suggestion on carb size - built gy6 150cc
 

Looking for input on what size carb I should go with.

New GY6 150cc with the following mods:
63mm big bore
63mm matching head
A10 cam
+3 stroker crank


Ready to finish this build!
http://stolenmoto.com/wp-content/upl...ild_Powder.jpg

Stock-style carb ( Keihin style) w 120-130 main jet. Those flat-slide carbs don't really offer much improved performance, they're just popular because most people are willfully ignorant of stochiometrics.