i have just bought my first mx bike (cr250) and have been riding road bikes for a few years. took it out for the first time the other day and i seemed to get a little frustrated with my throttle control. i don't know if its the bike thats got a twitchy throttle or maybe just me, but everytime i go over small bumps/rutts/whoops, as i go over them i seem to be opening the throttle (not purposly) slightly and going way out of control. is it my arms locking up? my body positioning? i just don't feel in control. man, i even flipped it at one point. need some beginners help if anyone has any advice or maybe know of a website with a more detailed tutorial or something. HELP!!!!!!!!!!