4 in to 1's

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  • 81XS1100-2006
    Truly XSive
    • Feb 2006
    • 105
    • Minneapolis, MN

    #1

    4 in to 1's

    Looking at putting 4-1 pipes on my 81 standard. Anyone know if I need to tune my carbs differently from standard pipes, and if so approx settings?
    81 Standard "Babe the Blue"
    sticky side down!
  • DiverRay
    Moderator
    • Nov 2004
    • 7605
    • Star, IDAHO

    #2
    Depends on what else has been done with the engine. Normally, one size on the main will do it, but if you've drilled the stock air box, or have pod filters, you may need two or three sizes up.
    Ray
    Ray Matteis
    KE6NHG
    XS1100 E '78 (winter project)
    XS1100 SF Bob Jones worked on it!

    Comment

    • 81XS1100-2006
      Truly XSive
      • Feb 2006
      • 105
      • Minneapolis, MN

      #3
      so far everything's stock with the engine/airbox/carbs. So one size up on the main jets?
      81 Standard "Babe the Blue"
      sticky side down!

      Comment

      • TopCatGr58
        Administrator
        • Jul 2002
        • 12650
        • Portsmouth, Va.

        #4
        Years ago in my Ignorant Youth,

        I put on 4-1 pipes shortly after I got my bike back from Japan where I was stationed, and I didn't rejet it at all. Drove the equivalent of an IRON BUTT ride from Va. down to Ft. Benning, Ga. and then back, no burned pistons, and had plenty of power up to redline. But I'm sure it was a bit lean!

        DiverRay knows his stuff, would be well advised to follow his recommendation!
        T.C.

        PS, DiverRay, YES,you are only about 30 some odd posts from "GURU" status!!
        T. C. Gresham
        81SH "Godzilla" . . .1179cc super-rat.
        79SF "The Teacher" . . .basket case!
        History shows again and again,
        How nature points out the folly of men!

        Comment

        • DiverRay
          Moderator
          • Nov 2004
          • 7605
          • Star, IDAHO

          #5
          So this is when I start loading the system? a new post for every line until I get there? AND< I'll have to post an avitar, to show I know what I'm doing!!
          Ray
          Ray Matteis
          KE6NHG
          XS1100 E '78 (winter project)
          XS1100 SF Bob Jones worked on it!

          Comment

          • sxigh
            XSive
            • Jun 2006
            • 27

            #6
            I've got a kerker 4-1 w/ a k&n airbox, went up 2 on the mains, runs pretty good (cept for the fouled plug on #1, separate issue btw, read the thread at http://www.xs11.com/forum/showthread...threadid=10316 , comments very welcome!!)

            the consensus relating to jet sizes around here seems to be located at http://www.xs11.com/forum/showthrea...s=&threadid=382
            '78 xs1100e (red monster)
            '72 xs650 (big red)

            Comment

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