my br 600....starts fine and idles up to full throttle with no problem. about a minute later it turns off like you hit the switch. it doesnt seem to be a fuel problem because it doesnt choke out...it just turns right off. it has a new spark plug, fuel filter, air filter, and coil ignition module....all done this week. didnt do anything to change the problem. any help would be greatly appreciated....its got me boggled.