The carb has not seen much use. I picked it up a number of years ago. The guy I got it from had added jet extension (without a notched float...) and a 50cc pump. I removed the extensions and put a 30cc pump back in. Went through it, gaskets, etc. Otherwise it seems to work pretty well although still need to do some tuning as I am still get some breaking up 3-4k RPM running up RPMs through very light throttle, however could be vacuum advance adding to much or possible related to this whistling issue maybe if it is going lean. Carb has stock 70/80 jets right now.

Other thread here from yesterday, but now that I know where the timing is (18 initial/38 total) on the test drive tonight I stood on it and it pulled really hard and sounds incredible (first time I have really gotten into it hard since back on the road) last fall.