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Old 07-26-2014, 02:24 PM   #1
matyreb OP
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Joined: Apr 2009
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Gas in the oil

Hey guys, Had a DRZ400s petcock failure and I got gas in the oil. Purchased a new petcock (manual shut off) put that on and I changed the oil, new filter. When fired it up it ran strong but as soon as I turn off the choke it dies. No idea what is going on. I have Keihin carb on it. Any info would be appreciated.
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Old 07-26-2014, 02:31 PM   #2
SloMo228
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Might not be related to the gas in the oil issue at all. How long did the bike sit before you got the new petcock, changed the oil, and tried to start it up again? Could just have a gummed up carb from sitting for a while.
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Old 07-26-2014, 02:35 PM   #3
matyreb OP
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It sat only a matter of days
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Old 07-26-2014, 03:44 PM   #4
Beezer
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the original petcock had a vacuum line to the carb or mounting spigot... that hose needs to be plugged, it's letting air bypass the carb into the cylinder

also, if you had gas in the oil, your needle and/or seat in the carb are leaking. you need both failures to get gas in the oil

btw.... the vac line is to operate a diaphragm in the petcock. it is spring loaded to shut off fuel when the engine is off & when the engine runs, vacuum opens the shutoff. since the carb's needle leaks... and you no longer have the auto off feature, if you forget and leave the fuel on you will have gas in the oil again, or possibly liquid lock the cylinder.

edit (hint... fix the carb too)

Beezer screwed with this post 07-26-2014 at 03:50 PM
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Old 07-26-2014, 03:53 PM   #5
matyreb OP
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I thank you much kind sir
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