I would have some issues with a "new 04" as far as old gas is concerned (fuel system has had this gas sitting in it for a long time). It could be a fouled or clogged injector. It could be a fuel regulator problem or fuel pump check valve issue, also caused from old stale gas.
As far as the engine revving when the bars are turned, it could be a miss-routed throttle cable or it is not adjusted properly (not enough free play)
Ron
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