What is the inside diameter on the zilla reed inlet? And the other reeds you guys suggested?

What I am looking for is more low and mid rpm range power, since I do more trails then anything else. I don't race, this quad is just for fun so I am looking for reliability while also taking advantage of what I currently have. I just resleeved it to stock 67mm; It already has a port job done, according to the shop that resleeved it but have no idea of the specifics; FMF Fatty gold and PWK39mm. I can't make up my mind about whats better - larger reeds or smaller carb 

How would the stock TM34 compare with a stock PWK 36mm from a kx125, for example? Would that even come close to being the ideal carb for my set up? Also, can I assume that all PWK carbs are universal as long as the jetting is right?

Thanks for all your help guys, this is my first toy ever so I am pretty new to all of this, and it can get frustrating with all the things I still need to learn. Appreciate all of your help.