Got another question gang regarding leaders.

Now with a 5WF line and a 5X leader I'm currently using, if I want to use larger flies, like a 2 or 4 fly hook, is it ok to just change the leader on the fly line to handle the larger flies? I would assume a leader in the range of 0-1X ... is this acceptable with a 5WF / 5W rod?

Thx's again,

Mike