79 Kz650 American model question

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25 May 2021 13:50 - 25 May 2021 14:10 #848992 by kzed
79 Kz650 American model question was created by kzed
Can I cap off the air intake reeds on the cam shaft cover? And also get rid of this vacuum pump thing? It’s only on the US model so I’m thinking it Should be ok to delete these items. Please see picture . Wait I think they are old emissions stuff. So they are exhaust? 

 
Last edit: 25 May 2021 14:10 by kzed. Reason: Addition comment

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  • Scirocco
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25 May 2021 14:14 #848994 by Scirocco
Replied by Scirocco on topic 79 Kz650 American model question
Yes, connect the tube outlets together and close the air intakes to the exhaust ports with 6 mm grub/set screws, (you have to cut M6 into the head ports).
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25 May 2021 18:08 #848997 by kzed
Replied by kzed on topic 79 Kz650 American model question
Thank you brother! I will look into doing that! 
 

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26 May 2021 06:28 #849008 by TexasKZ
Replied by TexasKZ on topic 79 Kz650 American model question
Yes, block the ports with some grub screws. If you are handy at fabricating, you could make a pair of these—
kzzone.com/billet.html

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26 May 2021 14:03 - 26 May 2021 14:12 #849030 by martin_csr
Replied by martin_csr on topic 79 Kz650 American model question
A valve cover without the reed provisions should be available on EB. 
You'd probably need one that has the blanking provisions for blocking the reed holes.
Last edit: 26 May 2021 14:12 by martin_csr.
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26 May 2021 21:01 #849044 by cb900f
Replied by cb900f on topic 79 Kz650 American model question

... And also get rid of this vacuum pump thing? .
 
It just a passive vacuum switch.  When you let off the throttle, vacuum rises which pulls the switch 'closed' and interrupts the flow of clean air to the exhaust ports. 
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27 May 2021 05:01 - 27 May 2021 05:53 #849050 by martin_csr
Replied by martin_csr on topic 79 Kz650 American model question


ps:  Subaru came out with a similar passive system at least as earlier as 1976.
Last edit: 27 May 2021 05:53 by martin_csr.

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