Take a look at these heads. I would get them in the 58cc version.
This page is the 64cc ones, it has the flow numbers on the bottom of the page along with other information. What do you guys think?
http://www.procylinderheads.com/f2204000180.htm
This page is the 64cc ones, it has the flow numbers on the bottom of the page along with other information. What do you guys think?
http://www.procylinderheads.com/f2204000180.htm