1980 gs850g bogging at 4K

Collapse
X
Collapse
 
  • Page of 1
  • Time
  • Show
Clear All
new posts
Previous template Next
  • jlyon40
    • Jan 2026
    #1

    1980 gs850g bogging at 4K

    Hi my dad has an 80? 850g and it has started to bog down when it hit around 4-5k RPM. At first it only bogged down when he was driving but now it?s doing it when in neutral as well. We went through all 4 carburetors and cleaned them out and all the pilots were clear and everything. It?s like the bike isn?t getting enough gas. Could it be something else in the carbs is sticking or not sliding? Thanks
    Tags: None
    • solarae
      Forum Apprentice
      • Oct 2017
      • 64
      • Fieldbrook, CA
      #2
      Mid range bogging can be due to needle problems. Have you checked the diaphragms?
      2003 SV650 full fairing on a formerly naked bike so it has handlebars, not clipons
      1995 Yamaha XT225
      2007 Yamaha XT225
      1981 GS250T Cafe

        Comment

        • bwringer
          Forum LongTimer
          Bard Award Winner
          GSResource Superstar
          Past Site Supporter
          Super Site Supporter
          • Oct 2003
          • 17066
          • Indianapolis
          #3
          How's the airbox and air filter?
          1983 GS850G, Cosmos Blue.
          2005 KLR685, Aztec Pink - Turd II.3, the ReReReTurdening
          2015 Yamaha FJ-09, Magma Red Power Corrupts...
          Eat more venison.

          Please provide details. The GSR Hive Mind is nearly omniscient, but not yet clairvoyant.

          Celeriter equita, converteque saepe.

          SUPPORT THIS SITE! DONATE TODAY!

          Co-host of "The Riding Obsession" sport-touring motorcycling podcast at tro.bike!

            Comment

            • tom203
              Forum Guru
              Past Site Supporter
              • Aug 2010
              • 8925
              • Norway,Maine
              #4
              "It?s like the bike isn?t getting enough gas"

              suspect the petcock...hopefully your model does not have the deluxe leverless version
              1981 gs650L

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

                Comment

                • jlyon40
                  #5
                  I think we?ve narrowed it down to being a carb issue. The air box and filter are both good and we checked to make sure it wasn?t the peacock by putting the tank from my bike on and it was still bogging. Going to have to go through the carbs very thoroughly and find out what?s going on there. Thanks for all the input.

                    Comment

                    • Guest
                      #6
                      Originally posted by jlyon40
                      I think we?ve narrowed it down to being a carb issue. The air box and filter are both good and we checked to make sure it wasn?t the peacock by putting the tank from my bike on and it was still bogging. Going to have to go through the carbs very thoroughly and find out what?s going on there. Thanks for all the input.
                      Have you verified that the advance mechanism isn't stuck on retard? It advances at about 4,000......

                        Comment

                        • Steve
                          GS Whisperer
                          • Jun 2005
                          • 35924
                          • southwest oHIo
                          #7
                          Originally posted by tom203
                          ...hopefully your model does not have the deluxe leverless version
                          The G models that year were thankfully spared that abomination.

                          .
                          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
                              Originally posted by jlyon40
                              Hi my dad has an 80’ 850g and it has started to bog down when it hit around 4-5k RPM. At first it only bogged down when he was driving but now it’s doing it when in neutral as well. We went through all 4 carburetors and cleaned them out and all the pilots were clear and everything. It’s like the bike isn’t getting enough gas. Could it be something else in the carbs is sticking or not sliding? Thanks
                              Stock intake and exhaust? Stock jetting? What throttle setting(s) is it happening at? The RPM usually isn't as important as the throttle setting as that determines which carb circuit you are running on. Will it pull through the bog if you give it full throttle? What happens if you hit the choke while it is bogging?


                              Mark

                                Comment

                                Previous template Next
                                Working...