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1970's engine swap - 2 stroke to 4 stroke

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  • #1

    1970's engine swap - 2 stroke to 4 stroke

    Greetings,
    I'm brand new here. I have an early 1970's Argo 6x6 with a Chapparal 2 cycle engine. I would like to swap over to a 4 cycle. I have a 20hp Kohler Command V-twin with a 1-1/8" shaft. I would like any insight you folks could provide on doing this swap. What issues need to be considered? Is there enough room to fit this engine in the buggy and get proper clutch and belt alignment?
    Thanks in advance.
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  • #2
    WOW, I personally have never seen the Chap 6 wheelers before and here 2 showed up in the last week.

    As far as the swap, you will have to modify the existing powerpack frame as it should have a raised portion that the 2 stroke sits on, the tecumseh machines were just a flat plate that may need to be altered for the engine to orient properly. The engine would need a new 1-1/8 drive clutch for the engine that hopefully matches the current belt size of the driven convertor ( or that would be needed aswell). Wiring and exhaust work will be needed. It should fit ok, there are quite a few threads and swaps on this forum and pics of those machines are in the gallery if you can find them. The biggest thing with the swap is how clean you want it to appear, either seamlessly or not.
    sigpic

    My new beer holder spilled some on the trails - in it's hair and down it's throat.
    Joe Camel never does that.

    Advice is free, it's the application that costs.

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    • #3
      2 strokes rule .
      Mix the fuel and hang on , ring ring!!!
      ST400R ATTEX(Smiley)
      500 Super Chief


      I love the smell of Blendzall in the morning

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      • #4
        70s Argo

        Originally posted by 70sArgo View Post
        Greetings,
        I'm brand new here. I have an early 1970's Argo 6x6 with a Chapparal 2 cycle engine. I would like to swap over to a 4 cycle. I have a 20hp Kohler Command V-twin with a 1-1/8" shaft. I would like any insight you folks could provide on doing this swap. What issues need to be considered? Is there enough room to fit this engine in the buggy and get proper clutch and belt alignment?
        Thanks in advance.
        You have a very old machine. I would love to see some pictures of it. If you have the serial number of your machine either O.D.G or Fox Valley can tell you what year exactly it is. Good luck

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        • #5
          I'd like to see some pictures also, the frame and axles along with the engine bay. Is it ABS or a poly body machine? My ABS machine has a Kohler with the one piece 7/8" axle sprocket set up, I can only assume yours has either the 1 inch or 1-1/4 inch axle set up with pinned detachable sprockets.
          sigpic

          My new beer holder spilled some on the trails - in it's hair and down it's throat.
          Joe Camel never does that.

          Advice is free, it's the application that costs.

          Comment

          • #6
            Hey Guys,
            I'm trying to post some photos and can't figure it out. How do you post photos?

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            • #7
              Originally posted by 70sArgo View Post
              Hey Guys,
              I'm trying to post some photos and can't figure it out. How do you post photos?
              Check out this thread: http://www.6x6world.com/forums/6x6-w...-pictures.html

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