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  • Engine project

    Building a V4 from scratch;



    http://moto2-usa.blogspot.com/2010_03_21_archive.html
    Paul Compton
    www.morini-mania.co.uk
    http://www.youtube.com/user/EVguru

  • #2
    Interesting build. For the prototype, they're taking a Kawasaki Ninja head, slicing it on a bandsaw, and TIG'ing the water channels closed:

    "For our first engine iteration we will be using sectioned ZX-6R cylinder heads to enable us to develop a stable and low loss bottom end without chasing induction, combustion and exhaust issues.

    Scott Kolb of Kolb Machine, was willing to do a quick test head and see how the passages would seal up and the resulting heat input affected valve seat retention and deck flatness. A cheapie eBay head served as the test mule and taking it to the bandsaw resulted in the following part to be welded:"




    "Twenty years from now you will be more disappointed by the things that you didn't do than by the ones you did."

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    • #3
      Looks almost like a Honda CX engine with two more cylinders. The engine being above the transmission sure makes it tall.

      Looking at the rendering I want to say, Oh, another one of those. Why?
      Gene

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      • #4
        Originally posted by topct
        Looks almost like a Honda CX engine with two more cylinders. The engine being above the transmission sure makes it tall.

        Looking at the rendering I want to say, Oh, another one of those. Why?

        Precisely my first thoughts as well.
        Looking a little deeper gave me some insight into their design philosophy.

        The overall engine assembly is very short front to rear to enable a long swingarm in a short wheelbase. The resultant slight additional height compared to a normal I4 is easily accommodated by the unique chassis needed for the Hossack-style front suspension.
        Lots of machining content on this page:
        http://moto2-usa.blogspot.com/
        Home, down in the valley behind the Red Angus
        Bad Decisions Make Good Stories​

        Location: British Columbia

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        • #5
          This is interesting,

          http://moto2-usa.blogspot.com/2010/0...-overview.html

          But then why oh why did it make old Harley cry.

          http://www.blaisracing.com/assets/images/guessbike4.jpg
          Last edited by topct; 09-17-2010, 04:03 PM.
          Gene

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          • #6
            I don't see how making it a V-4 shortens the engine, since they are reducing width across the bike not front to rear. It still has to have a gearbox!

            One thing a V-4 definately does is increase the part count, internal frictional losses and raise the center of gravity of the engine - none of which are desirable.
            Peter - novice home machinist, modern motorcycle enthusiast.

            Denford Viceroy 280 Synchro (11 x 24)
            Herbert 0V adapted to R8 by 'Sir John'.
            Monarch 10EE 1942

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