HELP!

[Dunecrazy]

I am going to take a trip in a week to ride in a different elevation.

I have a 2001 Yamaha blaster. 310 main jet, open air box, reeds, Toomey Pipe.

I will be riding in approx 7000 feet above sea level.
I live in MN, about 900 feet about sea level.

HELP PLEASE!

do i just need a main jet, or do i need to adjust carb settings as well. :-D