Announcement

Collapse
No announcement yet.

Air coming out of carburetor

Collapse
X
 
  • Filter
  • Time
  • Show
Clear All
new posts

  • Air coming out of carburetor

    Just bought an 07 roadstar. It wouldn't start so I took the carb apart cleaned reassembled try starting and noticed fuel coming out of carb I also noticed air blowing out of it. I got it to run but only with the air box on but its dripping fuel out of air box. I thought it was a float setting or needle. But I replaced needle and checked float. Air blowing out has me concerned

  • #2
    Did you use factory parts ornaftermarket parts? Where was the fuel coming from?

    These bikes need restriction (air filter) to run half way decent. Is carb jetted? What modifications do you have done to bike?
    LET'S RIDE

    Comment


    • #3
      The carb is jetted with Barron parts, no mods except exhaust. Fuel was blowing out of the carb horn almost like an exaust valve stuck and it's blowing back threw carb

      Comment


      • #4
        Should check float level and make sure float isn't stuck. It would be a good time to pull the main jet the pilot jet and check exactly the numbers on there as well as pull the needle and see if the clip position is correct. However if all you have done is exhaust you really don't need a jetting change.
        LET'S RIDE

        Comment


        • #5
          It also has a big air kit, I checked everything in the carb twice.


          ​​​

          Comment


          • #6
            Should air be blowing out of carb at all?

            Comment


            • #7
              Take the bowl off and make sure that the floats actually stop the fuel ,gently, manually. There is an oring behind the base of the needle and seat that can fail or be forgotten. Float level should be set to 4-5 mm above the seam of the bowl and the left rear hand side of the carburetor carburetor on level bike. Hopefully not much of that gas got in your oil.

              Comment


              • #8
                Originally posted by Steelfab1 View Post
                It also has a big air kit, I checked everything in the carb twice.


                ​​​
                What were the jet sizes exactly? The instructions with the Barons jet kit is not ideal for Road Star...

                But the fuel seeping would be due to float bowl not moving freely, or as mentioned the needle/seat not operating correctly. Of course the bowlngasket should be carefully Inspected also and make sure bowl is not cracked around drain
                LET'S RIDE

                Comment


                • #9
                  I appreciate the info guys but I've checked all of these things twice, my question is should compression be coming out of the carb

                  Comment


                  • #10
                    The bike was jetted in 2010 and ran fine after but it sat up for some time

                    Comment


                    • #11
                      Originally posted by Steelfab1 View Post
                      I appreciate the info guys but I've checked all of these things twice, my question is should compression be coming out of the carb
                      No, air should get sucked in not pushed out.

                      Comment


                      • #12
                        Might be worth doing a compression check and see where things sit.

                        Comment


                        • #13
                          I'm guessing an intake valve is stuck open, I will try and take a look at it this afternoon I'll let y'all know how it goes

                          Comment


                          • MikeyC
                            MikeyC commented
                            Editing a comment
                            That would be my guess.

                        • #14
                          is the decompressor working/sticking? i would try a compression check next

                          Comment


                          • Brad_G
                            Brad_G commented
                            Editing a comment
                            Good though on the decompression system. I always forget about that.

                        • #15
                          Originally posted by Steelfab1 View Post
                          I'm guessing an intake valve is stuck open, I will try and take a look at it this afternoon I'll let y'all know how it goes
                          Could try the SVS (STUCKY VALVE SYMDROME) cure...see if that helps. While bike isnrunning to check for a sticky valve you can put a dollar bill at end if exhaust...if it sometimes gets sucked into pipe it can indicate a sticky valve
                          LET'S RIDE

                          Comment


                          • #16
                            Originally posted by Lug Nut View Post

                            Could try the SVS (STUCKY VALVE SYMDROME) cure...see if that helps. While bike isnrunning to check for a sticky valve you can put a dollar bill at end if exhaust...if it sometimes gets sucked into pipe it can indicate a sticky valve
                            Or it means the IRS is after you!

                            Comment


                            • #17
                              If its a "cough" through the carb while air filter is on then maybe intake manifold leak
                              LET'S RIDE

                              Comment


                              • #18
                                If you've checked the valves for sticking and everything is working right, make sure that you have no blockage in the exhaust.

                                Comment


                                • #19
                                  Simple test…. Pull 1 spark plug from rear jug…. Engage starter…. Did air puff out of carb stop happening?
                                  if not pull 1 spark plug from front jug…. Engage starter… did air puff out of carb stop….
                                  whichever cylinder spark plug removal stopped the air puff traced your problem to that cylinder….
                                  then it becomes your choice on next step…. I found that removing the rocker cover on the affected cylinder was the quickest way to isolate the problem to sticky valve, collapsed lifter, or something else… it takes about 5 mins to remove a rocker cover…

                                  Comment


                                  • #20
                                    I removed the spark plugs and check the compression with my finger the rear cylinder definitely losing compression somewhere going to open up the valve cover today and see what I find. Thanks for the input guys

                                    Comment

                                    Latest Posts

                                    Collapse

                                    Topics Statistics Last Post
                                    Started by EnergyGuy, 2 days ago
                                    2 responses
                                    90 views
                                    1 like
                                    Last Post Jclevesque  
                                    Started by Ironman, 1 day ago
                                    1 response
                                    83 views
                                    1 like
                                    Last Post Chooch
                                    by Chooch
                                     
                                    Started by Sooner1, 1 day ago
                                    5 responses
                                    90 views
                                    0 likes
                                    Last Post Lug Nut
                                    by Lug Nut
                                     
                                    Started by roadiemort, 2 weeks ago
                                    45 responses
                                    406 views
                                    0 likes
                                    Last Post LDofDC
                                    by LDofDC
                                     
                                    Started by MikeyC, 09-02-2021, 05:20 PM
                                    35 responses
                                    433 views
                                    0 likes
                                    Last Post Shores
                                    by Shores
                                     
                                    Started by Sooner1, 6 days ago
                                    10 responses
                                    91 views
                                    1 like
                                    Last Post YZ18
                                    by YZ18
                                     
                                    Started by Sasquatch, 1 day ago
                                    3 responses
                                    61 views
                                    0 likes
                                    Last Post Sasquatch  
                                    Started by Ciccone1234, 04-22-2021, 07:34 PM
                                    53 responses
                                    639 views
                                    0 likes
                                    Last Post Brad_G
                                    by Brad_G
                                     
                                    Started by TheDaveySprocket, 08-11-2021, 07:22 AM
                                    41 responses
                                    741 views
                                    3 likes
                                    Last Post TheDaveySprocket  
                                    Started by acczar, 1 week ago
                                    11 responses
                                    85 views
                                    1 like
                                    Last Post EP Roadie  
                                    Started by boomerA, 03-11-2021, 02:54 PM
                                    17 responses
                                    364 views
                                    0 likes
                                    Last Post SaxemaraBiker  
                                    Started by CanadaboyA, 1 week ago
                                    13 responses
                                    172 views
                                    0 likes
                                    Last Post brianmac  
                                    Started by Darkkill57, 5 days ago
                                    7 responses
                                    94 views
                                    0 likes
                                    Last Post EnergyGuy  
                                    Started by LordOfTheBuzzards, 5 days ago
                                    8 responses
                                    126 views
                                    0 likes
                                    Last Post LordOfTheBuzzards  
                                    Started by AllStarRdr, 3 days ago
                                    11 responses
                                    103 views
                                    0 likes
                                    Last Post Brad_G
                                    by Brad_G
                                     
                                    Started by CanadaboyA, 3 days ago
                                    1 response
                                    45 views
                                    0 likes
                                    Last Post Lug Nut
                                    by Lug Nut
                                     
                                    Started by Doc_V, 09-30-2018, 05:40 PM
                                    24 responses
                                    678 views
                                    0 likes
                                    Last Post HotRod
                                    by HotRod
                                     
                                    Started by Sharpman66, 4 days ago
                                    6 responses
                                    81 views
                                    0 likes
                                    Last Post Father Pobasturd  
                                    Started by Sharpman66, 4 days ago
                                    1 response
                                    43 views
                                    0 likes
                                    Last Post Boots
                                    by Boots
                                     
                                    Started by jluisochoa, 09-27-2019, 01:39 PM
                                    58 responses
                                    1,057 views
                                    0 likes
                                    Last Post Steelfab1  
                                    Working...
                                    X