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What type of work is done on the upper case to increase the flow from the transfer ports, if any? For some reason I just thought about this over the weekend. Mine is tore down due a crank failure and while looking at the case it dawned on me that it is identical to my stocker. The transfers on the cylinders are opened quite a bit but the matching area in the case only has one 4 or 5mm hole in it . There is another indented hole that isn't a through hole for each cylinder also.
What type of work is typically done in this area for improvements? I know you need to match your gasket to the case and then the cylinder to avoid any type of flap or obstruction. Would opening up the holes help or would it simply reduce the air velocity?
What type of work is typically done in this area for improvements? I know you need to match your gasket to the case and then the cylinder to avoid any type of flap or obstruction. Would opening up the holes help or would it simply reduce the air velocity?