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  1. #1
    ryandi2's Avatar
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    Question domestic engine question

    i have been reading up on some of these threads.. and i see that you can take a base 650 fuji motor and swap the jugs and pistons ect to get a 750 or 780.. now my guestion is can you do the same thing and take a 1050 and swap jugs and pstons and what not from a 1200 with out much pain?

    (this is for furture refrence)


  2. #2
    You can go 900 to 1050 with a simple top end swap. I don't know about going up to a 1200 but I suspect the stroke is different. At least none of the crank part numbers match up between a 1050 and a 1200.

  3. #3
    Hayabusa's Avatar
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    Quote Originally Posted by ryandi2 View Post
    i have been reading up on some of these threads.. and i see that you can take a base 650 fuji motor and swap the jugs and pistons ect to get a 750 or 780.. now my guestion is can you do the same thing and take a 1050 and swap jugs and pstons and what not from a 1200 with out much pain?

    (this is for furture refrence)

    A 900-1050 cases can be used to make a 1200 however, they require a small amount of machining to make them work.

  4. #4
    ryandi2's Avatar
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    Quote Originally Posted by Hayabusa View Post
    A 900-1050 cases can be used to make a 1200 however, they require a small amount of machining to make them work.
    so that would involve a hole engine tear down.. i was looking for more of a jug and head swap type of deal... i assumed that they where the same.. like the 650 to 780..

    thats good too know i can do that with a 900 - 1050 if i get my nabor too let go of his..it just sitts there.. lol

  5. #5
    PolarisNut's Avatar
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    900 and 1050 use a 68mm stroke crank and the 1200 is a 70mm. 900-1050 swap is easy, and is worth quite a bit of power. Look for the 009 1050 cylinders...they are the "better" ones.

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    ryandi2's Avatar
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    thanks nut!! will keep that in mind if i do end up getting a 900!

    but is it that much more power between a 900 and 1050?

    here is anouther question.. say i took the 1050 out.. would the 1200 drop in or diffrent mounting points..?

  7. #7
    Click avatar for tech links/info, donation request K447's Avatar
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    Quote Originally Posted by ryandi2 View Post
    ...here is anouther question.. say i took the 1050 out.. would the 1200 drop in or diffrent mounting points..?
    All the carburetor red domestic three cylinder engines are the same size and shape on the outside.

    The fuel injected Ficht engines have a larger flywheel housing, but otherwise they are also the same dimensions.

    All will mount to the same engine mount locations.

    Sometimes the exhaust manifold and pipe are laid out differently to fit different hulls, but you can often mix and match those between engines.

  8. #8
    ryandi2's Avatar
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    Quote Originally Posted by K447 View Post
    All the carburetor red domestic three cylinder engines are the same size and shape on the outside.

    The fuel injected Ficht engines have a larger flywheel housing, but otherwise they are also the same dimensions.

    All will mount to the same engine mount locations.

    Sometimes the exhaust manifold and pipe are laid out differently to fit different hulls, but you can often mix and match those between engines.
    hey thanks k! im going to run the set up i have now!! untill i need to rebuild! (knock on wood thats not for a while) but i start getting in to those options i was just very curious if i could do a easy head swap... (these are thoughts that are going threw my head while im waiting for my fuel line to get in)

    like i said in a earlyer post i might get a chance too get a 900 but if thats the case id could swap it to a 1050 with out too much hassle!

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