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    GS1150 Oiled spark plugs

    I have always though the engine was oiling up plugs if it idled for too long.
    Mate looked at the plugs and said fuel.

    Standard 1150 with pods and 4 in to 1

    compression cold

    175 - 180 - 160 - 165

    main jets are 155
    pilot 47.5

    does this sound right?

    What is the recommended for this setup?
    thanks

    Current Bikes.... 81,1230Kat, 86,GSXR1100, 86,RG500, :D
    The 80`s - Back in the days when men looked like women, women dressed like whores and the music F@#KING ROCKED! http://d26ya5yqg8yyvs.cloudfront.net/friday.gif

    #2
    here are the factory spec for the 1150 carbs

    84 GS1150

    Type----------------- Mikuni BS36SS
    I.D. NO. -------------00A10
    Bore -----------------36mm
    Idle r/min----------- 1100+or- 100r/min
    Fuel level------------ 3.0 +- 0.5 mm
    Float height---------- 21.4 +- 1.0 mm
    Main jet ------------- #120(nos.1&4),#122.5(nos 2&3)
    jet needle------------ 5D14
    Needle jet ----------- X-3
    Pilot jet ---------------#45
    By pass--------------- 0.9,0.8,0.9 mm
    pilot outlet------------ 0.9 mm
    Valve seat------------ 2.0 mm
    Starter jet------------ #32.5
    Pilot screw------------ PRE-SET (2 turns back)
    Throttle valve--------- #130
    pilot air jet------------- #125
    Throttle cable play-----2-3 mm
    choke cable play-------0.5-1.0 mm



    those plugs look like your running very rich on the fuel mixtures and this is the good news because you can easily fix it by rejetting the bike
    if it was oil then you would be spending a lot more money to cure the problem

    The general "rule of thumb" for jetting increases will suggest you to go up 3 to 5 sizes for an exhaust system and 4 to 6 sizes for pods. Seeing as you have both, something in the range from 7 to 11 sizes larger than stock.
    so in your case you would want 142.5 for #1&4 and 145 for #2&3 and more than likely stock pilot jets
    those jet sizes are going up by 9 sizes so it should put you in the area where you can then start fine tuning it
    hope that helps

    Last edited by Guest; 04-15-2015, 07:33 AM.

    Comment


      #3
      That is running RICH, not burning oil.
      Ray.

      Comment


        #4
        Wow, those are some sooty plugs for sure. Way rich, not oil fouled.
        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.

        Comment


          #5
          Thanks guys for the replys.

          So based on the info..

          1&4 - 147 main
          2&3 - 149.5 main

          sound good?
          Current Bikes.... 81,1230Kat, 86,GSXR1100, 86,RG500, :D
          The 80`s - Back in the days when men looked like women, women dressed like whores and the music F@#KING ROCKED! http://d26ya5yqg8yyvs.cloudfront.net/friday.gif

          Comment


            #6
            Are they mikuni jets or dynojet ? Makes a big difference
            sigpic1982 gs750e 1186 oil cooled engine USD front mono shock rear
            1994 gsxr1100w
            1981 gs1260dragbike (this one I've owned for29yrs)

            Comment


              #7
              Do you have a jet kit or just standard needle?
              GS\'s since 1982: 55OMZ, 550ES, 750ET, (2) 1100ET\'s, 1100S, 1150ES. Current ride is an 83 Katana. Wifes bike is an 84 GS 1150ES

              Comment


                #8
                Has anyone played around with one step hotter on plugs? Issues with pre-ignition at all?
                "Thought he, it is a wicked world in all meridians; I'll die a pagan."
                ~Herman Melville

                2016 1200 Superlow
                1982 CB900f

                Comment


                  #9
                  Changing the heat range of the plugs is just a "Band-Aid". Fix the real problem, instead.

                  What brand of pods do you have? Yes, it makes a difference in jetting.

                  What 4-into-1 do you have? What baffle is in it? Yes, it makes a difference in jetting.

                  Where are you coming up with strange jet sizes like 147 and 149.5?

                  Using that "rule of thumb" that was presented earlier, you might need something in the 135-145 range, if using Mikuni jets.
                  If you are using Dynojet parts, they would be 144-154, and there is usually no need to increase the pilots, so 45s should work just fine there.

                  .
                  sigpic
                  mine: 2000 Honda GoldWing GL1500SE and 1980 GS850G'K' "Junior"
                  hers: 1982 GS850GL - "Angel" and 1969 Suzuki T250 Scrambler
                  #1 son: 1986 Yamaha Venture Royale 1300 and 1982 GS650GL "Rat Bagger"
                  #2 son: 1980 GS1000G
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                  Want a copy of my valve adjust spreadsheet for your 2-valve per cylinder engine? Send me an e-mail request (not a PM)
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