hey, i just put wheel bearings in a buddy's yz250. i lubed em up good and pressed them in properly. put the wheels back on, and when i tighten the axles, the wheels don't want to very easily. like almost like the brakes are on just a little bit. (but they arent) is this because they are new bearings and need to be worked in, or am i tightening the axles too much, or did i do something else wrong?