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Are PILOT JET PLUGS a must on carbs ?

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    #1

    Are PILOT JET PLUGS a must on carbs ?

    I still have all the original rubber plugs from the pilot jets but after cleaning the carbs the don't fit as snug as they did pre-cleaning.

    Are these things even necessary to be put back on or will they work just fine without the plugs ?

    Thanks.
    Tags: None
    #2
    you need them... the float bowls have a "step" on the inside that keeps them from falling out.
    '85 GS550L - SOLD
    '85 GS550E - SOLD
    '82 GS650GL - SOLD
    '81 GS750L - SOLD
    '82 GS850GL - trusty steed
    '80 GS1100L - son's project bike
    '82 GS1100G - SOLD
    '81 GS1100E - Big Red (daily rider)

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      #3
      Yes, you need them. The float bowl actually holds them down so if they to seem a little loose it's ok.
      1983 GS 1100E w/ 1230 kit, .340 lift Web Cams, Ape heavy duty valve springs, 83 1100 head with 1.5mm oversized SS intake valves, 1150 crank, Vance and Hines 1150 SuperHub, Star Racing high volume oil pump gears, 36mm carebs Dynojet stage 3 jet kit, Posplayr's SSPB, Progressive rear shocks and fork springs, Dyna 2000, Dynatek green coils and Vance & Hines 4-1 exhaust.
      1985 GS1150ES stock with 85 Red E bodywork.

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        #4
        what exactly do they do anyways? and why are they necessary? I had them on my 900C, and my friends kanotuna.

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          #5
          If you look carefully, there is a passage between the pilot tunnel and the main jet tunnel. With the rubber plugs in place, all the gas has to go through the main jet. As the throttle is openend and the pilot jet useage is reduced as more goes through the needle circuit (which is directly above the main jet), all the gas still has to go through the main jet. Without the rubber plug, additional, unmetered gas can also come through that small opening between the tunnels.

          Yes, you need the rubber plugs.

          .
          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
          Family Portrait
          Siblings and Spouses
          Mom's first ride
          Want a copy of my valve adjust spreadsheet for your 2-valve per cylinder engine? Send me an e-mail request (not a PM)
          (Click on my username in the upper-left corner for e-mail info.)

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            #6
            nice explanations... thanks

            Comment

              #7
              You ask. We answer. Just telling it like it is.

              .
              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
              Family Portrait
              Siblings and Spouses
              Mom's first ride
              Want a copy of my valve adjust spreadsheet for your 2-valve per cylinder engine? Send me an e-mail request (not a PM)
              (Click on my username in the upper-left corner for e-mail info.)

              Comment

                #8
                The GS850 manual on the Bike Cliff site has good information on that. I didn't know the pilots were fed from the main until I lookad there.
                sigpic Too old, too many bikes, too many cars, too many things

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