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  1. #1

    Join Date
    Jun 2008
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    St. Charles Il
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    Fuji 750 & 780 Engines

    What are the differences between a Fuji 750 and 780 engine besides the larger cylinders bore dimension?
    What parts are interchngable?


  2. #2
    SPEED KILLS, BUT YOU GET THERE QUICKER Keddano's Avatar
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    Jul 2007
    Location
    Cedar Rapids,Iowa
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    6,381
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    Crank,Cases,intake manifolds,stator,starter,carbs(diff jetting),are the basics.

  3. #3
    She likes the bike. But the ski gets her wet!!!! xlint89's Avatar
    Join Date
    Oct 2006
    Location
    Cleveland OH
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    780 cases are slightly different and use reed spacers.

    Cyl porting is different, and the 780 has 2 more exhaust ports.

    Exh manifolds are different

    CDI timing is different

    780 came with a H.O. triple outlet fuel pump and same size carbs, but slightly different

    Jetting is different

    780 exh pipe has a smaller cooling orifice than the 650/750.

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