The moped is running the best it has ever. I got a vm20 and estoril pipe and changed the gears to 16/40 from 14/45. The low end is impressive - pulling the front wheel off the ground but I took a hit on the top end - maxing out at high 40s. The moped was previously going 55+ with the 15 bing and boss pipe but was a slug off the line.
I haven't played with the jetting for the carb yet. I am running the stock 180 main, 25 idle. If I went to 18/40 gearing would I get more out of the top end or should I put in a bigger jet?