How many cc’s is my dirt bike if I put in a 2nd over (.50 over) piston and clyinder in it?

July 1st, 2009  | Tags: , ,
Over 50
Jonathan H asked:


It is a 250cc 2 stroke dirt bike.
Actually it is .50mm over. Does this make a difference?

Xavier
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  1. Kevin W
    July 4th, 2009 at 19:17
    Reply | Quote | #1

    itll be 375cc’s if its .50 over. make sure it says .50 and not 50. because that just makes it a 300cc

  2. vtwin_doc
    July 6th, 2009 at 18:10
    Reply | Quote | #2

    The honda crf250r dirt bikeit is rated as 250it is actually 249its bore stroke is 768mm stroke is 538this equals768×768x538×78542492ccboring your cylinder 50mm will equal 773×773x538×78542525cc.

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