Triple Clamps and Bars

The easiest (cheapest) solution is probably to buy a set of bars with more rise. Most of the big bar manufacturers offer numerous bar geometry configurations.

Bear in mind that if you're new to dirtbikes or have just gotten back into it after a long hiatus, the seat-pegs-bar relationship is quite a bit different than it used to be. In particular, the seat and bar height will be much closer, giving the feeling of sitting 'on' the bike rather than 'in' it.

Then again, you don't want to be banging your knees on your bars. ;)

It really just comes down to personal preference.

2c.

-Pace