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  • #1

    Rear Brake Pad Part Number

    Hello,

    I need to replace my rear brake pads, and I'm having trouble identifying a part number, so I can order them or call around. I'm sure you all know this off the top of your heads...
    1979 Yamaha XS1100 Special
    1969 (or '70 or '71) Triumph (Trophy or BSA) 250
    Tags: None
  • #2
    Originally posted by Mendizale View Post
    Hello,

    I need to replace my rear brake pads, and I'm having trouble identifying a part number, so I can order them or call around. I'm sure you all know this off the top of your heads...
    You don't need a part number. Just go on eBay and search for XS1100 brake pads. There are loads of people selling them. Just specify that they are for your model of bike.....
    XS1100F 1980 European model. Standard. Dyna coils. Iridium plugs. XS750 final drive (sometimes). Micron fork brace. Progressive front springs. Geezer regulator/rectifier. Stainless 4 into 2 exhaust. Auto CCT (Venturer 1300) SOLD. New project now on the go. 1980 European model.

    Comment

    • #3
      Do all of the XS models share the same rear pads?
      1979 Yamaha XS1100 Special
      1969 (or '70 or '71) Triumph (Trophy or BSA) 250

      Comment

      • #4
        No, they don't. I believe the Specials calipers are different. When I replaced all mine, I took a set off and just looked on eBay for the same design. That's when I noticed that my 1979 standard differed from others and that there seem to be two different types. This topic has been discussed recently, so I'm sure later on there'll be others posting more exact details.
        XS1100F 1980 European model. Standard. Dyna coils. Iridium plugs. XS750 final drive (sometimes). Micron fork brace. Progressive front springs. Geezer regulator/rectifier. Stainless 4 into 2 exhaust. Auto CCT (Venturer 1300) SOLD. New project now on the go. 1980 European model.

        Comment

        • #5
          http://cgi.ebay.co.uk/Yamaha-XS1100-...item2eb5d6e266

          Here's one type. These do NOT fit my 1979 F
          XS1100F 1980 European model. Standard. Dyna coils. Iridium plugs. XS750 final drive (sometimes). Micron fork brace. Progressive front springs. Geezer regulator/rectifier. Stainless 4 into 2 exhaust. Auto CCT (Venturer 1300) SOLD. New project now on the go. 1980 European model.

          Comment

          • #6
            Break Pad Wear

            The reason I'm looking into new pads is that the rear brake has taken on a slight grating sensation as I apply it, and stopping power has decreased noticeably. I'm assuming worn out pads, but I haven't been able to "see" that I need new ones, because the indicator cap on the rear caliper seems impossible to look into (I can't see much of anything, let alone a red line). I'm going to grab a headlight and the viewing tube from the Colortune to see if that helps, but any tips would be appreciated.
            1979 Yamaha XS1100 Special
            1969 (or '70 or '71) Triumph (Trophy or BSA) 250

            Comment

            • #7
              The rear pads of the US XS1100s are all the same, maybe the 81 mns is different though. The standard fronts are also the same as all the others rears.

              http://cgi.ebay.com/ebaymotors/YAMAH...s#ht_558wt_939
              Nathan
              KD9ARL

              μολὼν λαβέ

              1978 XS1100E
              K&N Filter
              #45 pilot Jet, #137.5 Main Jet
              OEM Exhaust
              ATK Fork Brace
              LED Dash lights
              Ammeter, Oil Pressure, Oil Temp, and Volt Meters
              Green Monster Coils
              SS Brake Lines
              Vision 550 Auto Tensioner

              In any moment of decision the best thing you can do is the right thing, the next best thing is the wrong thing, and the worst thing you can do is nothing.

              Theodore Roosevelt

              Comment

              • #8
                So I'm hearing two different things: that all the rears are the same (and are the same as the fronts for standards but not specials), and that the rears are not the same between specials and standards. For my sake and that of future wonderers, anybody wish to clarify this?
                1979 Yamaha XS1100 Special
                1969 (or '70 or '71) Triumph (Trophy or BSA) 250

                Comment

                • #9
                  Originally posted by Mendizale View Post
                  So I'm hearing two different things: that all the rears are the same (and are the same as the fronts for standards but not specials), and that the rears are not the same between specials and standards. For my sake and that of future wonderers, anybody wish to clarify this?
                  78-81 Standard and Special rear pads are all the same except for the 81 Midnight Special.

                  78-81 Standard front pads are the same as the rears of all XS11 models, except for the 81 Midnight Special.

                  79-81 Special front pads have a specific left and right side and fit only these bikes. The right side front is also used on the rear of the 81 midnight Special and the rear 82 XJ1100.

                  The 81 Midnight Special fronts also fit the front of the 82 XJ1100.

                  Probably more than you wanted to know, .
                  2H7 (79) owned since '89
                  3H3 owned since '06

                  "If it ain't broke, modify it"

                  ☮

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                  • #10
                    Originally posted by natemoen View Post
                    The rear pads of the US XS1100s are all the same, maybe the 81 mns is different though. The standard fronts are also the same as all the others rears.

                    http://cgi.ebay.com/ebaymotors/YAMAH...s#ht_558wt_939
                    Does it matter if they are organic or metal sintered pads for the rear? I recall reading a debate about this and thought that Mama Yamaha recommends organic on the back and metalic sintered pads for the front... is there any truth to this?

                    I need to replace my rear set of pads, I bought a pair of copper sintered pads for the front and am holding on them for whent he front need replacing... I know others have used both metallic and organic all around with no ill effects, just wondering if the manual states organic or metallic...
                    '79 XS11 F
                    Stock except K&N

                    '79 XS11 SF
                    Stock, no title.

                    '84 Chevy K-10 "Big Blue"
                    GM 350, Muncie SM465, NP208, GM 10 Bolt with 3.42gears turnin 31x10.5 Baja Claws

                    "What they do have is an implacable, unrelenting presence and movement that bespeaks massive power lurking behind paint and chrome. They don't wail like a screeching ninja, the don't rumble like a harley. They just growl like a spactic, stressed out badger waiting to rip your face off and eat your soul." Trainzz~RIP~

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                    • #11
                      Originally posted by WMarshy View Post
                      just wondering if the manual states organic or metallic...
                      Soooooooo you need a manual?
                      79SF
                      XJ11
                      78E

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                      • #12
                        Brake Pad Compatibility

                        Originally posted by bikerphil View Post
                        Probably more than you wanted to know, .
                        On the contrary, it's exactly what I wanted to know! I'm sure this info is available several times over on this site, but I was having trouble finding it. If it isn't clear from all of my previous posts, I have troubles in general. Readers will salute you, as I do now [insert formal salute emoticon].
                        1979 Yamaha XS1100 Special
                        1969 (or '70 or '71) Triumph (Trophy or BSA) 250

                        Comment

                        • #13
                          Sintered vs "organic" brake pads

                          To each his own, but my understanding of sintered pads is that, due to the increased metal content, they grab more and are hotter, and are therefore harder on rotors. At least this is true for cars and racing bicycles, where the braking advantage comes at the price of rotor longevity. Obviously, this would also be a function of riding style--I'm not super hot on the brakes because the XS engine is such a nice, big, slowing-down machine. But it's also a nice, big, speeding-up machine, so the brakes almost inevitably come into play...

                          I guess sintered pads are only a problem if you think new rotors for these beasts are hard to come by. If I thought members of this forum were the hot-blooded or vindictive sort--which I don't--I would try to allay the hail of pro-sinter comments by saying that I'm sure they're the best thing since stirrups, I have nothing at all against them, and that whether they reduce rotor life is not a theoretical question, but an empirical one.

                          Maybe somebody who won't be laughed off the forum (eg, not me) should set up a poll to see who has used sintered pads, and how they compare with regular pads regarding rotor wear? I'd be open to trying them if I thought they'd slow the old hoss down a little quicker, with little negative effect. Other negative effects might include increased strain on the caliper mounting points, but honestly they look pretty robust on these motorcycles...
                          1979 Yamaha XS1100 Special
                          1969 (or '70 or '71) Triumph (Trophy or BSA) 250

                          Comment

                          • #14
                            The BIG difference is how easy it is to modulate the brakes. Sintered pads will grab VERY WELL, once warm. The organic pads operate very well at most temps, and seem to be easier to modulate, or adjust braking force. Also, I think some of the pads do a litter better in the rain, and I know you need to worry a bit about that!
                            Drilling the rotors helps a LOT with wet braking, and can be done at home with a cobalt drill and drill press.
                            I just put on the EBC pads, and they work well and last about 40K to 50K miles.
                            Ray Matteis
                            KE6NHG
                            XS1100 E '78 (winter project)
                            XS1100 SF Bob Jones worked on it!

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                            • #15
                              Drilled Rotors

                              Drilling the rotors seems very appealing, but I might have to wait till the winter to get to it (or be able to afford it).

                              Should the pads really last that long--40k-50k miles? Mine have no grab left (read initial post) on a 15k mile bike, but I can't tell if they're worn through by looking through the viewing port. I guess I should just take them off to see, but I want to wait for the replacement pads to come in...
                              1979 Yamaha XS1100 Special
                              1969 (or '70 or '71) Triumph (Trophy or BSA) 250

                              Comment

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