Author Topic: Could this cause gas to get into my oil?  (Read 586 times)

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Offline JDrider

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Could this cause gas to get into my oil?
« on: August 06, 2023, 09:43:12 AM »
1975 cb550k1
After taking apart the carbs.
I removed the float needle seat and this piece of something b that looks like thread lock
Was under.
How could that get back there?
This is in carb 3 and that was overflowing sometimes.
Also I’m getting fuel into the oil.

I replaced the seat and float needle with an oem old stock.
Hopefully that will resolve the issue.
See photo.
JD
1975 CB550K1

Offline bryanj

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Re: Could this cause gas to get into my oil?
« Reply #1 on: August 06, 2023, 09:49:12 AM »
Anything is possible, but some things are less probable than others, if the carb was flooding gas gets into oil
Semi Geriatric ex-Honda mechanic and MOT tester (UK version of annual inspection). Garage full of "projects" mostly 500/4 from pre 73 (no road tax in UK).

Remember "Its always in the last place you look" COURSE IT IS YOU STOP LOOKIN THEN!

Offline JDrider

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Re: Could this cause gas to get into my oil?
« Reply #2 on: August 06, 2023, 09:51:33 AM »
I thought if it was coming out the overflow, and the seat and float needle are working properly, the gas won’t get into the intake?
JD
1975 CB550K1

Offline bryanj

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Re: Could this cause gas to get into my oil?
« Reply #3 on: August 06, 2023, 09:52:55 AM »
If it is coming out of the overflow the seat and needle CAN NOT be working properly
Semi Geriatric ex-Honda mechanic and MOT tester (UK version of annual inspection). Garage full of "projects" mostly 500/4 from pre 73 (no road tax in UK).

Remember "Its always in the last place you look" COURSE IT IS YOU STOP LOOKIN THEN!

Offline JDrider

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Re: Could this cause gas to get into my oil?
« Reply #4 on: August 06, 2023, 09:54:27 AM »
Gotcha. Thanks
JD
1975 CB550K1

Offline denward17

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Re: Could this cause gas to get into my oil?
« Reply #5 on: August 06, 2023, 10:07:43 AM »
Is there a screen on the petcock inside the gas tank? Liner?

Offline Don R

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Re: Could this cause gas to get into my oil?
« Reply #6 on: August 06, 2023, 10:18:29 AM »
 If there is gas in the oi I'd say odds are it came from there. A bike on the side stand moves the bowl levels around and a leaker will do what it should not do.
  I like the 75/76 750F float valves that have the little screen above the float valve. I have seen the same model carbs on K bikes also, I always wanted to try them on other carbs.
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Offline ekpent

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Re: Could this cause gas to get into my oil?
« Reply #7 on: August 07, 2023, 04:42:53 AM »
Since that big flake of whatever was on the backside of the needle seat it actually would have more of a tendency to plug the hole  then cause a leak unless little pieces smaller then the hole were breaking off and getting stuck on the needle end..