gas in oil , why?

  • indianajames
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gas in oil , why?

16 May 2011 06:30
#451383
gas in oil for the second time . balanced carbs with homemade manometer . had a funnel feed gas while i adjusted mixture screws and syncronized carbs linkage screws . anybody know whats going on ?? no problems with over flow . i am stumped . 750 ltd 1982 runs perfectly . H E L P ! !

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  • DoubleDub
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Re: gas in oil , why?

16 May 2011 08:10
#451391
The first thing that I would go after, even though you say no problems with overflow, would be float height and a blocked or clogged overflow.

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Re: gas in oil , why?

16 May 2011 09:44
#451405
DoubleDub wrote: The first thing that I would go after, even though you say no problems with overflow, would be float height and a blocked or clogged overflow.

Yep. Washing down a cylinder/s is the safe bet. In case you're not familiar with what we're saying, there's more fuel getting into the cylinder than it can burn and it's leaking past your rings into the oil. It doesn't mean you have bad rings, just that gas is less viscous than oil and can/ will run past the rings if there is too much in the chamber.
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  • Motor Head
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Re: gas in oil , why?

16 May 2011 09:48
#451406
Make sure that you do not leave the Petcock in "Prime" position. Also when the motor is off, and Petcock in "ON" or "Reserve", no fuel should leak through petcock to carbs.
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Re: gas in oil , why?

16 May 2011 20:09 - 16 May 2011 20:09
#451547
Motor Head wrote: Make sure that you do not leave the Petcock in "Prime" position. Also when the motor is off, and Petcock in "ON" or "Reserve", no fuel should leak through petcock to carbs.

I second that -- here's an easy way to find out if your petcock is still flowing gas when it shouldn't be and maybe flowing into the engine -- put it in RES or ON and remove the petcock's vacuum line and the fuel hose (engine off, of course). If gas still comes out with no vacuum pulling the petcock diaphagm open and the petcock's on RES or ON -- the petcock needs cleaning or rebuilt. Might be overrunning just carb #1 if you park your bike on the sidestand, then flowing into the #1 cyclider.
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Last edit: 16 May 2011 20:09 by newOld_kz1000.
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Re: gas in oil , why?

18 May 2011 18:53
#451959
figured it out . leaving gas in funnel with bike not running is like having it on prime all the time . plus 3 and 4 carbs were sucking tons of gas . bike runs perfectly now . thanks everyone . this forum rocks !!

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  • DoubleDub
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Re: gas in oil , why?

18 May 2011 22:52
#452014
Glad it worked out for you.

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