Do I need to re-jet?

Hey all, I asked this in the yahmaha board, but thought I would ask it here, it's been awhile since I have been on this forum, but been really busy. Anyway, I have a 06' 660 with k&n filter and Pre filter, 26" ITP mudlite xtr's on 12" ITP type 7 rims. I have always rode in Maine, Where I live, ( this is sea level to about 1,000ft) however, I am being stationed at Ft Bliss Texas, with the Army, in el paso, tx and I will be riding in the 3,000-5,000 ft range.. Should I get my Carb rejetted, (I am still on factory settings), maybe with a dyno jet kit? What about those dial a jet kits? (is it true factory is set pretty lean as it is?) I have no experience jetting a carb so I would be having it done, but I was wondering if I even need to at this elevation change? Does this lean it out more? Any help would be greatly appreciated.
thanks
MGR