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    New petcock?

    Just installed a new OEM petcock on my 81 GS650E. For some reason, the gas flow won't stop when ignition is turned off and is spilling over into the airbox. The vacuum line is connected, have tried "prime", "on", "res". Is there no OFF? I crimped the line and it stopped, mercifully. I was under the impression this worked off the carb vacuum. No?

    #2
    It should just free flow in the prime position only, all others should require vacuum.
    1984 GS1100GK newest addition to the heard
    80 GS 1000gt- most favorite ride love this bike
    1978 GS1000E- Known as "RoadKill" , Finished :D
    83 gs750ed- first new purchase
    85 EX500- vintage track weapon
    1958Ducati 98 Tourismo
    “Remember When in doubt use full throttle, It may not improve the situation ,but it will end the suspense ,
    If it isn't going to make it faster or safer it isn't worth doing

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      #3
      OK. Yeah, it still flows in ON & RES position. Is it defective?

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        #4
        Originally posted by tedk View Post
        OK. Yeah, it still flows in ON & RES position. Is it defective?
        Yes..sounds like a defective petcock.
        sigpicMrBill Been a GSR member on and off since April 2002
        1980 GS 750E Bought new in Feb of 1980
        2015 CAN AM RTS


        Stuff I've done to my bike:dancing: 1100E front end with new Sonic springs, 1100E swing arm conversion with new Progressive shocks installed, 530 sprockets/chain conversion, new SS brake lines, new brake pads. New SS fasteners through out. Rebuilt carbs, new EBC clutch springs and horn installed. New paint. Motor runs strong.

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          #5
          Ok, here we go. I called the mailorder place I got it from. He asked if I had installed, I said "yes of course, how else would I know it was faulty?" Sensing I was getting the "stroke", the guy told me I would have to return it to a local dealer to diagnose it was defective. He seemed pretty disinterested at this point. So I went out to the garage to contemplate what I should do. I decided to take the plunge and take the diaphram plate off as this is where the action is. Sure enough, the spring that returns the diaphram was missing. Good thing I had my old crappy one that I could use. Presto, it works A1! Self diagnosed again. I should charge myself a fortune. Beware of the "just get the factory one" mentality sometimes.
          Last edited by Guest; 10-16-2012, 07:58 PM.

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            #6
            Good job. It shouldn't have been necessary to even touch the thing -- it should be returnable if DOA -- but you saved yourself that headache too.

            I don't recall ever getting a substandard OEM part... lucky you.
            and God said, "Let there be air compressors!"
            __________________________________________________ ______________________
            2009 Suzuki DL650 V-Strom, 2004 HondaPotamus sigpic Git'cha O-ring Kits Here!

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              #7
              Story of my life. Whaaaa!

              Bike sounds good though. Runs wicked ****a!

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