If anyone could help me I would highly appreciate it. I have a 2000 300ex and having similar issues. Starts right up fine, will idle, but the second I snap the throttle from idle to wot real fast it bogs out at first or will even die if I don't let off wot quickly. Seems like when I'm riding with a load on it, when I take off it's boggish unless I play with the throttle. I cleaned the carb. But noticed it has a 118 main jet. Could having a 118 jet and full fmf megamax exhaust be the culprit? Also has k&n with two 1.5 inch holes in lid.