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Petrol in the oil - after long lay off

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    Petrol in the oil - after long lay off

    gsx250e 1980

    - been stood for 3 months - last run was perfect. petrol in tank
    - started it up and was hard to start but usually is after a lay off
    - put it on res as thiught may be low on fuel.
    - then just would not start at all.

    - Saw a line of fuel from where i had tried to bump it
    - petrol in the oil big time ! another inch up dipstick.
    SO
    - Ring s- no way
    - floats on carbs ? poss
    - But before i have had this not so bad but when the fuel petcock disintegrated.

    - petcock off and there was dirt blocking a small hole.
    - cleaned blew out
    -petrol doesnt not flow in normal mode but does freely in res Q) is this right ? should it flow freely in res ?

    Anyway. Petcock i think fixed.
    do i need to check the floats ? (a pain)
    Attached Files
    Last edited by ukjules; 07-22-2021, 08:18 AM.
    UKJULES
    ---------------------------------
    Owner of following bikes:
    1980 Suzuki GS550ET
    1977 Yamaha RD 250D
    1982 Kawasaki GPZ 750 R1
    1980 Suzuki GSX 250E

    #2
    Untitledgsx 250 petcock exploded.jpg

    pic2
    UKJULES
    ---------------------------------
    Owner of following bikes:
    1980 Suzuki GS550ET
    1977 Yamaha RD 250D
    1982 Kawasaki GPZ 750 R1
    1980 Suzuki GSX 250E

    Comment


      #3
      A common problem with some Suzuki Vac taps regardless of the condition of the float valves and heights.
      Fuel will just weep past them when standing for long periods.
      Had it happen couple of times and fitted an inline manual tap as insurance.
      Sounds like you know the procedure to drain the oil and spin the motor with the plugs out to clear it out before filling with fresh oil.
      As for the tap, depending on the type it should have prime , on and reserve.
      Prime should be the only one that flows with the engine off.
      Mikuni Viton Choke Plunger Seat Renewal.
      VITON Choke plunger seals .KAWASAKI Z1,Z900,Z650,Z1000,Z1R,SUZUKI GS1000,GSXR,RF | eBay

      Air Corrector Jets for Mikuni VM 24, 26 and 28mm carbs .
      https://www.ebay.co.uk/itm/254380193...84.m1555.l2649



      sigpic

      Comment


        #4
        Pet cock should flow fuel freely only in Pri. position. ON & Res. should require vacuum to open & let fuel flow. Yes, gas in crankcase you have both a not sealing pet cock & a leaking needle & seat. Just my opinion.
        1983 GS1100E, 1983 CB1100F, 1991 GSX1100G, 1996 Kaw. ZL600 Eliminator, 1999 Bandit 1200S, 2005 Bandit 1200S, 2000 Kaw. ZRX 1100

        Comment


          #5
          Thanks guys.

          Never had an issue with the carbs and engine is as sweet as can be.

          The tap flows in rsrv like a fountain ! and at some angles in normal mode. the diaphragm looks fine but there has to be
          soming wrong internally.
          On that tap there is a prime screw.

          am considering this from wemoto. pipes point wrong way in pic but it has a prime on it , a proper one.
          and i have a load of tubes to try. ill go for the petcock first and see.
          A risk as i may needd to strip the carbs but ill take it one step at a time
          wemoto petcock.JPG
          UKJULES
          ---------------------------------
          Owner of following bikes:
          1980 Suzuki GS550ET
          1977 Yamaha RD 250D
          1982 Kawasaki GPZ 750 R1
          1980 Suzuki GSX 250E

          Comment


            #6
            Another story that validates my decision to go with a Pingel tap a couple of years back. Having said that I am thankful that I am so anal about turning it off each time when I should.
            Larry

            '79 GS 1000E
            '93 Honda ST 1100 SOLD-- now residing in Arizona.
            '18 Triumph Tiger 800 (gone too soon)
            '19 Triumph Tiger 800 Christmas 2018 to me from me.
            '01 BMW R1100RL project purchased from a friend.

            Comment


              #7
              OIl drained - plugs out engine turned over and all fluid out.
              Will try again wemoto as i kinda like em and get the one for 50£.
              No pingel for this little bike but poss for my 550e if and when.

              Will update if i is just tap as im taking a risk as got too much to do to start on a carb refurb (even though
              i could do it in an eve)

              to do:

              oil in
              new petcock on and try it .....
              UKJULES
              ---------------------------------
              Owner of following bikes:
              1980 Suzuki GS550ET
              1977 Yamaha RD 250D
              1982 Kawasaki GPZ 750 R1
              1980 Suzuki GSX 250E

              Comment


                #8
                》 I so hope I havnt got floats that are
                wrong but I'm taking a punt at only the
                petxock . one ordered 35£. another risk
                but it had a good right up from.seller.
                (ebay non standard )
                on , res and prime and def fits.
                UKJULES
                ---------------------------------
                Owner of following bikes:
                1980 Suzuki GS550ET
                1977 Yamaha RD 250D
                1982 Kawasaki GPZ 750 R1
                1980 Suzuki GSX 250E

                Comment


                  #9
                  The float valves should hold the fuel back even if the petcock is leaking..... To get this you have to have leaks on both as stated above.
                  1980 GS1000G - Sold
                  1978 GS1000E - Finished!
                  1980 GS550E - Fixed & given to a friend
                  1983 GS750ES Special - Sold
                  2009 KLR 650 - Sold - gone to TX!
                  1982 GS1100G - Rebuilt and finished. - Sold
                  2009 TE610 - Dual Sporting around dreaming of Dakar.....

                  www.parasiticsanalytics.com

                  TWINPOT BRAKE UPGRADE LINKY: http://www.thegsresources.com/_forum...e-on-78-Skunk/

                  Comment


                    #10
                    Petcock ordered. hopefully a better one

                    needle valve / seat

                    OK so very likely fitting a new petcock
                    and needing a vacuum this should solve
                    what is happening BUT
                    not the underlying additional invisible issue.

                    I can whip the carbs off as I'm sure it's
                    not the hellish job as on my 550.
                    Would a clean up do or a new needle valve is needed ?
                    the needle valve seat ... nothing can be done about that?

                    I think my old gsx250e deserves more than half
                    a job so it's off with the carbs .
                    UKJULES
                    ---------------------------------
                    Owner of following bikes:
                    1980 Suzuki GS550ET
                    1977 Yamaha RD 250D
                    1982 Kawasaki GPZ 750 R1
                    1980 Suzuki GSX 250E

                    Comment


                      #11
                      Looked through box of parts and have 2 new
                      needle valves. Now just need time.
                      UKJULES
                      ---------------------------------
                      Owner of following bikes:
                      1980 Suzuki GS550ET
                      1977 Yamaha RD 250D
                      1982 Kawasaki GPZ 750 R1
                      1980 Suzuki GSX 250E

                      Comment


                        #12
                        I've not been into a GS250 carb, but the seats are replaceable on the larger bikes. I had a set of GS1100 carbs off & opened up 4 or 5 times trying to get the leak fixed. Finally discovered the "O" ring on the seat was the culprit.
                        1983 GS1100E, 1983 CB1100F, 1991 GSX1100G, 1996 Kaw. ZL600 Eliminator, 1999 Bandit 1200S, 2005 Bandit 1200S, 2000 Kaw. ZRX 1100

                        Comment


                          #13
                          Forgot how easy it is to get gsx 250
                          carbs out.
                          Quicker than having shave.

                          town for some tinnies and then I'll
                          strip the needle valves out and replace
                          it all while having a garden party sat in a chair.
                          UKJULES
                          ---------------------------------
                          Owner of following bikes:
                          1980 Suzuki GS550ET
                          1977 Yamaha RD 250D
                          1982 Kawasaki GPZ 750 R1
                          1980 Suzuki GSX 250E

                          Comment


                            #14
                            pulled the carbs.
                            removed floats , needle valve and of course
                            the tube thing that seats the needle valve
                            as per pic.
                            I used to be able to do this with my eyes shut
                            and forgot about the removable seat ..
                            .

                            anyway new seats don't fit and needle valves
                            too small. this from ebay years ago.

                            so old seats and valves back in for now
                            and I'll order from dealer. but will
                            risk new tap only.

                            20210724_201114_resize_66.jpg
                            UKJULES
                            ---------------------------------
                            Owner of following bikes:
                            1980 Suzuki GS550ET
                            1977 Yamaha RD 250D
                            1982 Kawasaki GPZ 750 R1
                            1980 Suzuki GSX 250E

                            Comment


                              #15
                              update :
                              Only place I can find needle valve and
                              bowl (seat) is cmsl 38€ each for
                              valve and seat per carb.

                              I hope a clean up will do and new
                              tap. Mad the price if carb bits!
                              UKJULES
                              ---------------------------------
                              Owner of following bikes:
                              1980 Suzuki GS550ET
                              1977 Yamaha RD 250D
                              1982 Kawasaki GPZ 750 R1
                              1980 Suzuki GSX 250E

                              Comment

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