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Author Topic: 78 cb550 carb rebuild kit  (Read 1271 times)

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Offline drkblusea

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78 cb550 carb rebuild kit
« on: March 22, 2016, 11:15:13 PM »
Can anyone identify the various o rings in the kit and where they go in each carb? I do know that one of, if not the smallest o ring goes in with the air screw, spring and small washer, and maybe one of them is just for the float bowl drain screw? but that's about all I know. Any help or recommendations will be greatly appreciated! 
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Offline harisuluv

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Re: 78 cb550 carb rebuild kit
« Reply #1 on: March 22, 2016, 11:21:05 PM »
From left to right:  Fuel, fuel, x, drain screw, air screw, air screw.

you don't need two air screws.  the x is maybe for the main jet and emulsion assy, which is not used in the oem assy.

On a related note, don't buy that junk.

Reuse your OEM brass, get Honda parts.
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Offline drkblusea

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Re: 78 cb550 carb rebuild kit
« Reply #2 on: March 23, 2016, 01:35:13 PM »
Quote from: harisuluv on March 22, 2016, 11:21:05 PM
From left to right:  Fuel, fuel, x, drain screw, air screw, air screw.

you don't need two air screws.  the x is maybe for the main jet and emulsion assy, which is not used in the oem assy.

On a related note, don't buy that junk.

Reuse your OEM brass, get Honda parts.

harisuluv thankyou for your reply! When you say the first two o rings are for fuel, what exactly do you mean? are they the rings that go on the fuel rail tubes that connects the carbs and allows fuel to run between each carb?
Also, I am just using the orings from the pic for reference so that I can purchase the right size/amount for my rebuild, I am reusing my stock brass and such like you suggested.
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Offline flybox1

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Re: 78 cb550 carb rebuild kit
« Reply #3 on: March 23, 2016, 01:43:13 PM »
Quote from: drkblusea on March 23, 2016, 01:35:13 PM
harisuluv thankyou for your reply! When you say the first two o rings are for fuel, what exactly do you mean? are they the rings that go on the fuel rail tubes that connects the carbs and allows fuel to run between each carb? Yes
Also, I am just using the orings from the pic for reference so that I can purchase the right size/amount for my rebuild, I am reusing my stock brass and such like you suggested.  Good choice!
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'78 750K (F3 engine) PD42b's, Modified airbox w/K&N  filter, 40/110 jets, 1 needle shim, IMS@ 1 turn out. Kerker + Cone 18" QuietCore

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Offline harisuluv

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Re: 78 cb550 carb rebuild kit
« Reply #4 on: March 23, 2016, 04:53:11 PM »
yeah those are for the 3 fuel rails, you need six total for pd carbs.
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