How does cid make power?

67autocross said
****….now I have to spend the whole evening trying figuring out why my Yamaha YZ 250 2 stroke is faster than the YZ 125 sitting beside it…

What you should be thinking about is why a 250 2T makes more power than a 250 4T. Which is exactly why AMA and the morons running dirt bike racing make a 250 2T run with 450 4T’s.

That’s what you should be considering.