Cr250 piston and bore size


4 replies to this topic
  • and-why958

Posted 19 June 2013 - 07:02 PM

#1

Has there been any changes in bore and piston size from 1991 to 2007? I was wondering if an 01 cr250 piston would fit in my 91 cr 250? I measured with a caliper but its not accurate to read 66.4 etc

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  • Byron909

Posted 19 June 2013 - 07:52 PM

#2

86-96
97-01
02-04
05-07
Interchange years, pretty sure that's correct.

  • JDubya381

Posted 19 June 2013 - 09:50 PM

#3

86-96
97-01
02-04
05-07
Interchange years, pretty sure that's correct.


That looks pretty right to me, I'm not as positive on the 86-96 number, but I don't know much of anything about those bikes. Hard to believe big red didn't have an engine redesign that incorporated a change in bore diameter for a whole decade lol. But then there's the last HPP engine from 97-01, and the first case reed engine with the flat top piston, followed by the domed piston on the 05-07

  • Byron909

Posted 20 June 2013 - 04:28 AM

#4

Actually, since 86 the bore has been 66.4
Think stroke has Been the same since 81.

  • and-why958

Posted 20 June 2013 - 10:58 AM

#5

Awesome thanks fellas





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