Bike is a 99 wr 400 took it out and rode 100 miles of trails in northern michigan wow what a blast!!! bike still runs fine but noticed when cracking the throttle a bit while running or shut off there is a brass rod on left side of carb with a rubber boot on it squirts gas out of it no idle bog ?? Kinda unfimilar with 4strokes im guessing this is part of acc pump?? any help would be greatly apperciated thanks !!!