My '05 treetrod has to have the top bearings changed. There's only about 6,ooo miles on it. The dealer says that its just one of those things that they should wear out so quickly. They say the Streetrod is a heavy bike. Cost of replacing bearing and labour charge is a bout $500. Don't need this type of charge evry year or so. Has anyone ever heard of this type of problem before. Is it usual to wear out top bearings s quickly? I'm a bit dubious about the dealers answers. Can anybody shine some light on this. Thanks in advance.