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    Petcock Stainless Steel Screws

    I am tryhing to replace my original screws that hold the fuel petcock on with stainless steel allen head screws. I have a nice new petcock and would like to go with SS 6mm screws but since filling my tank with fuel i am getting a slow drip from around the screw head. I have SS washer fitted for a 6mm screw that uses a 5mm allen wrench.

    Do I need a flange head screw for more distributed pressure to create a better seal? I would like to stay SS Allen head if possible.

    Thanks!
    1979 GS850G
    2004 SV650N track bike
    2005 TT-R125 pit bike
    LRRS #246 / Northeast Cycles / Woodcraft / Armour Bodies / Hindle Exhaust / Central Mass Powersport

    http://s327.photobucket.com/albums/k443/tas850g/

    #2
    Originally posted by tas850g View Post
    I am tryhing to replace my original screws that hold the fuel petcock on with stainless steel allen head screws. I have a nice new petcock and would like to go with SS 6mm screws but since filling my tank with fuel i am getting a slow drip from around the screw head. I have SS washer fitted for a 6mm screw that uses a 5mm allen wrench.

    Do I need a flange head screw for more distributed pressure to create a better seal? I would like to stay SS Allen head if possible.

    Thanks!
    try some thread sealer or PTFE tape on the threads, any petrol resistant sealer will work
    1978 GS1085.

    Just remember, an opinion without 3.14 is just an onion!

    Comment


      #3
      I am pretty sure that # 6 is the OEM washer and if it is like mine it has a little rubber seal on the inside of it by the threads for sealing. Did your replace it with a regular type washer or re-use it?

      82 GS850L - The Original http://s224.photobucket.com/albums/d...ePics067-1.jpg
      81 GS1000L - Brown County Hooligan http://s224.photobucket.com/albums/d...ivePics071.jpg
      83 GS1100L - Super Slab Machine http://s224.photobucket.com/albums/d...t=DCP_1887.jpg
      06 KLR650 - "The Clown Bike" :eek: http://s224.photobucket.com/albums/d...nt=SERally.jpg
      AKA "Mr Awesome" ;)

      Comment


        #4
        You have to apply fuel resistant sealer around the threads of the screws. Ted

        Comment


          #5
          i replaced the washer with a new SS washer, no internal rubber ring on the washer. I have the original washers but i think they too do not have a rubber ring.

          I was thinking about finding any washer with an internal rubber ring. I will ook to see what i find at the hardware store for washers.
          1979 GS850G
          2004 SV650N track bike
          2005 TT-R125 pit bike
          LRRS #246 / Northeast Cycles / Woodcraft / Armour Bodies / Hindle Exhaust / Central Mass Powersport

          http://s327.photobucket.com/albums/k443/tas850g/

          Comment


            #6
            The kind of washer you are looking for is a sealing washer.

            They look like this..
            Last edited by Guest; 10-06-2009, 08:53 AM.

            Comment


              #7
              good visual, i'll do some searching. Thanks for the help!
              1979 GS850G
              2004 SV650N track bike
              2005 TT-R125 pit bike
              LRRS #246 / Northeast Cycles / Woodcraft / Armour Bodies / Hindle Exhaust / Central Mass Powersport

              http://s327.photobucket.com/albums/k443/tas850g/

              Comment


                #8
                Just use a 1/4" nylon washer from any hardware store.

                It's worked on my bike for ten years or so...
                1983 GS850G, Cosmos Blue.
                2005 KLR685, Aztec Pink - Turd II.3, the ReReReTurdening
                2015 Yamaha FJ-09, Magma Red Power Corrupts...
                Eat more venison.

                Please provide details. The GSR Hive Mind is nearly omniscient, but not yet clairvoyant.

                Celeriter equita, converteque saepe.

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                Co-host of "The Riding Obsession" sport-touring motorcycling podcast at tro.bike!

                Comment


                  #9
                  i'm a little skeptical b/c the fuel is coming from the allen head but i suppose if the washer is a tight fit to the head and the shaft of the screw then it could work. I'll try the sealing washer and the nylon washer.

                  Thanks for the suggestions!
                  1979 GS850G
                  2004 SV650N track bike
                  2005 TT-R125 pit bike
                  LRRS #246 / Northeast Cycles / Woodcraft / Armour Bodies / Hindle Exhaust / Central Mass Powersport

                  http://s327.photobucket.com/albums/k443/tas850g/

                  Comment


                    #10
                    Don't forget to use some thread sealant.

                    Comment


                      #11
                      It's on my list. Off to the hardware store in the morning.
                      1979 GS850G
                      2004 SV650N track bike
                      2005 TT-R125 pit bike
                      LRRS #246 / Northeast Cycles / Woodcraft / Armour Bodies / Hindle Exhaust / Central Mass Powersport

                      http://s327.photobucket.com/albums/k443/tas850g/

                      Comment


                        #12
                        i just bought 2 neoprene washers with an inside diameter of 3/16" and kind of threaded it onto the stainless steel 6mm screw with a SS washer. The i.d. was a bit smaller than the 6mm screw shaft. Applied some thread sealant and tightened down the 2 screws. Filled the tank with fuel and after an hour no leaks around the allen head. Had to be careful how much i torqued down the screw b/c the pressure from the allen head and washer was squishing the neoprene washer. I could have gone tighter but didn't. Will monitor my work to see if this will hold up.

                        Thanks for the tips!
                        1979 GS850G
                        2004 SV650N track bike
                        2005 TT-R125 pit bike
                        LRRS #246 / Northeast Cycles / Woodcraft / Armour Bodies / Hindle Exhaust / Central Mass Powersport

                        http://s327.photobucket.com/albums/k443/tas850g/

                        Comment

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