i busted a rear bearing on my zzr the other day. i didn't know what it was so i kept riding for a day, only gettin the wobbles when gearing down to 2nd and first... then i asked a mate to have a look. go to change the bearing and i've cut up the whole inside of the wheel, so new wheel it was for me. at least it was easy to change....... anyways; i put this in new riders just to remind everyone, when something goes wrong on your motorbike, dont be an idiot like me, DON"T IGNORE IT CHECK IT AND GET IT FIXED... had that been a front bearing i kept riding on i'd be a sore boy today. plus I've worn the crap out of my brake pads extremely unevenly. so for SAFETY and PRICE reasons.... always maintain and expect your bike even if you THINK something is wrong.