Hello KX5E16, I too have an 04kx500 and really like that thing. I have a freind who has a ratty IT200 with a fresh engine in it, have you ever heard anything about transplanting the engine into a YZ125 ? If you have, personal message me with any information, as I really would like to help my friend put his good engine into a newer bike and dust off the other 125's.
I dont race yet but I do trail ride a lot. I thought I was fast, until this year when trail riding with a group of racers. I was impressed at just how fast some guys are.
Congrats on making it to "B' class, that should provide many good memories and enable you to fly by guys like me.LOL John