intake backfire, no rev

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  • zacheriaj
    #1

    intake backfire, no rev

    82 gs550m katana. Just put pod filters on. valves recently adjusted, oil change, carbs clean and synched. Yes they are REALLY clean. I know the carb was previously rebuilt. i have a v&h 4-1 on it as well. I'm sure its just running lean because of the pods. The main jets say (9.25) on them. what does this mean? size i would presume. do i need to get a stageIII dynojet kit or does it already have one in it? Thanks for the help!
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    • hampshirehog
      Forum LongTimer
      Past Site Supporter
      • Oct 2007
      • 12675
      • Hampshire. UK
      #2
      That's not 9.25 but 92.5 - standard mains for your bike. I don't think the Dynojet is available for the GS550M but if you can find a kit somwhere it might be the easiest route for you (other than popping the original airbox back on). Otherwise you're in to tuning your carbs - new jets, playing about with the needles etc - fun.
      79 GS1000S
      79 GS1000S (another one)
      80 GSX750
      80 GS550
      80 CB650 cafe racer
      75 PC50 - the one with OHV and pedals...
      75 TS100 - being ridden (suicidally) by my father

        Comment

        • zacheriaj
          #3
          Originally posted by hampshirehog
          That's not 9.25 but 92.5 - standard mains for your bike. I don't think the Dynojet is available for the GS550M but if you can find a kit somwhere it might be the easiest route for you (other than popping the original airbox back on). Otherwise you're in to tuning your carbs - new jets, playing about with the needles etc - fun.
          so is there a way to richen it up enough without changing to dyno?

            Comment

            • Guest
              #4
              Do not ride it like this.
              Go up one on the pilot jet EX 40-42.5
              I'd go up to at least a 110 on the main jet (to start)
              Shim the needle to richen the needle circuit.

                Comment

                • tlepac
                  #5
                  Just a question---Why not go back to the airbox and go standard? Seems like that would be a LOT less fuss

                  My 2 c worth

                    Comment

                    • zacheriaj
                      #6
                      Originally posted by tlepac
                      Just a question---Why not go back to the airbox and go standard? Seems like that would be a LOT less fuss

                      My 2 c worth
                      seems alot more simple to remove and install carbs with pods haha. probably gain a few HP by raising jet size and pod filters as well. not much to account for but its the thought that counts?

                        Comment

                        • tkent02
                          Forum LongTimer
                          Past Site Supporter
                          • Jan 2006
                          • 35571
                          • Near South Park
                          #7
                          Faulty logic.
                          Getting it to run right takes a LOT of tuning.
                          http://img.photobucket.com/albums/v5...tatesMap-1.jpg

                          Life is too short to ride an L.

                            Comment

                            • zacheriaj
                              #8
                              Originally posted by tkent02
                              Faulty logic.
                              Getting it to run right takes a LOT of tuning.
                              i understand that its alot of work, but tons of guys here put pods on. so it must be worth it?

                                Comment

                                • Guest
                                  #9
                                  3314 is the Dynojet part number for your bike.
                                  Dynojet Motorcycle Jet Kit
                                  http://www.dynojet.com/jetkits/motorcycle/suzuki.aspx
                                  Develop a great plan for boosting your motorcycle’s performance by using our convenient, reliable motorcycle carburetor Jet Kits available online. Once you see these kits in action, it will become clear why they’re the products that started the Dynojet fuel tuning legacy. They’ll effortlessly increase power and smoothness throughout the entire rev range. Whether your bike is stock, heavily modified, or created for high-speed racing, our Jet Kits can tune your air/fuel ratio to perfection. Not only will our motorcycle Jet Kits drastically improve your performance, but they’ll also show immediate results. With an increased power output of 5-8% and a fully adjustable design, our kits are the perfect companions to any rider. Expand your vehicle’s performance capabilities today with them.

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