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Back wheel off centre 15 Oct 2021 16:53 #856695

  • KennyJ
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Could this be caused by respoking the rim with the center hubs on the wrong side...anyone come across this one?

Thanks
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Back wheel off centre 15 Oct 2021 18:49 #856699

  • Mikaw
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What do you mean by “center hubs”?
1976 KZ 900 A4 kzrider.com/forum/11-projects/613548-1976-kz-900-a4
1976 KZ 900 B1 LTD
1978 KZ 1000 B2 LTD
1980 KZ 750 E1
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Jimi Hendrix.

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Back wheel off centre 15 Oct 2021 21:23 #856701

  • TexasKZ
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I would look first at the axle spacers to be sure they are installed correctly. Doesn’t that big spacer that is currently on the brake pedal side belong on the chain side?
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Back wheel off centre 16 Oct 2021 00:52 #856704

  • Scirocco
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The axle spacers are installed correctly. The big spacer belongs to the drum brake site.
Your wheel rim to wheel hub position is respoke and trued out of center.

kzrider.com/forum/5-chassis/615977-kz900-back-wheel-off-center

 
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Back wheel off centre 16 Oct 2021 06:12 #856707

  • Rick H.
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I also have to ask what is meant by "center hubs"?  I could be wrong but I thought the rim ran straight to the hub on these bikes, in other words, no off-set.  The way the wheel is positioned now if the hub was trued off-set it should be easy to see, but the pics provided don't show this.  I would like to see some closer pics from more of an angle to the rear hub/wheel to verify this.  I assume the distance spacers are positioned correctly??  If not that could be a contributing factor here.  And if the wheel is trued to favor an off-set why was this done?  Dunno, need some more pics.  I guess if it were my bike I would take it back apart and lay the pieces out EXACTLY as I removed them in chronological order, including the inner distance spacers just to verify what I was seeing here.  Yes, it's more work, but sometimes just turning a spacer around the wrong way can have an impact on wheel position.

Rick H.
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Back wheel off centre 16 Oct 2021 07:41 #856711

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KennyJ post=856695




Could this be caused by respoking the rim with the center hubs on the wrong side...anyone come across this one?

Thanks

Appears to be a KZ1000?  We can only speak to Z1's based on personal experience rebuilding Z1 spoke wheels, but suspect that KZ1000's are the same;  there is no offset specified between the hub center and rim center.  It's a little tricky to measure precisely to a fraction of a mm but, that isn't the case here.  The rim in the pic looks to be seriously offset from the hub centerline.  Don't know of any spacer mismatch or assembly error that would account for the offset error seen in the pic & still have the axle nut tighten while allowing the wheel to spin freely.

Lay a straight edge across one side of the rim, resting on the the outer rim flanges (not touching the tire sidewalls) as close as possible to the outer circumference of the inner hub.  Measure to the hub's circumferential center with calipers or some such.  Repeat for the other side.  We think you'll discover the rim centerline is offset from the centerline by a significant margin.

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Back wheel off centre 16 Oct 2021 09:17 #856716

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First check orientation of the distance spacers and the wheel bearing placement. Follow the exploded view Scirocco posted. If they are correct, then 
Check the chain alignment?. If it’s correct then it’s a good chance as Slmjim suggests that the rim has been laced incorrectly and the hub is off set.
1976 KZ 900 A4 kzrider.com/forum/11-projects/613548-1976-kz-900-a4
1976 KZ 900 B1 LTD
1978 KZ 1000 B2 LTD
1980 KZ 750 E1
Kowledge Speaks, But Wisdom Listens.
Jimi Hendrix.

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Back wheel off centre 16 Oct 2021 10:19 #856717

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As an easy test mount the wheel and spacers from LH to RH side (except the chain). If the wheel is offset to the RH site your wheel hub to wheel rim position is off center.

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Back wheel off centre 16 Oct 2021 15:56 #856729

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spacers are in the proper places on the hub. Looks like a spoke tightening issue

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Back wheel off centre 16 Oct 2021 15:58 #856730

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Yes, I believe that this may be the issue as everything is put back together correctly according to the service manual. Thanks

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Back wheel off centre 16 Oct 2021 16:00 #856731

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Yes, I believe that this is the issue. Too bad as I spent a lot of time getting this rim to better than perfect specs......GRRRRR

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Back wheel off centre 16 Oct 2021 16:04 #856732

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Thanks for the info Rick. I believe that the wheel was relaced improperly. Too bad as I spent a lot of time getting the rim to run absolutely perfect. GRRRRR

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