i gotta ask you guys.. what elevations are you having issues w the carb? we have two hawks , are at about 1k in the ozarks and having zero carb issues. check for air leaks first.
i've even got a mikuni in the box w a full range of jet sizes, that until i plan a mountain or beach trip, just aren't being touched. where is the op in texas? i think i'd talk to some other owners there at similar altitudes. aside from the "make it mine " crowd, the stock hawk has few issues, unless you want more than 35 mph :} then gear change is critical. resetting the idle mixture really helps almost everyone. online is a guy in vermont called cheetos or cheese something. has some good hawk related vids on youtube.
might even b on this board.
oh, and i run 16/45 and sustained 60-65 ish is no prob and i can still trail.