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  • Carb puke?

    I’m hoping someone here can help me. I have a 2003 California rs. After removing the ais along with the charcoal canister and it’s hoses I’m getting fuel coming out of the surge tank, #39, after I ride. It drips out slowly after about 10 min from shut down. I’ve concluded that this is coming from hose #41 as hose #43 is disconnected. Is this carb puke? There is also a very slight drip from the roll over valve hose. The gas coming from the surge tank happens every ride, cold or hot. I’ve read every post I can find on this subject and am wondering if going pumpless will cure this or if I just have a float issue. The previous owner probably didn’t know about this because the fuel coming out of the surge tank went into the charcoal canister. Turning the peacock of before I shut down doesn’t help. Thanks in advance for any help

  • #2

    Comment


    • #3
      No, carb puke is when fuel expands in the carb bowel and pushes out past the needle valve and/or over flow port. DH what a surge tank is. I don’t have one on my 2008. Sounds like you didn’t remove the AIS correctly.

      Comment


      • #4
        Well not knowing what is causing this I ordered the carb repair kit. I’ve never worked on a carb but hopefully this will work

        Comment


        • #5
          Sounds like Carb Puke. It can come from here. [see photo below]. Normally there's a bent hose attached, Maybe #41 in the diagram.

          BTW - How soon do you turn the petcock off before you turn off the engine off? It needs to be done about a half a block away, or wait several mins before you turn the motor off. And not to be obvious, but you're aware off is horizontal, up is main and down is reserve? [or the other way around, I always forget which is which]

          Click image for larger version  Name:	image_1105.jpg Views:	5 Size:	58.8 KB ID:	58453
          Last edited by Doc_V; 02-13-2019, 01:02 AM.

          Comment


          • Duke
            Duke commented
            Editing a comment
            Hey Doc, think of the knob as a pointer, small end is the point.

          • Jclevesque
            Jclevesque commented
            Editing a comment
            There is where mine puked from. Hosed it down below the frame. Also took out the rollover valve and it was plugged. Got it going again with a shot of compressed air but didnt put back in. I cut a piece of tubing from the oem fuel line and spliced both hoses together with some hose clamps. Havent tried yet but hopefully cured the puking.

          • Coach
            Coach commented
            Editing a comment
            Thanks Doc. Yes that line goes to the surge tank. Thank you. I’ve just noticed my air filter is soaked with fuel and found this diaphram looks to have a crack. I turn fuel off fuel at the correct time at about half a block

        • #6
          --

          Main fuel flow is down.

          --

          Comment


          • Coach
            Coach commented
            Editing a comment
            Thanks Ron, what does that mean? What would be the remedy? I’ve put a new fuel filter on

        • #7
          What RonK said...

          Comment


          • #8
            Install some tubing where Doc is pointing to and run it down under the bike so if you get puking it will run on the ground below and not your bike. I'm getting ready to re-jet my carb. When I do I bought some aerospace heat wrap for $15.00 and I'm going to wrap my fuel line with it. Maybe that will stop the fuel from getting hot in the line?

            http://www.extremeheatprotection.com...lass-tape.html

            Comment


            • #9
              Do you really need the carb heater when you only ride above 50 degrees? How much heat does it actually put out?

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              • #10
                Originally posted by NCB View Post
                Do you really need the carb heater when you only ride above 50 degrees? How much heat does it actually put out?
                YES! Enough to prevent icing.

                Comment


                • #11

                  Comment


                  • Duke
                    Duke commented
                    Editing a comment
                    Cracked enriching valve cover. Cheep plastic!

                • #12
                  Where is that black tubing at the top routed to? That is the one that should be routed to the underside of the bike to drain to the ground if you get puking.

                  Comment


                  • #13
                    Hey NCB, that hose goes to the surge tank located behind the fuel pump on a California bike.

                    Comment


                    • #14
                      If you've removed your AIS, just run it under the bike pointing at the ground. The only thing you should have running to the back of the air cleaner is the crank case breather, and that just blows oil. If that's all you have connected and you're getting fuel in there, then you likely have a bigger issue of blow by on your pistons. That's easy enough to check, just pull your dipstick and smell. If it smells like strong gasoline, you have problems.

                      Comment


                      • Coach
                        Coach commented
                        Editing a comment
                        Thanks Doc. No smell of fuel in the oil. The crank case breather looks to run to the surge tank as well. The amount of fuel coming out of the hose is obviously not right. Once the kit gets here I’ll check the float level

                    • #15
                      Must of us have also moved the crank vent that went to the air box and vented it to a smaller filter. This elemenates the blow by going into the carb. See pic below

                      Comment


                      • Coach
                        Coach commented
                        Editing a comment
                        Thanks N. I’ll do that

                      • Doc_V
                        Doc_V commented
                        Editing a comment
                        it's a good mod and you can locate the breather filter just about anywhere. Some have it where NCB does, others near the rear horn, some under the air cleaner and others hidden under the gas tank. That last one requires a different and cheaper filter. Post a question if you want to know more.

                    • #16
                      Originally posted by NCB View Post
                      Must of us have also moved the crank vent that went to the air box and vented it to a smaller filter. This elemenates the blow by going into the carb. See pic below
                      --

                      Another option on the venting of the crank vent is a hose up under the gas tank with a breather filter at the end.

                      --

                      Comment


                      • Coach
                        Coach commented
                        Editing a comment
                        Thanks Ron. I’ve seen this done. Once I cure this carb puking issue I’ll visit the vent,
                        Thanks again

                    • #17
                      In this pic you can see my crank vent under the air filter.


                      Comment


                      • Coach
                        Coach commented
                        Editing a comment
                        Thanks FP, that is a really nice set up with both filters matching, nicely done

                      • Brad_G
                        Brad_G commented
                        Editing a comment
                        I agree Coach, it just looks like it belongs there. Symmetrical with the engine.

                    • #18
                      You might want to check your fuel level in Carb. When I bought my bike, I had the carb puking gas all the time, I checked the fuel level in the Carb and it was out of spec( Too High), I adjusted the float and rechecked that the fuel level was to spec and no more carb puke.................
                      I March on the Road of Bones

                      Comment


                      • Chief_10Beers
                        Chief_10Beers commented
                        Editing a comment
                        No, Right side up, carb on the Bike and level with fuel pump on, you're going to need a long 5mm hex to crack the fuel drain on the carb with a clear hose ( aquarium type hose) attached to the brass tube at the bottom of the Carb, Take measurement at the Air filter side of the carburetor. Make sure that hose is up. I gained access to the Fuel drain bolt from the left side of the Bike with a 3/8drive Long 5mm hex with a 3/8 6" extension. Do not start the engine. Fuel measurement reference points is on pg 250 in the clymer manual or 6-14 in the Factory service manual, should be 4-5mm( 0.16-0.20in). The upper limit is the mating surface of the float bowl and carb and the lower is the bottom surface of the flange on the float bowl to the mating surface seam. Same for both 1600 and 1700 Bikes.

                      • Coach
                        Coach commented
                        Editing a comment
                        Thanks Chief, excellent information! I’ll be checking the float level with the carb off as I’ll be doing the needle and seat.

                      • Chief_10Beers
                        Chief_10Beers commented
                        Editing a comment
                        As soon as you re-assemble the carburetor, you need to install the carb back on the Bike and you need to run the fuel pump to properly check the fuel level in the carb( that is if you're not pumpless).

                    • #19
                      Originally posted by Father Pobasturd View Post
                      In this pic you can see my crank vent under the air filter.


                      Do you have any blow by oil on the Engine? I routed the crank case vent hose under the fuel tank using the PCV Filter and filter holder...................
                      I March on the Road of Bones

                      Comment


                      • Father Pobasturd
                        Father Pobasturd commented
                        Editing a comment
                        I suppose eventually enough may build up and I will have to take it off and wash it but it has 8K on it now and is still clean. I don't ride really aggressive.

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