Chainsaw Repair

Just so happens I am a guitar player.   I do find this all very interesting but it is more about the theory for me than the math.   
When I studied electronics and we were discussing resonant frequencies and showing them on a scope, I don't remember but can there be more than
one resonant frequency or as in the case of a guitar more than one harmonic.   Its been 40 years since I studied that stuff. 

But hey I still find it interesting to read.   I do not leisure read and only like to read tech stuff.   

What I was really interested in seeing was what your finding were and what effect porting a saw had on the pressure waves for the intake.   To me it looks like it may help it more than hurt it.