[JERSEYDEVIL]

as a point of reference for you, i have chinese 250cc quads i sell and i sell them with the 606 already installed. they usually run great with the stock jetting 22.5 pilot, 190 main. now i just put one in an SSR sr189 dirtbike of a customer and it was 17.5 pilot/ 230 main.
most 150's i jet are 15/17.5 pilot with a main range of 180-200
looking at it and i might be wrong cuz no 2 motors jet the same but not reading the motor thread i'm gonna guess 22.5 pilot, 210-230 main.......just a guess, let me know if i was close.
p.s. working on your kit today so you'll be hearing from me.