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xs1100sf can't find the right brk master cyl kit

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  • #1

    xs1100sf can't find the right brk master cyl kit

    Ordered a master cyl kit for my 79 xs1100sf. I got a k&l 32-1085. Looks identical to the parts I need but everything seems to be for a slightly larger bore than what I have. The new push rod is too big for the bore. Everywhere I look this is the number listed for my bike. I'm not the original owner of the bike so idk if the master is the correct one. When I Google it, It looks correct. Only markings on the master housing is "nissin 4" which helps me none. Do I have an incorrect master for this bike or incorrect kit??? Please help before I waste anymore money!!
    79 XS eleven special
    Tags: None
  • #2
    Both the 1979's I own have Nissan 11/16 in raised letters on the bottom, haven't seen one with just a 4 yet.
    Now this was the front master, are you talking about the rear?
    Last edited by Sobitthen; 06-04-2014, 06:14 PM. Reason: typo
    1979 XS1100 w/Factory Fairing <Need left cover>
    1979 XS750 Special <Sold Spring 15>
    1977 XS750
    1978 IT250
    1987 YFM350

    Comment

    • #3
      I looked up K&L 32-185. The description is XS850 and XS1100.

      I have two SG's, but I can't read the markings on them where they're parked right now. All I can see near the reservoir is 1/2 in a circle. I can't see Nissin, even with a mirror.

      Like this one.
      Marty (in Mississippi)
      XS1100SG
      XS650SK
      XS650SH
      XS650G
      XS6502F
      XS650E

      Comment

      • #4
        Here is an eBay listing that looks like what you describe. If there's a difference....
        79 Yamaha XS1100 rear back brake master cylinder


        Marty (in Mississippi)
        XS1100SG
        XS650SK
        XS650SH
        XS650G
        XS6502F
        XS650E

        Comment

        • #5
          The 1/2 and the 11/16 is likely the bore of the cylinder, or one could easily assume so...
          So he was talking about the rear and you got that by looking up the kit number he mentioned, assuming again...
          1979 XS1100 w/Factory Fairing <Need left cover>
          1979 XS750 Special <Sold Spring 15>
          1977 XS750
          1978 IT250
          1987 YFM350

          Comment

          • #6
            I looked up the kit. K&L 32-1085 It shows up as a rear master cyl kit for XS850 and XS1100. My two XS1100SG's have 1/2 embossed on them like my first photo. Beyond this, I have no knowledge of what these bikes came equipped with for rear brake master cylinders. The parts fiche shows only one part number for the XS1100SF master cylinder assembly. 2H7-25850-51-00 shows effective for all XS1100's except for the LH.
            Last edited by jetmechmarty; 06-04-2014, 09:13 PM.
            Marty (in Mississippi)
            XS1100SG
            XS650SK
            XS650SH
            XS650G
            XS6502F
            XS650E

            Comment

            • #7
              The LH and LG were different but all the others, front and rear, are the same for the XS1100.
              Greg

              Everybody is a genius. But if you judge a fish by its ability to climb a tree, it will live its whole life believing that it is stupid.”

              ― Albert Einstein

              80 SG Ol' Okie;79 engine & carbs w/pods, 45 pilots, 140 mains, Custom Mac 4 into 2 exhaust, ACCT,XS850 final drive,110/90/19 front tire,TKat fork brace, XS750 140 MPH speedometer, Vetter IV fairing, aftermarket hard bags and trunk, LG high back seat, XJ rear shocks.

              The list changes.

              Comment

              • #8
                Correct me if I'm wrong, but I thought I remember reading somebody's post stating that Yamaha used two different rear masters with two different bores on a certain Special model. And, if this is the case, you just might be one of the unlucky ones that has the odd-bored rear master cylinder.
                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

                • #9
                  http://www.xs11.com/forum/showthread...+cylinder+bore
                  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

                  • #10
                    It appears you either need a kit for a 14mm master, or acquire a 1/2" master cyl. The 1/2 unit will take slightly less effort and have more gradual application if you go that route.

                    To acquire a kit for your master cylinder, I suggest you call Michael "Mercury" Morse at Vintage Brake.
                    Marty (in Mississippi)
                    XS1100SG
                    XS650SK
                    XS650SH
                    XS650G
                    XS6502F
                    XS650E

                    Comment

                    • #11
                      Originally posted by jetmechmarty View Post
                      Here is an eBay listing that looks like what you describe. If there's a difference....
                      79 Yamaha XS1100 rear back brake master cylinder
                      That's a 14mm bore master just like the ones I have. The 'standard' kit doesn't fit....
                      Fast, Cheap, Reliable... Pick any two

                      '78E original owner - resto project
                      '78E ???? owner - Modder project FJ forks, 4-piston calipers F/R, 160/80-16 rear tire
                      '82 XJ rebuild project
                      '80SG restified, red SOLD
                      '79F parts...
                      '81H more parts...

                      Other current bikes:
                      '93 XL1200 Anniversary Sportster 85RWHP
                      '86 XL883/1200 Chopper
                      '82 XL1000 w/1450cc Buell, Baker 6-speed, in-progress project
                      Cage: '13 Mustang GT/CS with a few 'custom' touches
                      Yep, can't leave nuthin' alone...

                      Comment

                      • #12
                        Actually its the front master I'm attempting to rebuild. The listing for this was for a front master. But its not right. If this is for a rear master that could be my issue and the guy on eBay listed it wrong. Theres no other numbers I can see besides a 1 in a circle and nissin 4. I'll get a pic of it tomorrow
                        79 XS eleven special

                        Comment

                        • #13
                          You must have gotten one for a MNS because they all the same except the MNS. Unless, someone put an midnight MC on your SF.

                          http://www.ebay.com/sch/i.html?_trks...at=0&_from=R40
                          Greg

                          Everybody is a genius. But if you judge a fish by its ability to climb a tree, it will live its whole life believing that it is stupid.”

                          ― Albert Einstein

                          80 SG Ol' Okie;79 engine & carbs w/pods, 45 pilots, 140 mains, Custom Mac 4 into 2 exhaust, ACCT,XS850 final drive,110/90/19 front tire,TKat fork brace, XS750 140 MPH speedometer, Vetter IV fairing, aftermarket hard bags and trunk, LG high back seat, XJ rear shocks.

                          The list changes.

                          Comment

                          • #14
                            [QUOTE=BA80;441950]You must have gotten one for a MNS because they all the same except the MNS. Unless, someone put an midnight MC on your SF.

                            According to the Vin it's an sf. The bike came from a family friend who had the bike since new and said he doesn't ever remember replacing it. So its possible bit not likely the wrong one. But if this kit is for a rear then that makes sense it looks identical to the parts I removed only for a slightly larger bore than what I have.
                            79 XS eleven special

                            Comment

                            • #15
                              If it's the correct kit for an SF it should be 11/16 or 17mm.
                              Greg

                              Everybody is a genius. But if you judge a fish by its ability to climb a tree, it will live its whole life believing that it is stupid.”

                              ― Albert Einstein

                              80 SG Ol' Okie;79 engine & carbs w/pods, 45 pilots, 140 mains, Custom Mac 4 into 2 exhaust, ACCT,XS850 final drive,110/90/19 front tire,TKat fork brace, XS750 140 MPH speedometer, Vetter IV fairing, aftermarket hard bags and trunk, LG high back seat, XJ rear shocks.

                              The list changes.

                              Comment

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