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  • Starting Problems

    My '02 is Pumpless , with Grizzly valve , BAK airfilter , Cobra Longshots , 170 mainjet , 37.5 pilot . Runs Great once it starts . That's the problem . Cold start with Full Enricher pulled out it starts after a couple seconds of cranking . After its hot and shut down , it's pretty hard to restart , takes some throttle twisting . Any idea what the problem might be ? My '01 has me very Spoiled , Half a turn cold and it's running , same for restart when hot .



  • #2
    When you say throttle twisting do you mean you are adding fuel thru the accelerator pump or are you just holding it open?

    Comment


    • Horsehammerr
      Horsehammerr commented
      Editing a comment
      Adding thru accelerator pump

  • #3
    Accelerator pump not working correctly or some passage in carb plugged?
    LET'S RIDE

    Comment


    • Horsehammerr
      Horsehammerr commented
      Editing a comment
      AC.Pump squirting good steady stream.

  • #4
    You could be having a starter issue also. Mine would crank and crank and I’d have to give it a couple of throttle twists to get it to fire. More so when it was cold but would have issues also after warm. Might need new brushes/starter and if you haven’t add the upgraded wires.

    Comment


    • Horsehammerr
      Horsehammerr commented
      Editing a comment
      Brand new Starter

  • #5
    Try readjusting the tps.

    SORRY, I meant the PMS screw.
    Last edited by Duke; 09-08-2020, 01:42 PM. Reason: Sorry, I meant the PMS screw.

    Comment


    • Horsehammerr
      Horsehammerr commented
      Editing a comment
      Guide me through that please

  • #6
    With hot engine, set idle, then listen closely while adjusting the PMS screw in and out. You are trying to get the highest idle archived. When your sure that you have the highest idle, then screw out 1/8 of a turn.
    Done.

    Comment


    • #7
      Did all that and still gotta twist the throttle to get it to start .

      Comment


      • #8
        Did you try a cold start without enricher pulled full?

        Comment


        • #9
          Are you using the enricher at all after the bike has been run? You may need to use the enricher even after a stop as short as a 1/2hr. If I stop for a short time like that I pull the choke to start and then push it back in immediately after starting.

          Comment


          • #10
            You should never have to touch the throttle to get the bike to start under any condition. If you have to do that, you have other issues.

            Comment


            • Horsehammerr
              Horsehammerr commented
              Editing a comment
              This is exactly why this is BUGGING me . Why is it nescessary to use my throttle to get this motor to start ? What is the problem ? Once it's running it runs Great in all gears and speeds.

          • #11
            You never answered my question above about pulling the choke to start instead of twisting the throttle.

            Comment


            • Horsehammerr
              Horsehammerr commented
              Editing a comment
              Yes I have tried using the enricher at different settings and this doesn't seem to effect the problem , BUT , I just went out to my Bike Shed and found all 5 gallons of Gas Drained on the floor ! Drained right through the Carb . I guess a stuck float valve can be a BITCH to correct starting ? Just put 2 oz. of Techron Gas treatment in this fillup. Will pull bowl and check it out . Could Float level affect starting ?

          • #12
            Yes. If it is overflowing and actually flooding instead of starving for fuel. Although twisting the throttle is adding more fuel it is also adding more air if you are holding it open while cranking. That is the direction I was going in, in my first question of this thread.

            It's a good thing you store it in a shed and not an attached garage

            Comment


            • Horsehammerr
              Horsehammerr commented
              Editing a comment
              That is EXACTLY Why I use a detached shed . I've seen the other result . Still freaks me a little to turn on the lights .

            • Horsehammerr
              Horsehammerr commented
              Editing a comment
              I am lowered at the rear of this Bike 1 1/2" , Should this Float level be different ?

          • #13
            Lowered bike will effect the float level, but very, very little.
            Do you have a inline filter on your bike?

            Comment


            • Horsehammerr
              Horsehammerr commented
              Editing a comment
              No , clear fuel line all the way . I think there's something in my float valve . Was over flowing before and just quit . Well it's back .

          • #14
            You should ALWAYS have a in-line gas filter. There is no telling what kind of debris is in the station's tanks or in the tanker that brings the fuel from the refinery. Years ago, I got a load of contaminated fuel in my truck from a fuel delivery that hadn't properly purge the trailer. I couldn't prove the contaminated fuel came from the station that I had filled up at, so I had to absorb the cost of cleaning my fuel system, replacing the filter, etc. at a time when income was VERY tight!Neeless to say (but I'll do it anthow) I never bought gas at that station afterwards! Also, since your bike is now pumpless, get into the habit of turning off the petcock after riding...it'l prevent the spiull you experienced (just don't forget to turn it back on, when you get ready to ride again!( I almost drained the battery on my '07 before I remembered to check the position of my fuel petcock! Thankfully, no one noticed my screw-up but ME)!

            Comment


            • #15
              Not trying to contradict BoomerA, but I have run pumpless 6 years with no in line filter, the only filter I have is the one inside the tank covering the petcock feed tubes (stock). Also, I have never shut off my fuel in those 6 years. Guess I'm just lucky.

              Comment


              • Horsehammerr
                Horsehammerr commented
                Editing a comment
                That is exactly how my '01 is and it works perfectly for the last 5 years. I' m pulling the float bowl today on this'02 . Think its got CRAP in it !

            • #16
              Is there supposed to be a washer between the head of the screw that holds the float pivot pin and the pivot pin ? I know when I installed the Grizzly Valve I put the screw directly on the pin. Could this be binding the Float ?

              Comment


              • Duke
                Duke commented
                Editing a comment
                It should be only a screw. No washer. Make sure that nothing will bind the float hinge. Hinge pin stays stationary.

              • davej
                davej commented
                Editing a comment
                I just explained that to someone else in another thread about a week ago. I found a carb that had a washer screw holding the float pin and jamming the float intermittently

              • Horsehammerr
                Horsehammerr commented
                Editing a comment
                For some reason this Float valve is sticking open . Drained 5 gallons on the floor overnight in the Bike Shed !

            • #17
              sent PM to Duke

              Comment


              • #18
                Set the float.
                This is what davej, and Doc_V showed me, and it works great. I just did this the other day and then checked it to what the book says to do. It was right on the mark. Thank you davej and Doc_V.
                First make sure the o-ring for the float needle seat is in good condition. When setting the float, have the carb upside down, and set the float where the float seam-line is parallel with the carburetors bowl seam-line. That's where the valve needs to be fully closed. When setting it, use a hose to blow from your mouth into the fuel inlet as you move the float up and down. Air should be stopped when the float is parallel with the bowl.

                Comment


                • Horsehammerr
                  Horsehammerr commented
                  Editing a comment
                  Thank You ! I'm on it .

                • Horsehammerr
                  Horsehammerr commented
                  Editing a comment
                  Do the seams need to be Parallel when resting , or is this only necessary at the time the valve closes ? What I'm getting at is , can the float seam be further into the carb. at rest ? I ask because , one Float sets Parallel at rest and seems to need more lift to open the valve . This makes me wonder if this would starve the carb. at WOT for extended time ? The other Float opens sooner but still closes at the parallel position . I know I think to much , Sorry .

                • davej
                  davej commented
                  Editing a comment
                  Duke, When we talked on the phone I knew you would like this method. I personally never checked it against the book method but I knew it worked so IMO there was no need to compare the 2.

              • #19
                Do the seams need to be Parallel when resting?

                Valve is shut at parallel. With the carb upside down, the further the float goes into the carb body, the higher the fuel level.

                Comment


                • Horsehammerr
                  Horsehammerr commented
                  Editing a comment
                  Did everything as close to all stated . Got it to start and let it get hot . Readjusted PMS and put air filter back on . Now will NOT start .

                • Horsehammerr
                  Horsehammerr commented
                  Editing a comment
                  OK , got it to restart . Still a complete pain to start . Acts like it's not getting gas to start , even with the enricher set at any position . Once running the enricher does affect idle .

              • #20
                How are you doing the throttle and/or choke?

                Comment

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