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  1. rubyfocus

    V4 Valve timing question

    Hi folks- I'm in the midst of, I guess you could say, re-designing the wheel, but I'm trying to figure out the valve timing/firing order for a V4. I've spent a lot of time going over the geometrical aspects using a firing order of 1-3-4-2 (See attached PDF file for the layout), but something...
  2. rubyfocus

    Otto 4-stroke ala Jan Ridders

    Here's my version of Jan Ridder's Otto 4-stroke. I took a little artistic liberty with it.....
  3. rubyfocus

    Another Jan Ridders joint

    Here is my latest engine, compliments of a design by Jan Ridders. It still is yet to run, and as I understand it might take a little doing to get it to do so. Looks real cute tho! Richard
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