Another starting problem question, sorry.

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  • UK-GT
    • Jan 2026
    #1

    Another starting problem question, sorry.

    If my GS650GT has been left for a week or more, she is a pig to start, I pull the choke out, press the button and she fires into life, then she dies and it takes ages to get her going again.
    If I go to start her today, after I started her up a couple of days ago, I pull the choke out, press the button and she fires up and runs sweet.
    She has got a new battery, carbs have been stripped and cleaned (new 'O' rings fitted as well), pistons re-ringed and cylinders honed, new valve stem seals and valve shims checked (130-140psi compression). New R/Regulator, new spark plugs (all 4 are a mid brown colour), stock Air Filter, Motad 4-1 exhaust, new fuel & vacuum lines as well as pet-cock re-build (tank clean and their was no deposits on the internal pet-cock filter).

    Before I try to start her after she has been standing should I put the fuel tap to prime for 30seconds, then start her and switch the tap back, would this work/cause any problems?
    Tags: None
    • GS/GR PAUL
      #2
      Often when I have left my bike for a few weeks/months I put it on prime for about 20 seconds.

        Comment

        • tkent02
          Forum LongTimer
          Past Site Supporter
          • Jan 2006
          • 35571
          • Near South Park
          #3
          That's what prime is for.
          http://img.photobucket.com/albums/v5...tatesMap-1.jpg

          Life is too short to ride an L.

            Comment

            • Steve
              GS Whisperer
              • Jun 2005
              • 35924
              • southwest oHIo
              #4
              I don't usually have that much fuel loss from the bowls in that short a time, but as said, "that is what PRIme is for".

              Turn it to PRIme while donning your helmet, start the bike, put the petcock back to RUN, then ride.

              .
              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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                Comment

                • Charlie G
                  Forum Guru
                  Past Site Supporter
                  Super Site Supporter
                  • Feb 2009
                  • 6440
                  • Siskiyou county
                  #5
                  Anymore than 4 days I put it on prime for a minute or two.

                  cg
                  sigpic
                  83 GS1100g
                  2006 Triumph Sprint ST 1050

                  Ohhhh!........Torque sweet Temptress.........always whispering.... a murmuring Siren

                    Comment

                    • tkent02
                      Forum LongTimer
                      Past Site Supporter
                      • Jan 2006
                      • 35571
                      • Near South Park
                      #6
                      How fast it evaporates depends a lot on the climate and the fuel formulation.
                      http://img.photobucket.com/albums/v5...tatesMap-1.jpg

                      Life is too short to ride an L.

                        Comment

                        • UK-GT
                          #7
                          Thanks for the info. Learn something new everyday. Now, can I leave her alone for over a week to try this out, probably not. Mind you I am fitting new brake lines, replacing the fork oil and painting the calipers next weekend as its a bank holiday, mind you I have not told the wife yet, she might have an idea what I have got planned though as she bought me the brake lines

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