it's a cb500t...yeah, i have a feeling the rotor just slipped on the shaft hence even though it's tight, it's probably not on the shaft all the way. i'll have to wait until monday evening to go pick it up (earliest i could get a uhaul to haul it back) and i'll have to pull the rotor and take a look at it. hopefully i wont' have to get another rotor, but the more i think about it, the more likely it is that i'll have to. thanks for all the info.