NOOOOOO, not too tight, if you pull down too tight you could break the fork seals on your suspension. Not good,
I make sure, first, that the tie straps are through the fairings and not rubbing on them. Second, lean the bike towards you, left or right , and tighted the strap, just so that there's tension on the strap, then lean the bike towards you the other way and do the same. when your done, make sure that both straps have tension on them. Again NOT tooo much tension b/c you may realize that when you begin riding your front suspension may be bottoming out. Fork seals may break.