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Thread: 8V 750/850 top end swap

  1. #1
    Join Date
    Sep 2015
    Location
    Amsterdam
    Posts
    46

    Default 8V 750/850 top end swap

    I have read about it but canīt find it anymore.
    The first gen. 850 cylinders should fit the 750 (8V) casings.
    But what was that little detail about clearance; was it a problem with the second gen. 850 ?
    Or do the first gen. also need to be cleared ?
    I donīt want to grind the loaded cases and i am to lazy to split the cases.
    Under no circumstances should both hands be removed from handlebars.
    (1977 owners manual)

  2. #2
    Join Date
    Feb 2011
    Location
    Co durham uk
    Posts
    593

    Default

    It's a bit of a lottery I think. I did that conversion before and had to open up the cases slightly to get barrels to fit. Others have not need to.
    My bikes 79 GS1000 1085 checked and approved by stator the GSR mascot and 77 GS750 with 850 top end, GS850g, and my eldest sons 78 GS550, youngest sons GS125. Project bike 79 GS1000N

  3. #3
    Join Date
    Sep 2015
    Location
    Amsterdam
    Posts
    46

    Default

    Oke, thanks for the reply.
    Under no circumstances should both hands be removed from handlebars.
    (1977 owners manual)

  4. #4
    Join Date
    Sep 2015
    Location
    Amsterdam
    Posts
    46

    Default

    I got a cilinderblock from ī79 and it had interference.
    Not shure wich year the casings are.
    Just the last inch or less on the front half circle of the cilinders and a bit on the rear corners of 1 and 4.
    The dremel helped out great.blok dremel k.jpg
    Under no circumstances should both hands be removed from handlebars.
    (1977 owners manual)

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