Take your airbox off and double check the level of the slides. If they're open more than an inch or so, that's probably the answer to the high idle. Kind of weird that it would shut down once the revs got high.
2000 XCSP 700: Edge rear suspension, 1.25 Ripsaw, 144 Accord Racing Warthog ZXP studs, Sportech Decals, Stripped Tunnel, 3" Riser, Gutted Airbox, Boyesen Rave Valves