Tady doesn't have a 6x Jr...it's Salas.
http://www.jigstop.com/store/listproduc ... 76aaa99c5c
According to these people, the 6x Jr. is 4.5 oz.
Also, most rods will have a "Line Rate", "Action" and "Lure Wt." marked on them. The 6x Jr. is not a very big or super heavy lure so you shouldn't have any problems.
And since you really can't have "too many" of them, you could always just buy one (or a few) and keep them in the tackle box. Try it and decide whether if it works for you.
If not, you have a choice of getting a new rod or selling it to Hakaveli!! He'll buy it for sure!! AHAHAHA!