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    USD fork identification help

    I recently picked up a bike that has 91 GSXR usd forks or so I was told. I need to change the fork seals and I do not know which ones I need to get. The previous owner had someone else do the swap for him and does not remember if they are from a 750 or an 1100. If in fact they are from a 91 GSXR how do tell what size bike they are from?

    #2
    The 1100 forks are longer. I forget the dimensions.

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      #3
      Measure the lower part of the fork, the shiney part where the seal rides , the 1100 is a 41mm, and the 750 is a 43mm according to the PU catalog.
      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

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        #4
        Thanks guys, that atleast gets me in the right direction. Any easy way to verify what they really came off of in case they are not from a 91 gsxr? They are not gold but they came with 6 piston Tokico calipers but I think these may have been an upgrade from the original 4 piston calipers. Will 6 piston calipers easily mount to 91 gsxr forks without the use of adapters?

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          #5
          the 1100 came with them later on. They are a direct bolt on.

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