KTM 420 Mikuni carb swap

[sachsmx]

I am rebuilding my 1980 KTM 420 mx'er and would like to put a new 38mm Mikuni round slide carb on it. Does anyone have any jetting specs for such an application?
I already have the carb, by the way (bought from Pro-Flo). So ordering one set-up isn't an option. Thanks in advance.