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Difference between Short & Long stroke engines?

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  • #31
    good thread.

    Originally posted by Samarth 619 View Post
    As far as I think, YZF R6 is the highest revving road bike ever. I'm not sure though. Let's find its piston speeds @ 16,000 rpm! R6 has a 67 x 42.5 mm. Very short stroke!
    the CBR 250RR redlines at 19,OOO RPM
    .
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    • #32
      Originally posted by aargee View Post
      But Ji, isn't that 50mm universal accepted stroke size? That's what I understood from the posts. Did I get something incorrect? Pls guide. Tks.
      The way I understand it is, engines are defined as square, under square and over square by the very nature of Bore X stroke..
      A over square is considered short stroke and under square is considered long stroke..
      Stroke ratio - Wikipedia, the free encyclopedia
      When Was The Last Time,You Did Something For The First Time.

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