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Old 06-07-2012 | 11:15 AM
  #3048  
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megasaxon
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Originally Posted by elkapitan
What does square stroke mean?
square stroke means the bore and stroke are the same number, in this case 16.42mm bore X 16.42mm stroke (ie 16.42X16.42 or 16.42 squared)

the RB S7s and S9s(also "Worlds" editions), along with a few others were all square stroke.

the newer RBs are all long stroke, 16.22mm bore X 16.80mm stroke
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