I have ported one before. Made enough power to move a Tamiya TGX 1/8 scale and shift it into 2nd with some oomph. It is a good motor to experiment different porting/mods. But, get a two-needle carb for it afterwards. It helps in turning and sweezing a bit more speed out of the motor due to the low-end needle.
It's not what you know; it's what you can prove.
The only thing that is for sure is that nothing is for sure!!!
The needs of the many outweigh the needs of the few, or the one.
There are 2 things in life that are infinite: the universe and stupidity.