Guys, anyone have any experience with a Saito 72? I put one on my new UDC and it starts easily enough, but I noticed that when I pull the igniter off, the RPM's drop.

I have about 2/3 of a gallon of 15% through it so far, and the mixture screw is out about 1 1/2 to 1 3/4 turns.

whats the right way to set one of these up? I'm used to OS, this is my first 4-stroke.

Thanks