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Super poor fuel economy

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  • Super poor fuel economy

    I just got back from Biketoberfest and my 2000 1600 with bak and Mac fatt stakkers exhaust with baffles installed is sucking (literally) on fuel. From a full tank after 50 miles of riding the tank is near empty. On the kickstand when you look in the tank I see the bottom of the tank. I did do the barons jet kit. Used the smaller main it came with and installed a 37.5 pilot. Clip on needle on 5th from top with the plastic spacer/ washers where they are supposed to be. Along with the spring under the white clip that holds the needle in place. Pms 2.5 turns out. I haven’t gotten to it yet but I do have a new choke plunger. I need a new cable as well as it is cracked right where the cable meets the plastic knob. I never need the choke to start her and the plugs were dark dark black. So my main question is, will a faulty choke plunger / choke cable make me go through an entire tank in 50 miles?

  • #2
    Yes, if the plunger is stuck open you will go thru the fuel. You should’ve seen dark smoke when it’s running.

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    • #3
      You should be setting the needle at the 4th clip from the top. That will help to run leaner and more in the ball park.

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      • #4
        I don't understand your needle stack up. It should be clip in the 4th groove down from the flat end, 1 washer and 1 white plastic spacer below the clip. The spring and other washer should set on the top of clip not next to the plastic spacer.

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        • Kmartcivic
          Kmartcivic commented
          Editing a comment
          I do have the washers/plastic spacer in that orientation. It’s on position 5 out of the 6 grooves as the barons instructions say. It says to put on 4th groove on the 1700 model.

      • #5
        trust me put it on the 4th groove. There are 2 different sets of instructions out there. I have both sets and don't understand why they put out 2 different sets that aren't the same. The instructions also say to use a 35 pilot jet and with many hours of test it has been found that a 37.5 works best in a 1600 and a 40 works best in a 1700. They must be trying to cover up a lean spot with the 5th groove clip setting instead of changing the pilot jet.

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        • #6
          If your starting wo choke . Too rich and or enricher circuit open inside carb. Especially since yesterday we dropped below 70 at night. Dave j is our jetting professor.

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          • #7
            I'll mess with it this weekend and give an update on my findings.

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            • #8
              Alright, so I put the correct main jet in the carb. Along with a new Choke cable and plunger. Got an aftermarket one. Yamaha is nuts what they charge for a damn choke cable! Put it all back together and started her up. When I crank on the throttle I still get some black smoke out the back. Then I realized I never changed the clip setting on the needle. So I just left it at that since I put the tank back on. I brought my bike to my work to get the Trans recall taken care of now that the bike is finally in YMUS. Was from Hawaii so my VIN would not populate. So when my tech pulls my bike apart I'll change my clip setting on the needle.

              Comment


              • #9
                dont go by the gas guage as any indication, reset odo with fillup, calculate.

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