I am new to motor-bicycling, but I have many years of 2-stroke experience.
I plan on building from parts, my bike, and will not start with the "complete kit."
For the engine, I intend to port the cylinder and cut the piston; and certain add high-performance intake/exhaust/ignition pieces; an effort to make more power than stock.
For a starting place, please help me to understand which bottom-end is best?
Extra points for explaining "why"