sorryd

i own a 2000 gs 400 and the same thing was happenning to me but i went back removed the abs sensor cleaned it and checked the inside (abs rotor back) to make sure it wasnt missing any teeth.after i made sure that the abs sensor it self fitted all the way in made it real tight but (careful screw can break) and this fixed the problem oh abs sensor does not use any type of washer in between