I wanted to do it to my bike, but I'm having trouble finding the resources to build a 5mm stroker crank (need the machine work and a shorter rod) also I wanted to design a flat top, single ring, high compression race piston but wiseco wants a 20 or 25 piston purchase for one off pistons, at about $80.00 each thats more money than my little shop can swing right now. (but man would a KDX 300 with a 00 KX125 frontend be sweet!!)
agitt73: to find the displacement use this formula:
b*b*s*.0007854 = cylinder volume in cc's, * the amount of cylinders = total displacement
b = bore
s = stroke