Rubber jet plug?

Collapse
X
Collapse
 
  • Page of 1
  • Time
  • Show
Clear All
new posts
Previous template Next
  • whalford1
    • Jan 2026
    #1

    Rubber jet plug?

    I'm in the process of working on my 1982 GS1100GL carburetors. With the float bowl removed, there is a rubber plug that is inserted in to one of the holes for one of the jets on each carb.

    (1) What's the name of this jet??

    (2) What is the reason and/or function of the plug?

    (3) Is there anything to be gained by removing the plug?

    Thanks, William.
    Tags: None
    • Katarat
      #2
      That's the pilot jet plug, it allows the pilot circuit to draw off the main I believe. Leave it alone, it wont run worth a crap without it. Others may be able to give a better explanation but it needs to be there

        Comment

        • 850 Combat
          Forum Guru
          Past Site Supporter
          • Sep 2006
          • 6018
          • Spokane, WA, and Hampden, ME
          #3
          It is the pilot jet. The pilot jet is fed through the main jet on that bike. You need the plug for it to work. It seems odd, but that is how it is designed.
          sigpic Too old, too many bikes, too many cars, too many things

            Comment

            • Steve
              GS Whisperer
              • Jun 2005
              • 35924
              • southwest oHIo
              #4
              Don't know the official name, but it's generically known as the "rubber plug".

              Yes, there is something to gain by removing it.

              You will gain a poorly-running bike that will not run above an idle.

              .
              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

                • whalford1
                  #5
                  Thanks guys. I wanted to be sure that I needed to keep them before I reassembled the carbs.

                    Comment

                    • Guest
                      #6
                      If they're hardened & don't fit "firmly" into that hole, they must be replaced. You don't want them falling out when you're on the road.

                        Comment

                        • Steve
                          GS Whisperer
                          • Jun 2005
                          • 35924
                          • southwest oHIo
                          #7
                          Originally posted by nastyjones
                          If they're hardened & don't fit "firmly" into that hole, they must be replaced. You don't want them falling out when you're on the road.
                          The only way they are going to fall out when on the road is if the float bowl falls off.

                          If that happens, losing the rubber plug is the least of your problems.

                          .
                          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

                            • Guest
                              #8
                              What Steve Said-

                              Actually, the inside of the bowl itself has an 'extrusion' as part of the casting which keeps the rubber plug set in place, of course, if the plug got really hard, it might allow more fuel into that pilot jet circuit.

                                Comment

                                • GateKeeper
                                  #9
                                  In other words they must be there, and if they are crappy, replace them.....

                                  It's just one less thing to worry about...

                                  .

                                    Comment

                                    • whalford1
                                      #10
                                      When I took them out, they all were tight enough to not come out real easily. Fortunately, I have a spare set of carbs that I can rob parts off of, just in case I need some.

                                        Comment

                                        • GelandeStrasse
                                          #11
                                          Originally posted by 850 Combat
                                          It seems odd, but that is how it is designed.
                                          It's the result of "manufacturing process" I think. A hole must be drilled so the pilot jet can be installed/removed but the fuel delivery system requires there to be no hole so the rubber plug is used .... I think!

                                            Comment

                                            Previous template Next
                                            Working...