the old swingarm the transmission shifted with the motor or what. But any help would be appreciated so I can get it back on the road. Thanks!
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Old Aug 27, 2023 | 08:27 AM
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Measure from the center of the swing arm pivots to the center of the axle ends and make both sides the same. That should get you in the ball park.
 

Last edited by John CC; Aug 27, 2023 at 08:29 AM.
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Old Aug 27, 2023 | 09:53 AM
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Originally Posted by John CC
Measure from the center of the swing arm pivots to the center of the axle ends and make both sides the same. That should get you in the ball park.
the problem I’m having now is the rear wheel looks offset to the pulley side
 
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Old Aug 27, 2023 | 10:02 AM
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Originally Posted by Reecewilliams00
I installed a chrome swing arm onto my 2000 dyna convertible, and now my rear wheel is way out of line and crooked with my rear fender by a lot. I tried to get it aligned with the axel adjusters but that’s not gonna happen with how far it is out. So I’ve been trying to do some research and now I’m wondering if I’m supposed to do a whole drivetrain alignment and what the best way to go about that would be. I out all new bearings and washers and bushings into the chrome swingarm. And the new one when I held it up onto the bike, the swingarm pivot shaft seemed to go in fine. So I’m not sure if when I removed the old swingarm the transmission shifted with the motor or what. But any help would be appreciated so I can get it back on the road. Thanks!
Was the center inside distance were the spaces on the outside of your axle hit the same distance as your old swing arm?

Not sure if you are saying the whole wheel/tire is closer to the fender on one side front to back or angled?. If it's angled, sounds like the swing arm has a manufacturer's problem.

Your engine/transmission hangs in its mounts on the same parallel center line of the frame. You don't shift it there. Now the rear swing arm alignments at the axle align the belt to the front drive cog pulley.

The proper spacers center wheel. As bikes got newer, tires and fenders grew wider. However on these, the actual wheel hub space where the bears press is is of course wider to position drive pulley. Spacer could be slightly different. Usually there not the same on each side either.

Sure I will be beat up posting that. But basically, good mounts when bolts align are as good as it gets. The rear at the axle has tolerance with belt tracking working within that tolerance. There the belt tracking takes precedence. The front handlebars then does the final alignment of what direction you go. Quite often, especially on old Softails, the front to rear center line of the tires is actually off a tad. Not much. Both tires have a radius, so it does not hurt.

 

Last edited by Jackie Paper; Aug 27, 2023 at 12:56 PM.
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Old Aug 27, 2023 | 12:32 PM
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Originally Posted by Reecewilliams00
the rear wheel looks offset to the pulley side
So you have the wrong spacers, or the spacers in the wrong places. (See post above.)
 
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Old Aug 28, 2023 | 06:54 AM
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Ended up my wheel was cocked because the front and rear motor mounts needed to be loosened and when I did that it allowed them to kind of be worked into place and it’s much better now after tightening them back down. The wheel is straight and aligned. Thanks for the help!
 
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Old Aug 28, 2023 | 08:52 AM
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Just for good measure might want to invest in an inclinometer and degree level to make sure. That much stress on mounts causing that swingsrm to be that much off just doesn’t sound good.
 
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Old Aug 28, 2023 | 09:39 AM
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My thoughts on a 2000 would be replacing them. JUST GUESSING BUT THEY MAY HAVE WEAR PLAY.
 
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Old Aug 29, 2023 | 08:02 PM
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Pull the chromed swingarm off and place it on top of the 1 that came off the bike and see if there is a difference. Make sure you are using the same spacers.
 
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