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    #1

    cbr rotors?

    I have been searching for information about the CBR rotors , LOoking to find which ones and are they a direct bolt on to our beloved GS wheels? Thanks in advance
    1984 GS1100GK newest addition to the heard
    80 GS 1000gt- most favorite ride love this bike
    1978 GS1000E- Known as "RoadKill" , Finished
    83 gs750ed- first new purchase
    85 EX500- vintage track weapon
    1958Ducati 98 Tourismo
    “Remember When in doubt use full throttle, It may not improve the situation ,but it will end the suspense ,
    If it isn't going to make it faster or safer it isn't worth doing
    Tags: None
    #2
    None as far as I can tell. You'll need spacers and to shave some material off the speedo drive housing. I believe the most common ones are the 296mm ones. I'm sure some more in the know than me will chime in soon.

    Comment

      #3
      I have rotors, make me any offer. They must go.

      Toddk
      1979 Suzuki GS1000always wanted one, 1983 Honda CB1100F Hot Rod(does that show my age), 1984 Kawasaki GPZ750(rain bike)

      Comment

        #4
        The best rotors

        The ideal rotors are from the Honda CBR 900 RR Fireblade 95-97. These rotors are a direct bolt on but a bit hard to get hold of. All that is required is to drill the 6mm holes out to 8mm and they bolt straight on. No spacers, etc. like with the CBR600 rotors.

        The important information is Dia. 296mm. Thickness 5mm. Offset 17.2mm. Bore 58mm. PCD 78mm.

        Hope this helps.

        Comment

          #5
          Originally posted by Suzuki_Don View Post
          The ideal rotors are from the Honda CBR 900 RR Fireblade 95-97. These rotors are a direct bolt on but a bit hard to get hold of. All that is required is to drill the 6mm holes out to 8mm and they bolt straight on. No spacers, etc. like with the CBR600 rotors.

          The important information is Dia. 296mm. Thickness 5mm. Offset 17.2mm. Bore 58mm. PCD 78mm.

          Hope this helps.
          Yes this is what I have been searching for, although you say the 95-97 fireblade are the best because they are a direct bolt on with just boring the holes larger . Is that the same with the 600 rotors? I have a set of 600 rotors coming on a F3 that I got for parts just have not picked it up yet, buried in snow. I also have the Kawasaki zx6e calipers from a bike I stripped for parts a couple years ago.Thank you again
          1984 GS1100GK newest addition to the heard
          80 GS 1000gt- most favorite ride love this bike
          1978 GS1000E- Known as "RoadKill" , Finished
          83 gs750ed- first new purchase
          85 EX500- vintage track weapon
          1958Ducati 98 Tourismo
          “Remember When in doubt use full throttle, It may not improve the situation ,but it will end the suspense ,
          If it isn't going to make it faster or safer it isn't worth doing

          Comment

            #6
            600 rotors are different. That's why he said the 95-97 900RR rotors are best becuase they don't need spacers like the 600 rotors.

            Comment

              #7
              From an EBC catalog, it appears that the 95-98 cbr600 F3/SJR/SE rotors are the same size as the 95-97 cbr 900 rr fireblade rotors.

              I have two sets of F3 rotors and have bolted one set to my 650, like Don says just need to drill out mounting holes to 8mm and bolt right up.

              From what I can tell, the difference between cbr 600 F3 and cbr 900 rr are quantity of holes in rotor, 900 RR has many more. I personally like the 900 look better, but for every 900 rotors available on eBay, there are probably 5 times as many 600 F3 rotors.

              I was hesitant to respond to this since even with new rotors, you will need to use different calipers and therefore some sort of different mount will need to be acquired. Check with Salty Monk, he has been making adapter plates to mount up kawasaki twin pot calipers to these honda discs.

              Somewhere in the forum was a printable template to make your own adapter plate, but I can't locate it anymore. It is not impossible to manufacture your own, but I am sure Dan's (salty monk) will be happy to sell you a set.

              Comment

                #8
                Either set requires a spacer to get correct offset. It's just that one set you have to drill completely new holes between the existing ones as well as the PCD is wrong whilst the other just needs them enlarging from 6mm to 8mm.

                You can use the spacer as a template. Your 600 F3 rotors are the type that need to drill completely new holes.

                Waterman - did you "enlarge" the existing holes off centre on that F3 set? I've not seen any other than the ones Don mentions with the correct PCD.
                1980 GS1000G - Sold
                1978 GS1000E - Finished!
                1980 GS550E - Fixed & given to a friend
                1983 GS750ES Special - Sold
                2009 KLR 650 - Sold - gone to TX!
                1982 GS1100G - Rebuilt and finished. - Sold
                2009 TE610 - Dual Sporting around dreaming of Dakar.....

                www.parasiticsanalytics.com

                TWINPOT BRAKE UPGRADE LINKY: http://www.thegsresources.com/_forum...e-on-78-Skunk/

                Comment

                  #9
                  Originally posted by salty_monk View Post
                  Either set requires a spacer to get correct offset. It's just that one set you have to drill completely new holes between the existing ones as well as the PCD is wrong whilst the other just needs them enlarging from 6mm to 8mm.

                  You can use the spacer as a template. Your 600 F3 rotors are the type that need to drill completely new holes.

                  Waterman - did you "enlarge" the existing holes off centre on that F3 set? I've not seen any other than the ones Don mentions with the correct PCD.
                  Yes, I did have to enlarge the existing holes off center to get everything to line up.

                  I am a little confused on PCD, the EBC catalog that I used for reference shows that it was 74 for both F3 and Fireblade rotors. It may be incorrect since they list an oversize rotor for Fireblade with PCD at 78 .

                  Comment

                    #10
                    Originally posted by waterman View Post
                    Yes, I did have to enlarge the existing holes off center to get everything to line up.

                    I am a little confused on PCD, the EBC catalog that I used for reference shows that it was 74 for both F3 and Fireblade rotors. It may be incorrect since they list an oversize rotor for Fireblade with PCD at 78 .
                    My catalog also lists the95-98 F3 and the95-97 900RR[fireblade] with the same part#
                    1984 GS1100GK newest addition to the heard
                    80 GS 1000gt- most favorite ride love this bike
                    1978 GS1000E- Known as "RoadKill" , Finished
                    83 gs750ed- first new purchase
                    85 EX500- vintage track weapon
                    1958Ducati 98 Tourismo
                    “Remember When in doubt use full throttle, It may not improve the situation ,but it will end the suspense ,
                    If it isn't going to make it faster or safer it isn't worth doing

                    Comment

                      #11
                      MetalGear International PTY LTD
                      http://www.metalgear.com.au/
                      MetalGear International PTY LTD based in North Brisbane is a manufacturer of motorcycle, scooter and ATV brake discs and brake pads as well as refurbishment specialists of classic and collectible motorcycle brake discs. Call our Sales Team now for more information.


                      these guys have better/more info on rotor specs

                      Comment

                        #12
                        ^I really like that site...I just wish you could search rotors by criteria such as offset, hole pattern, and diameter. I really want a set of 5-lug rotors in 320mm on a 19.5mm offset...it won't really let you search that way, though.

                        Comment

                          #13
                          I am just going to try the ones I have when I get the bike home and if they don't just drill and bolt I will pick up a set on E-Bay there are about 5 sets listed right now , that saying that the ones needed are the 95-97 900 fireblade ones
                          1984 GS1100GK newest addition to the heard
                          80 GS 1000gt- most favorite ride love this bike
                          1978 GS1000E- Known as "RoadKill" , Finished
                          83 gs750ed- first new purchase
                          85 EX500- vintage track weapon
                          1958Ducati 98 Tourismo
                          “Remember When in doubt use full throttle, It may not improve the situation ,but it will end the suspense ,
                          If it isn't going to make it faster or safer it isn't worth doing

                          Comment

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