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KZ400 Rear sprocket hub

  • TombstoneTom
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21 Nov 2024 15:39 #906280 by TombstoneTom
KZ400 Rear sprocket hub was created by TombstoneTom
Question.  '77 KZ400 Deluxe.
I came across this while replacing bearings, seals, O-ring etc.   Is there supposed to be a groove where the black ring is?  This is where the o-ring sits from the hub.  It doesn't seem too deep.  Since it doesn't spin I can't imagine how it would wear a groove? Thanks in advance!

1977 KZ400 Deluxe A1

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22 Nov 2024 13:22 #906296 by Wookie58

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22 Nov 2024 14:17 #906301 by TombstoneTom
Replied by TombstoneTom on topic KZ400 Rear sprocket hub
Wrong side, turn it around. The o-ring rides on the area with the picture.   
   

1977 KZ400 Deluxe A1
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22 Nov 2024 14:20 #906302 by TombstoneTom
Replied by TombstoneTom on topic KZ400 Rear sprocket hub
Meant original picture I posted where it sits 

1977 KZ400 Deluxe A1

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  • gd4now
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23 Nov 2024 07:00 - 23 Nov 2024 07:03 #906321 by gd4now
Replied by gd4now on topic KZ400 Rear sprocket hub
All the parts lists I can find do not show an o-ring located on the interior of coupling a grease seal on the exterior of it and a bearing Here is one from a paper parts list

1977 KZ650 B1
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OLD KAW OWNERS SMILE ALOT

Last edit: 23 Nov 2024 07:03 by gd4now.

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23 Nov 2024 09:55 #906329 by TombstoneTom
Replied by TombstoneTom on topic KZ400 Rear sprocket hub
That’s really weird….   I’ll take a bunch of photos of mine when I get to my shop

1977 KZ400 Deluxe A1

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23 Nov 2024 10:08 - 23 Nov 2024 10:10 #906330 by gd4now
Replied by gd4now on topic KZ400 Rear sprocket hub
Did not mean to indicate an o-ring was not on your machine. Rather that I can not find an parts list that shows one. Could be my lack of searching skills.

1977 KZ650 B1
Pods and Denco header


OLD KAW OWNERS SMILE ALOT

Last edit: 23 Nov 2024 10:10 by gd4now.

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  • Scirocco
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23 Nov 2024 14:41 - 23 Nov 2024 14:41 #906344 by Scirocco
Replied by Scirocco on topic KZ400 Rear sprocket hub
The o-ring is fit on the rear wheel hub and acts like a dust seal to the wheel bearing.

 
Last edit: 23 Nov 2024 14:41 by Scirocco.

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23 Nov 2024 15:44 #906351 by TombstoneTom
Replied by TombstoneTom on topic KZ400 Rear sprocket hub
Yes, I know.  I even posted a picture of it where it sits/rides on.  In the original post. My question is there supposed to be a groove where it sits/rides.  Not where it’s installed on the main hub but where it rides in the damper section.  

1977 KZ400 Deluxe A1

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23 Nov 2024 16:18 #906354 by Scirocco
Replied by Scirocco on topic KZ400 Rear sprocket hub
Ah, okay. So a worn out wheel/sprocket hub bearing or some weak rubber damper elements on hard (de-)acceleration can create a relative woobling movement. All this could made this wear imprint on the sprocket hub....

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23 Nov 2024 18:29 #906358 by TombstoneTom
Replied by TombstoneTom on topic KZ400 Rear sprocket hub
Ok, so I’m to understand that there is not supposed to be a groove?  Supposed to be smooth and flat? 

1977 KZ400 Deluxe A1

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