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Cant Leave It alone!!

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    Cant Leave It alone!!

    Bought a 1150 a while ago and now its coming all apart, I wanted to build up the engine a bit and the thought of using BUSA Pistons and trying to make up something cheap. Has anyone used hayabusa pistons in a GS 1150 yet? I guess the kit would enfd up being like 1404 or close to that size?/ with the stock Busa 81 mm pistons? I guess a big block would be required? Then old gsxr liners perhaps? Thanx Mike

    #2
    Cant Leave It alone!! Hmmmm
    Johno

    current rides 1981 GS1000G and 2005 GSX1400
    1977 Kawasaki KZ400 D4

    previous bikes 1978 GS1000HC
    1977 GS400
    1974 Montesa 250
    1960s Kawasaki 175

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      #3
      81mm bore with stock stroke of 66mm will make a 1360.

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        #4
        Different valve pockets, less compression with busa pistons, lots to machine of the block, YI take it m=not too many people bother to do this. Just an idea. Lots of busa pistons around. May of been cheap. Thanx Mike

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          #5
          Guys have done this build with oil cooled GSXR sleeves & Busa pistons. The problem with going this route, to ME, is the wrong pin location on the pistons. This requires decking a TON off the block to get to a zero deck height. I would rather just buy a big block & correct pistons & do it that way. You will have as much, or more, in sleeving & decking a block as what you could buy a used big block for. The only real price difference would be a set of pistons but I see them used all the time too.
          Ray.

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            #6
            Thanx for replies Guys . I was cleaning up in the shop found a brand new MTC big block and piston set with rings, unfortunately they are turbo kit from a long ago forgotten project. Anyone have a old turbo kit laying around? Mike (For GS of course!)

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