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Do I have a DynoJet kit installed?

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    #1

    Do I have a DynoJet kit installed?

    Basically wanting to figure out if I already have the parts installed.

    The bike had some mods already when I got it and I am told it ran well when it was parked, I never saw it.

    Has a 4-1 already, so it may have more mods... Want to make sure before I drop a few hundred on a dynojet kit.
    Tags: None
    #2
    two ways to check, see if the needles that are installed have grooves to raise e and lower the needle. Take of the 4 screws on top of one of the carbs and you should be able to answer the question in 5 minutes with it back together in 10.

    The other way is to pull a float bowel and look at the size of the main jet.

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      #3
      the main jet will also have the letters D and J on it before the size

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        #4
        So I have 125 jets installed.

        I will be running pods and a stock exhaust.

        Any thoughts on if these jets will work? Don't want to be too lean.

        Comment

          #5
          You can find the complete parts lists at the dynojet site. The 3133 is the one you would get.

          Pods make the biggest difference interms of flow. The combination of 4:1 and pods will probably want you around 132 DJ mains.

          Jet Kit for 1980-1986 Suzuki GS1100
          http://www.dynojet.com/pdf/3133.pdf
          Dynojet Jet Kits Whether you run a standard motorcycle, or a tuned sportbike, Dynojet Carburetor Jet Kits can provide you with a simple and affordable solution to all your carburetion problems. Dynojet Jet Kits increase power and smoothness throughout the entire rev range, while maintaining optimum fuel economy. Each Dynojet Jet Kit includes comprehensive instructions which show step-by-step installation and testing procedures to ensure a perfect setup every time. This is backed by free telephone and Internet support to Dynojet customers. Kit installation and Dynamometer services are available in many parts of the world. Please see the Dynamometer Center Search Page to locate your nearest dyno shop. Read Full Description Jet Kit Types Needle & Needle Jet Caps Many newer bikes have very flat power and fuel delivery curves when used with the stock exhaust and air-box. When aftermarket pipes are used, the power curve is usually not flat. You find the need to lean out for low speed and richen up for top end; or leaner on the top end and richer at the low speed. In order to achieve full function and driveability, Dynojet develops shrouds or cap style nozzles for adjusting the upper or lower top end. They also have an effect similar to fuel injection by breaking up the fuel as it enters the air stream. Fuel Needle The design of the needle is where Dynojet spends most of its R&D time. The needle is designed to give the correct amount of fuel throughout the mid-range and is also designed to allow adjustment from groove 1 to groove 6 with little or no effect below 3000 R.P.M.; then with the correct end dimensions, the needle will have little effect on the main jet regardless of needle position. This isolates all circuits from each other and ensures easy set-up of the midrange and driveability. Main Air Jet This jet allows air into the emulsion tube to mix with fuel being drawn up from the float bowl. It controls the amount of fuel which can be pulled from the float bowl into the venturi. The larger the size of the main air jet, the more air you get and less fuel. The smaller the main air jet, the more fuel you get and less air. Dynojet alters this only to achieve the flattest possible fuel delivery curve. Pilot Circuit This controls 100% of the engine idle and 25% of the transition onto the needle. Dynojet has found that the engine will idle with the standard pilot jet, with or without the air-box and with the slides and needles removed from the carburetors; therefore we never change the pilot jet. Doing so is proof that you are not using the other circuits correctly. Idle and off idle is controlled by the mixture screws and the float level which have the most positive effect below 4000 R.P.M. On some models the pilot air jet is changed to provide optimum fuel economy. Correct balancing of the carburetors also ensures a smooth idle. Main Jet We develop our main jets to correctly serve two functions; static load and dynamic load. The static load is the fuel received through the main jet in the upper gears, where the tachometer is moving very slow. The dynamic fueling portion of the main jet is the amount of fuel received from the jet in the mid-range potion of the power. For example, you have a GSXR1100 G,H with #130 main jets. You then install #125 mains. After running the bike you notice the top end has improved but the mid-range doesn't pull as well. You then install #135 mains and you notice the mid-range is great but the top end is slower. This is a common compromise when using stock main jets and needles. If you install Dy 93 Dealers Orders Dealer Orders "Dealer Orders Dynojet Research Inc. dealers much call in to place an order. Please call us at: 1-800-992-4993 (Toll Free)/Suzuki/GS1100/1986



          The next thing to figure if you have Dyno jet mains or Mikuni mains. They are roughly related as below:

          DJ = Mikuni+10

          So if you have Mikuni 125's now then you are set for Pods and 4:1 already. If not then you will likely need to step it up. But sound like someone was already going some jetting problem now if to know what needles you have. Are the DJ?

          Comment

            #6
            That's a good size main for those mods but what are the spark plugs telling you?
            Get the Dynojet kit for the needle and drill the slide or you won't be happy with the pods.
            1983 GS 1100E w/ 1230 kit, .340 lift Web Cams, Ape heavy duty valve springs, 83 1100 head with 1.5mm oversized SS intake valves, 1150 crank, Vance and Hines 1150 SuperHub, Star Racing high volume oil pump gears, 36mm carebs Dynojet stage 3 jet kit, Posplayr's SSPB, Progressive rear shocks and fork springs, Dyna 2000, Dynatek green coils and Vance & Hines 4-1 exhaust.
            1985 GS1150ES stock with 85 Red E bodywork.

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              #7
              I dont see any markings on the needle.

              Any clearer explanation on how to tell the size of the needle?

              Comment

                #8
                Is the needle tapered with notches where the clip and spacers go?
                If not bite the bullet
                1983 GS 1100E w/ 1230 kit, .340 lift Web Cams, Ape heavy duty valve springs, 83 1100 head with 1.5mm oversized SS intake valves, 1150 crank, Vance and Hines 1150 SuperHub, Star Racing high volume oil pump gears, 36mm carebs Dynojet stage 3 jet kit, Posplayr's SSPB, Progressive rear shocks and fork springs, Dyna 2000, Dynatek green coils and Vance & Hines 4-1 exhaust.
                1985 GS1150ES stock with 85 Red E bodywork.

                Comment

                  #9
                  Mikuni jets



                  Dynojet needles (the ones with the grooves)

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