Hey man what is happening is your hyper extending your axle and when you land your bike all 900#s is forcing that axle to bottom out on the inside of the axle cup. Theres not muck you can so without spending the cash. cheapest option is a nice set of shocks or contact gorilla-axle.com and get you some top of the line axles. Your shocks need to be as stiff as possible to keep them from shuving all the way back in the cups.