Power BAND

Collapse
X
 
  • Time
  • Show
Clear All
new posts
  • speedlimit85
    XStremely XSive
    • Jan 2017
    • 420
    • Gainesville, Fl.

    #1

    Power BAND

    It's a great feeling when the machine meshes and takes off. My current bike is a stock 1980 XS1100 G standard. I am not sure if I got it running so well it has a power ban or if my clutch is slipping.
    80 G
  • DiverRay
    Moderator
    • Nov 2004
    • 7602
    • Star, IDAHO

    #2
    If the RPM's seem to go up, but you don't seem to accelerate to match, it's the clutch. Get a set of Barnett springs and you should be good to go.
    Ray Matteis
    KE6NHG
    XS1100 E '78 (winter project)
    XS1100 SF Bob Jones worked on it!

    Comment

    • IanDMacDonald
      XS-XJ Super Guru
      • Oct 2010
      • 3917
      • Grand Blanc & Fenton, MI

      #3
      Yuppers. U'll get used to them.
      1979 XS1100F
      2H9 Mod, Truck-Lite LED Headlight, TECHNA-FIT S/S Brake Lines, Rear Air Shocks, TKAT Fork Brace, Dyna DC-I Coils, TC Fuse Block, Barnett HD Clutch Springs, Superbike Handlebars, V-Star 650 ACCT, NGK Irridium Plugs, OEM Exhaust. CNC-Cut 2nd Gear Dogs; Ported/Milled Head; Modded Airbox: 8x8 Wix Panel Filter; #137.5 Main Jet, Viper Yellow Paint, Michelin Pilot Activ F/R, Interstate AGM Battery, 14MM MC, Maier Fairing, Cree LED Fog Lights.

      Comment

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

        #4
        Hey Speed,

        The XS11 engine has strong low rpm torque, but yes, there is a power band that kicks in around 4K up to ~7.5K where folks describe the feeling like trying to pull your arms off, depending on which gear you're in when you hit and go thru it!

        But as has been stated, if you crank the throttle and the rpms rise, but you don't feel or see your speed incrementing the same, then your clutch may be slipping. Check your adjustment at the engine, as the clutch wears, the clearance reduces and can get too tight.

        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

        • speedlimit85
          XStremely XSive
          • Jan 2017
          • 420
          • Gainesville, Fl.

          #5
          Originally posted by TopCatGr58
          Hey Speed,

          The XS11 engine has strong low rpm torque, but yes, there is a power band that kicks in around 4K up to ~7.5K where folks describe the feeling like trying to pull your arms off, depending on which gear you're in when you hit and go thru it!

          But as has been stated, if you crank the throttle and the rpms rise, but you don't feel or see your speed incrementing the same, then your clutch may be slipping. Check your adjustment at the engine, as the clutch wears, the clearance reduces and can get too tight.

          T.C.
          Good description. Thank you.

          My clutch was slipping. I think it is working now (adjusted and cleaned cable). Tuned it up so well now, I had not experienced the power ban on this bike before.

          Also, last year, a Yamaha dealer pinched off the vacuum advance because it's broken. I just plugged a vacuum air leak.
          80 G

          Comment

          • motoman
            Master of XSology
            • Aug 2005
            • 8413
            • Grand Junction, Colorado

            #6
            Originally posted by speedlimit85
            Good description. Thank you.

            My clutch was slipping. I think it is working now (adjusted and cleaned cable). Tuned it up so well now, I had not experienced the power ban on this bike before.

            Also, last year, a Yamaha dealer pinched off the vacuum advance because it's broken. I just plugged a vacuum air leak.
            Correct clutch adj. is FIRST done at throw-out bearing assembly, which is under round cover on the clutch side of motor, with cable assembly and lever left loose. THEN adjust cable assembly.
            81H Venturer1100 "The Bentley" (on steroids) 97 Yamaha YZ250(age reducer) 92 Honda ST1100 "Twisty"(touring rocket) Age is relative to the number of seconds counted 'airing' out an 85ft. table-top.

            Comment

            • MaximPhil
              XS-XJ Super Guru
              • May 2004
              • 4119
              • Mississauga, ON CANADA

              #7
              Hi Speedlimit85,
              Welcome to the XS madness. While you are fine tuning your clutch adjustment Check under the cover for the pivot pin of the lever and give it a drop of light oil. May as well do the brake lever too while you have the 3in1 oil can out. Preventive maintenance is a wonderful thing.
              Phil
              1981 XS1100 H Venturer ( Addie)
              1983 XJ 650 Maxim
              2004 Kawasaki Concours. ( Black Bear)

              Comment

              • motoman
                Master of XSology
                • Aug 2005
                • 8413
                • Grand Junction, Colorado

                #8
                Originally posted by maximphil
                hi speedlimit85,
                welcome to the xs madness. While you are fine tuning your clutch adjustment check under the cover for the pivot pin of the lever and give it a drop of light oil. May as well do the brake lever too while you have the 3in1 oil can out. :d preventive maintenance is a wonderful thing.
                Phil
                +1!...........
                81H Venturer1100 "The Bentley" (on steroids) 97 Yamaha YZ250(age reducer) 92 Honda ST1100 "Twisty"(touring rocket) Age is relative to the number of seconds counted 'airing' out an 85ft. table-top.

                Comment

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

                  #9
                  Originally posted by speedlimit85
                  Good description. Thank you.

                  My clutch was slipping. I think it is working now (adjusted and cleaned cable). Tuned it up so well now, I had not experienced the power band on this bike before.

                  Also, last year, a Yamaha dealer pinched off the vacuum advance because it's broken. I just plugged a vacuum air leak.
                  Hey again Speed,

                  Glad you found the problem. BTW, the correct term is "BAND", have corrected the thread title and post. Enjoy!

                  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

                  • speedlimit85
                    XStremely XSive
                    • Jan 2017
                    • 420
                    • Gainesville, Fl.

                    #10
                    Originally posted by TopCatGr58
                    Hey again Speed,

                    Glad you found the problem. BTW, the correct term is "BAND", have corrected the thread title and post. Enjoy!

                    T.C.
                    Yea power band. My clutch is still slipping though. I will try to fine tune the adjustment again.
                    80 G

                    Comment

                    • Bonz
                      XS-XJ Super Guru
                      • Apr 2008
                      • 3206
                      • Palmer Lake, Colorado

                      #11
                      With respect, to say the XS has "strong low end torque" is a bit of a stretch, IMO. Back in 1980 relatively speaking, yes. Today, not even. Period tests were in agreement that it didn't have much below 3000 to 3500 rpm. I would concur. It is a 610 lb bike that isn't making 60 ft/lbs until after 5k rpm.

                      This link shows a thread with a dyno chart of the 78-79 and the 80 cammed bikes (post #36). For the 80's and above, 40 ft/lbs around 2k rpm isn't all that much, barely 55 ft/lbs at 3k rpm and dips down before getting back to 55 ft/lbs at 4K rpm and finally hits 60 ft/lbs at 5k rpm. Then is back down at/below 60 ft/lbs when 7k rpm shows up on the tach.

                      Howard

                      ZRX1200

                      BTW, ZRX carbs have the same spacing as the XS11... http://www.xs11.com/forum/showthread.php?t=35462

                      Comment

                      • DiverRay
                        Moderator
                        • Nov 2004
                        • 7602
                        • Star, IDAHO

                        #12
                        If it's slipping again, replace the springs!!! How old are the springs in the clutch? stock, they have been compressed for 36+ years. New Barnett springs are about $30 for a set, and take about 1.5 hours to install, if you are doing it for the first time. With these old bikes, they really do solve the problem most of the time.
                        Oh, and notice, I said Barnett! Some of the other springs just don't work, I've tried a few different brands...
                        Ray Matteis
                        KE6NHG
                        XS1100 E '78 (winter project)
                        XS1100 SF Bob Jones worked on it!

                        Comment

                        • bikerphil
                          Master of XSology
                          • Jan 2008
                          • 8631
                          • South Flori-DUH

                          #13
                          speedlimit85, If you have synthetic oil in the engine, you may get clutch slip. Most of us run dino.
                          2H7 (79) owned since '89
                          3H3 owned since '06

                          "If it ain't broke, modify it"

                          Comment

                          • speedlimit85
                            XStremely XSive
                            • Jan 2017
                            • 420
                            • Gainesville, Fl.

                            #14
                            Well thanks for the welcome and reply's. Back in the day I had a "79 XS1100 bored out to 1179 with an orient express kit. It had a power band!
                            80 G

                            Comment

                            • speedlimit85
                              XStremely XSive
                              • Jan 2017
                              • 420
                              • Gainesville, Fl.

                              #15
                              I do have synthetic oil. I re-adjusted the clutch as it says here in tech tips maintenance. I have said this before... I think I fixed it!

                              I took a ride and beat on it and no slip (so far).
                              80 G

                              Comment

                              Working...