Thanks everyone, No tree on cyl. or crankcase H on cyl. exh. side 9 on intake side.
Crank has a metric thread 8x1 or 8x1.25 found a metal tag (under dirt) Mod. 40002804.
It has tree on it. single ring piston. Here is a great calculator for motors.
http://home.earthlink.net/~jalby/puter.htm