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'83 GS750T - Starting Issue - Post Carb Clean

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    #1

    '83 GS750T - Starting Issue - Post Carb Clean

    I'm having starting problems with my 1983 GS750T that have developed after doing a full carb clean. Once started, it runs great.

    Problem:

    Does not start without 'nurturing'. I crank it with full choke and 3/4 of the plugs remain bone dry.

    I can coax her to start by putting a few drops of fuel in the cylinders and then starting with full choke.

    Once she gets going, she runs just fine. Idles smoothly. Runs well on the road. No issues.

    Other then starting.

    Prelude:

    This issue has arisen immediately after doing a complete carb clean (awesome guide! Thanks!). Upon reassembly, the starting issue began.

    Solution:

    Thoughts? Comments? Personal attacks?


    Thanks!
    Tags: starting
    #2
    sounds like you have either got blocked pilot passages still or you have not set your air/fuel mixture screws correctly. what have you set them too?
    1978 GS1085.

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

    Comment

      #3
      The "choke" system is fed by little hole in bottom of fuel bowl and then a small tube that runs up into carb throat. After cleaning, did you poke and blow these out? I use spray gumout- wear glasses!
      1981 gs650L

      "We are all born ignorant, but you have to work hard to stay stupid" Ben Franklin

      Comment

        #4
        When is the last time the valve clearances were checked?

        True, they should not be changed by cleaning the carbs, but cold starting problems are aggravated by tight valves.

        .
        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)
        (Click on my username in the upper-left corner for e-mail info.)

        Comment

          #5
          I concur with Tom on blowing out your choke tubes- I use an old guitar string (G) as well and Steve is spot on with the valves- A little Marvel Mystery oil will help lube everything up in that carb added to the gas and keep you running awesome. We can't have a "T" with starting trouble- they love to run!!!!!!

          Comment

            #6
            Greetings and Salutations!!

            Hi Mr. thester,

            Start here:

            How To Properly Clean Carbs (by Mr. Nessism), PDF file.

            Then move on to the maintenance lists in your "mega-welcome". Skipping steps and taking shortcuts will be frustrating at best and dangerous at worst.

            If you are here you probably have a 30 year old motorcycle that needs about 20 years worth of maintenance. You'll find all kinds of helpful tips, procedures, manuals, diagrams, "how-to" guides, etc, in the links below. Let's get started.

            Let me dump a TON of information on you and share some GS lovin'.

            I just stopped by to welcome you to the forum in my own, special way.

            If there's anything you'd like to know about the Suzuki GS model bikes, and most others actually, you've come to the right place. There's a lot of knowledge and experience here in the community. Come on in and let me say "HOoooowwwDY!"....

            Here is your very own magical, mystical, mythical, mind-expanding "mega-welcome". Please take notice of the "Top 10 Common Issues", "Top 15 Tips For GS Happiness", the Carb Cleanup Series, and the Stator Papers. All of these tasks must be addressed in order to have a safe, reliable machine. This is what NOT to do: Top 10 Newbie Mistakes. Now let me roll out the welcome mat for you...



            Please Click Here For Your Mega-Welcome, chock full of tips, suggestions, links to vendors, and other information. Then feel free to visit my little BikeCliff website where I've been collecting the wisdom of this generous community. Don't forget, we like pictures! Not you, your bike!

            More links to helpful threads in the forum:
            Help! Your Bike Won't Start
            DON'T DO THESE THINGS
            Help! Your Bike Won't Run Well
            Oh God! Pods!


            Thanks for joining us. Keep us informed.

            Thank you for your indulgence,

            BassCliff

            Comment

              #7
              Wow!...Thanks for all the fantastic resources!

              Basscliff: your site is rather steeped in awesome!

              After much reading I now know much more about how Carbs work, and have an idea how to move forward.

              I pulled the carbs back off and am recleaning them; this time paying more attention to the tine passage ways in the pilot and starter circuit.

              One error on my first attempt is that I only soaked the parts for about 20 min each rather that a good 12-24 hrs.

              My current working theory is that the short soak was enough to loosen deposits in the starter circuit without fully dissolving them. That would explain why she's having trouble getting fuel to start.

              Thanks again for the help, and I'll let you know how it turns out.

              Comment

                #8
                Post what you learn. I've got the exact same problem!

                Comment

                  #9
                  Well I am up and running now!

                  I pulled the carb and soaked each one for 24 hrs. Took extra time to clean out all the tiny holes with the 'special tool' and cleaned it them out with compressed air.

                  Reassembled and immediately started!

                  Huzzah!

                  Now, thanks to one Mr. BassCliff, I now have a whole list of things to work through

                  Thanks for all the help!

                  Comment

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