loose handlebars
alright, so i tighten my stem with my handlebars at a 90 degree angle to the floor. After a few bunnyhops, i notice that the handlebar slowly moves back, to the point where it almost hits my knees (then wont go any further back). What ive noticed about the handlebars is that at the part where the stem locks onto it, it's kinda squeezed into an odd shape. Is it time for new handlebars? new stem? or is there something i can do?
i already tried cutting an old tube out and wrapping it around the handlebars, but even with the stem fully tightened, it moves alot
btw, the parts i described are the stock GT stem and stock GT handlebars.