+1 on all the above. The carb in question is the Kiehn FCR 39mm that used to (possibly still does) come on the E model. The thumpertalk store sells the whole kit ready to bolt on for about $600. That may sound steep, but it's and instant 3 HP. The most you'll get from any mod without cracking into the engine. Where you at in the NC mountains anyway?You can get some decent power out of the DRZ motor with a 3x3 mod, exhaust, and re-jet. If you really want to go another step get the upgraded carb (can't remember the name). And lasty, if all that doesn't work, go with a big bore kit.