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Author Topic: Do CB550 airscrews need o-rings?  (Read 881 times)

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Offline hapsh

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Do CB550 airscrews need o-rings?
« on: March 16, 2008, 09:24:54 AM »
I was just cleaning my carbs and noticed my airscrews don't have any o-rings on them.  When I looked at some rebuild kits they show them without.  Do I need them?  If so where can I get them since the don't seem to be part of the rebuild kits?
http://cgi.ebay.com/ebaymotors/4-HONDA-CB550-74-76-carb-repair-rebuild-kits-carburetor_W0QQitemZ380005504234QQihZ025QQcategoryZ35597QQssPageNameZWDVWQQrdZ1QQcmdZViewItem

http://cgi.ebay.com/ebaymotors/HONDA-74-76-CB550-CARB-KITS_W0QQitemZ360033031151QQihZ023QQcategoryZ35597QQssPageNameZWDVWQQrdZ1QQcmdZViewItem
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'71 CB500/550, '72 CB450, '79 RD400 Daytona, '90 FZR600R

Offline mark

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Re: Do CB550 airscrews need o-rings?
« Reply #1 on: March 16, 2008, 09:31:07 AM »
The gasket sets from honda cost less than any of those and are supposed to have all the necessary bits. The metal parts don't usually wear out.


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1976 CB550K, 1973 CB350G, 1964 C100

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Offline TwoTired

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Re: Do CB550 airscrews need o-rings?
« Reply #2 on: March 16, 2008, 11:47:46 AM »
All 550s are not the same.
The 77-78 Cb550 carbs need orings on the pilot screws.

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Lloyd... (SOHC4 #11 Original Mail List)
72 500, 74 550, 75 550K, 75 550F, 76 550F, 77 550F X2, 78 550K, 77 750F X2, 78 750F, 79CX500, 85 700SC, GL1100

Those that learn from history are doomed to repeat it by those that don't learn from history.

Offline hapsh

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Re: Do CB550 airscrews need o-rings?
« Reply #3 on: March 16, 2008, 12:02:06 PM »
These are from '75.  They look just like the airscrews in the kit shown in the link above.  There is a flat recess that doesn't look like an o-ring would fit.
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'71 CB500/550, '72 CB450, '79 RD400 Daytona, '90 FZR600R

Offline TwoTired

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Re: Do CB550 airscrews need o-rings?
« Reply #4 on: March 16, 2008, 12:15:22 PM »
The 75 Cb550 carb pilot screws do not need o rings.  They meter air.  So, if they leak some air in, they meter that, too.
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Lloyd... (SOHC4 #11 Original Mail List)
72 500, 74 550, 75 550K, 75 550F, 76 550F, 77 550F X2, 78 550K, 77 750F X2, 78 750F, 79CX500, 85 700SC, GL1100

Those that learn from history are doomed to repeat it by those that don't learn from history.
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