I have a 1998 wr 400. I have dual sported my wr. On my last dual sport ride, when reaching our off road destination, the bike did not want to come down from idle. I adjusted the idle speed and the bike came down a little. I rode the bike back about 29miles and the bike was doing the same thing. We took the carb apart only to find the throttle valve broken. I have ordered a new one and will be replacing it in next couple of days. My question is how concerned should I be with the fragments of the throttle valve that have vanished? The bike runs and no foreign noise is present.