cant get xj1100 to 850k rpm

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  • posthuman
    XSive
    • Aug 2006
    • 71
    #1

    cant get xj1100 to 850k rpm

    stock XJ 13000 miles
    I can't even get it to 850k rpm

    just looses too much power, chokes to death or something, maybe leans out too much.. dunno

    example: third gear on freeway WOT, gets up to about 75+- mph and 800 +- rpm and goes no faster or rev higher

    I have read everything about performance on this sight I think
    I'll be slowly improving this machine with kerkers, airbox drillin' etc.
    XJ 1100
    XJ 550
    Tags: None
    • strom
      XS-XJ Guru
      • Jul 2002
      • 1577
      • Slovenia, EU
      #2
      Adjust your cam chain tensioner.
      And sort your RPMs... 850k... even jets dont do that.
      8.5k, 8500, ....something.
      The engine should pull stock well into the redline.
      Unless you broke or bent a valve or something. Check compression, sync the carbs, adjust ignition timing,...

      LP
      If it doesn't have an engine, it's not a sport, it's only a game.
      (stole that one from I-dont-know-who)

        Comment

        • TopCatGr58
          Administrator
          • Jul 2002
          • 12650
          • Portsmouth, Va.
          #3
          Hey Strom,

          Take it easy on the guy, he just got his bike back from being STOLEN! The "Theft", may have overrevved it and possibly bent a valve or two?? Have you done a compression test since you got it back? The XJ's TCI does not have a rev limiter, so it should run well past 8.5 K rpm! Check your vacuum lines, especially going to the little vacuum sensor under the tank!

          Switch the petcocks to PRIME, and try it to see if it still fades. If NOT, then it's a fuel supply problem, the Octy may not be functioning properly, again, the vacuum hoses going to it!
          Good Luck!
          T.C.
          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

            • lsippell
              XStremely XSive
              • Sep 2003
              • 216
              • Mayflower, Arkansas
              #4
              I wish my XJ would turn 850,000 rpm!

              Louis
              "There is no mechanical problem so difficult that it cannot be overcome by
              brute strength and ignorance" And possibly some Mouse Milk!
              '82 XJ1100J
              LED Dir and running lights
              LED Tail/Brake lights (4) one flashing
              Modulated H/L
              PIAA Driving lights
              YICS Eliminated
              750 FD

              Yamaha Factory X-1 Fairing and Luggage

                Comment

                • trbig
                  Simply used to just post A LOT!
                  • Nov 2005
                  • 7838
                  • Ada, Oklahoma
                  #5
                  I wish my XJ would turn 850,000 rpm!
                  I don't believe I wanna be sitting on ANYTHING spinning that fast!

                  Post... when's the last time you checked/cleaned/changed your air filter? Mine would do the same thing with those PNM air filters... it just couldn't breath at those higher rpm's. Just another suggestion.

                  Tod
                  Try your hardest to be the kind of person your dog thinks you are.

                  You can live to be 100, as long as you give up everything that would make you want to live to be 100!

                  Current bikes:
                  '06 Suzuki DR650
                  *'82 XJ1100 with the 1179 kit. "Mad Maxim"
                  '82 XJ1100 Completely stock fixer-upper
                  '82 XJ1100 Bagger fixer-upper
                  '82 XJ1100 Motor/frame and lots of boxes of parts
                  '82 XJ1100 Parts bike
                  '81 XS1100 Special
                  '81 YZ250
                  '80 XS850 Special
                  '80 XR100
                  *Crashed/Totalled, still own

                    Comment

                    • posthuman
                      XSive
                      • Aug 2006
                      • 71
                      #6
                      thanks , good suggestion s all

                      glad I could provide entertainment with a typo as well

                      has a stock yamaha airbox filter
                      XJ 1100
                      XJ 550

                        Comment

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