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  • #31
    Progress is always a good thing, your moving forward!!

    As to the spark issue, remember this system sparks through both wires of the coil at the same time. If you remove one plug wire and do not reground it, it kills both cylinders that coil feeds. I once pulled the no 1 plug wire and pulled the plug to check something and forgot to put the wire back on after I put the plug back in. I then took the bike for a ride like that. Talk about acting screwy, that wire would swing in the air and periodically ground out letting the other plug fire, then come off the engine and kill both.
    Last edited by DGXSER; 05-19-2010, 07:30 PM.
    Life is what happens while your planning everything else!

    When your work speaks for itself, don't interrupt.

    81 XS1100 Special - Humpty Dumpty
    80 XS1100 Special - Project Resurrection


    Previously owned
    93 GSX600F
    80 XS1100 Special - Ruby
    81 XS1100 Special
    81 CB750 C
    80 CB750 C
    78 XS750

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    • #32
      Finally

      Its been a while since I have given an update on my PITA 79 special. I got alot done recently.
      Start with accel issues: I got brave and per advice from TheWiz I decided to richen my needles a notch. Wow what a difference. Accel off the line with no problem all the way up to 7k where my tach quits working. That is normal that it doesn't go all the way up and not an issue to me. So that was great... but then I started to foul my plugs and my riding buddy told me it smelled like a gas station riding behind me. So I tried to lean it out via idle mixture screws, that got it closer and reduced the amount of black smoke and gas smell, but it was still there.
      Fast forward to last weekend (October 8th) decided to take a trip with it up to the Appalachian Homecoming game. Ran OK up till the mountain, and then it craped out. So I took it to TheWiz in Wilkes. He had a busy week so I took a half day on this past Friday. The first thing we tried was removing the air filter from the air box. Wow what a difference. So that showed us we needed to drill the box. We drilled the 3 1.25 in holes in the bottom and took all the floats to the middle of the range and adjusted the drops. Also found a hole in my diaphragm on no 4. That probably happened when I adjusted the needles. We patched that and got it reassembled. I rode it home to Charlotte, about 80 miles and wow, this bike is great. If it wasn't for TheWiz this bike would be in the parts for sale section.
      Extreme richness went away. My wife said she did not need the air recirculation in the car and no black smoke. All the way to somewhere above 7k with no issue and roll on at high speed is perfect. I will be working a little more on the carbs this coming weekend, replacing the diaphragm (donor set), checking the plug, adjusting as needed, Syncing, colortuning, and re-syncing. Once again a huge thanks to these forums and TheWiz.
      1979 XS 1100SF Serenity
      1981 XJ650 Midnight - Black Betty
      Road Dog 4 Life

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      • #33
        Originally posted by Rettic View Post
        snip. So I tried to lean it out via idle mixture screws, that got it closer and reduced the amount of black smoke and gas smell, but it was still there.
        snip
        Well, you cant argue with success, but usually the idle mixture screws dont affect richness above midrange rpms. When you adjust them for higher throttle, you usually screw-up the low rpm range and midrange.
        Skids (Sid Hansen)

        Down to one 1978 E. Stock air box with K&N filter, 81H pipes and carbs, 8500 feet elevation.

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