I'm messing with mine now its a pain it the butt. I figured I rebuilt the entire thing top to bottom I should be able to figure out the carb but its been fun for about a week.. I do know before I tore mine down It had a high compression piston 12.5/1 full fmf exhaust and k&n with no lid also had the cam mod done I had a 172 main. 48 pilot and the mix screw was all the way in. not sure what they come with stock but you should be good with a 170 main 48 pilot and 2.5 turns out on mix screw. you might have to play with the main if it burns to hot

 

also rec. doing the cam mod if not done get alot more power out