We don't know all the facts. We don't know if he bought an oem carb or aftermarket. If it was an aftermarket then I can imagine it not being quite perfect. As far as carbs go though your right. You do what you gotta do. I have never had to modify an oem carb on a honda engine just saying.
It is very important for you to post your results once the problem is solved so that people will be able to reference a solution to their problem down the road. YEARS may go by and someone has the same problem PLEASE POST YOUR "IT WAS FIXED WITH x SOLUTION.