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82 650L #2 Cyl Inop (Can’t find answer)

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    82 650L #2 Cyl Inop (Can’t find answer)

    Hey yall, sorry to bother again, but I can’t seem to find the answer to my question thru the numerous pages of info. I went thru the #2 carb today for it being the only cylinder not firing (this cylinder has good spark and compression like the others). I thoroughly soaked all the passages I could get to and blew out with compressed air, as well as replacing the o-ring under the mixture screw hardwares. I could not get the idle jet or emulsifier jet out by ANY means; I’m getting to where I’m going to break something else on the carb before I ever fix this issue (why I tried just soaking the passages and blowing them out). Then after reassembly and Install, it’s doing same exact thing; ice cold exhaust header #2. Im afraid to ride it in this condition. I’ve tried my very best to study and adhere to the “common new mistakes” on here for hours trying to correct all those things. Any input or advice? TIA

    #2
    Is the spark plug getting wet?
    If it is, likely the petcock has failed and fuel is coming down the vacuum line and flooding #2
    Then, cap the vacuum line and run the bike on Prime to see if #2 will fire
    1978 GS 1000 (since new)
    1979 GS 1000 (The Fridge, superbike replica project)
    1978 GS 1000 (parts)
    1981 GS 850 (anyone want a project?)
    1981 GPZ 550 (backroad screamer)
    1970 450 Mk IIID (THUMP!)
    2007 DRz 400S
    1999 ATK 490ES
    1994 DR 350SES

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      #3
      Use a guitar string or similar through the pilot jet, to make sure the passage is open.
      Ed

      To measure is to know.

      Mikuni O-ring Kits For Sale...https://www.thegsresources.com/_foru...ts#post1703182

      Top Newbie Mistakes thread...http://www.thegsresources.com/_forum...d.php?t=171846

      Carb rebuild tutorial...https://gsarchive.bwringer.com/mtsac...d_Tutorial.pdf

      KZ750E Rebuild Thread...http://www.thegsresources.com/_forum...0-Resurrection

      Comment


        #4
        When my petcock failed and flooded the #2 cylinder like Big T is stating, it still fired. It just smelled like gas all the time and quickly fouled out the plug. I would clean the plug and it would run great for a little while until it fouled again.

        I'd be inclined to believe the pilot jet is clogged. Or maybe there's no fuel in the #2 bowl? But I'd check the plug for sure since that's allot easier than taking the rack down and attempting to extract the pilot. But that still must be done.

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