Possible fuel line issue?

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  • shopteach
    XSive
    • Jan 2024
    • 12

    #46
    OK, I got an update. I bought and installed the Dynatek coils. I left the resistor unplugged/looped the two wires together. Still running the same. Tried to ride it around the block with choke on/off/mid still not good. Here is what it sounds like after it had run for a bit and me trying to ride it around the block. I also did the velocity stack to pod filter trick so that shouldn't be an issue anymore. Where should I go from here guys?

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    • cajun31
      Moderator
      • Oct 2003
      • 1821
      • Brandon, MS

      #47
      Originally posted by shopteach
      OK, I got an update. I bought and installed the Dynatek coils. I left the resistor unplugged/looped the two wires together. Still running the same. Tried to ride it around the block with choke on/off/mid still not good. Here is what it sounds like after it had run for a bit and me trying to ride it around the block. I also did the velocity stack to pod filter trick so that shouldn't be an issue anymore. Where should I go from here guys?
      https://youtu.be/_YQW4WclJRc?si=34se5LGhH8NtL_k5
      That sounds like a bike that needs to synched. From all you have said so far the carbs should be clean. Can't say much about the jets you have installed because I have no experience with them. I had a bike run just like yours after it had sat a while and it ended up being crud buildup from old gas. Removed the carbs and did a thorough clean of the jets and basically everything, put them back together and all was well. I also synched them and tuned them in with a color tune. What kind of gas are you using? Ethanol or non? Pete made a good suggestion about doing a bench synch of the carbs if you don't have gauges. That gets you very close but truly they need to be synched with gauges. They don't have to be very far off to run just like your bike sounds.
      2 - 80 LGs bought one new
      81 LH
      02 FXSTB Nighttrain
      22 FLTRK Road Glide Limited
      Jim

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      • Radioguylogs
        XS-XJ Guru
        • Nov 2012
        • 1988
        • Presque Isle, MI

        #48
        Seems like the A/F mixture is off whenever you try to rev it.

        Wonder if the vacuum pistons are operating properly.

        Maybe you could remove the air pods and look into the carb air inlets to see what the pistons are doing?

        Spark timing advance might another suspect.
        -Mike
        _________
        '79 XS1100SF 20k miles
        '80 XS1100SG 44k miles
        '81 XS1100H Venturer 35k miles
        '79 XS750SF 17k miles
        '85 Honda V65 Magna ~7k miles
        '84 Honda V65 Magna 48k miles (parts bike)
        '86 Yamaha VMAX 9k miles

        Previous: '68 Motoguzzi 600cc + '79 XS750SF 22k miles +'84 Honda V65

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        • oldyam80sg
          XS-XJ Guru
          • Apr 2007
          • 2057
          • Hackettstown , New Jersey

          #49
          I used the bread tie sync before I got a set of gauges. I use the Morgan Carbtune gauges as they are nice and compact.
          1980 XS1100 SG
          Inline fuel filters
          New wires in old coils-outer spark plugs
          160 mph speedometer mod
          Kerker Exhaust
          xschop K & N air filter setup
          Dynojet Recalibration kit
          1999 Kawasaki ZRX1100
          1997 Jeep Cherokee 4.5"lift installed

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