I've stripped my carbs today so can confirm it is as far as I'm aware set to US specs going by the carb guide on here. The one thing I have noticed is that the mixture screw was a lot more than the book starter point of 3/4s of a turn out, more like 2 1/2 on the choke carb which might explain the popping?
Not my thread. This is Crasedkiwi's thread. Although he might get some helpful information from your posts you have hijacked someone else's thread.........Didn't you start a build thread of your own??