Step into it. Get directly to it, saying something along the lines of, "I'm, interested in more but right now I need...w/out me ya are gonna stand around picking each others noses & wish I were here."
Harley-Davidson people are usually of the same breed--many of them have one, have had one or more than one--but--they got there through metric means & usually won't discriminate against someone doing something similar (face the facts, you're likely to own a H-D in the future). The only ones that really, blatantly, discriminate are those that don't have one or, have never had any...&...feel they need to support a corporation which has yet to support them. But--hey--whatever. Dorks are everywhere!
Remind them who ya are, get what ya need, then get out of there; that disease is contagious.
But, often times, more than not, I've been somewhere and asked about something miscellaneous, usually they don't know about it and don't want to take responsibility about it, so, what happens is, ya need to get the piece ya need then IF it doesn't work--don't take it back. This usually puts them at ease a little with helping ya out (oddly...it could--not always--mean their job because they say yeah it'll work whenever it don't. That's why they are always hassling about make/ model; if a distributor or manufacturer makes a mistake it doesn't hang on them nor hang them).
Anyway, wishing ya well!