best carb choice?

Whats the largest size you can go and run the stock intake boots? Anyone got a link to these carbs?
 
a 30mm or a 35mm should work fine for that if you have pipe and other stuff the go with a 35mm or 38mm carb

If its mainly stock a 30mm will do fine. Are there any more mods to the motor? Unless its built really strong stay away from the 35 and especially the 38.