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View Full Version : any body have a 300ex bore size comparrison chart



Uphill Rush 450
06-21-2008, 11:09 PM
do any of you guys have a chart that compares the size of the piston (mm) to the size of the bore for all of the sizes for a 300ex?

ex.

.80 = 297 cc's

JohnT_98300EX
06-22-2008, 07:49 AM
Just my own rough figures.
+ 1 mm = .040 or 7.5 cc
a 300ex at +1mm or .040 is 289.5 cc (+ or -)
+2mm = 297 or so and so on