well i have some bmx experience but none that has anything to do with tricks other than the stander trick wich is probly something at any 5 year old can do but i would really like to know what i could do to it to make it smoother for instance i set the front tire up prefectly but the back tire when spinning still tries to turn the crank a little and will turn the crank aobut a 1/3 of a turn then stop and turn again what do i need to do to fix this so the crank wont move when the back tire is spinning