Back wheel off centre

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15 Oct 2021 16:53 #856695 by KennyJ
Back wheel off centre was created by KennyJ



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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15 Oct 2021 18:49 #856699 by Mikaw
Replied by Mikaw on topic Back wheel off centre
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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15 Oct 2021 21:23 - 15 Oct 2021 21:26 #856701 by TexasKZ
Replied by TexasKZ on topic Back wheel off centre
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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1981 KZ1000 LTD awaiting resurrection
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Last edit: 15 Oct 2021 21:26 by TexasKZ.

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  • Scirocco
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16 Oct 2021 00:52 - 16 Oct 2021 01:02 #856704 by Scirocco
Replied by Scirocco on topic Back wheel off centre
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

 
Last edit: 16 Oct 2021 01:02 by Scirocco.

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16 Oct 2021 06:12 #856707 by Rick H.
Replied by Rick H. on topic Back wheel off centre
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.

Rick H.

1977 Kawasaki KZ-1000A1

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16 Oct 2021 07:41 #856711 by slmjim+Z1BEBE
Replied by slmjim+Z1BEBE on topic Back wheel off centre

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.

Good Ridin'
slmjim & Z1BEBE

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16 Oct 2021 09:17 #856716 by Mikaw
Replied by Mikaw on topic Back wheel off centre
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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16 Oct 2021 10:19 #856717 by Scirocco
Replied by Scirocco on topic Back wheel off centre
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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16 Oct 2021 15:56 #856729 by KennyJ
Replied by KennyJ on topic Back wheel off centre
spacers are in the proper places on the hub. Looks like a spoke tightening issue

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16 Oct 2021 15:58 #856730 by KennyJ
Replied by KennyJ on topic Back wheel off centre
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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16 Oct 2021 16:00 #856731 by KennyJ
Replied by KennyJ on topic Back wheel off centre
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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16 Oct 2021 16:04 #856732 by KennyJ
Replied by KennyJ on topic Back wheel off centre
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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