I've got some questions about the carbs. Does 1 of them work at all times and the 2nd one kicks in from the mid to top end? Which one works throughout the whole range? The 1 on the left per chance? Is there a way to tell if the 2nd one is kicking in? Is there an easy way to richen the idle so it will start easier? I did something easy on my XR250L and it made it kick to life real nice (I just don't remember what I did). Thanks!