You should do each mod one at a time. Get the stock carb tuned for that pipe and then you'll know where to go from there. Is that pipe meant for a 49cc?
Oh god I told them before shipping to please send the PZ16, or the 16mm version.. no reply.. SHIPPED... asked them again if they sent the 16mm version... again. nothing..
Well it is Sunday so maybe they are off today. It took a week to get a response on a go pro I ordered. I was just about to contact PayPal about a refund when they shipped it. Some guys ship really fast, others meh, not so much.
Hope it works out for ya. Nothing like having to wait longer hahaha