im doing new rear wheel bearings on a 99 yz400f. the bearings are sealed and i didnt think they needed grease. but when i pulled the old seals it was packed with grease between the old bearing and the seal. just on the outside of the bearing the wasnt much on the inside. it seemed like wheel bearing grease that you would use on a car. should i pack some grease in there? or just use a little to put the new stuff in?