ok, please forgive the noob, guys. I'm riding my 99 and I'm getting a sort of rough shift from neutral to first and then up to second. I'll clutch in, hit the peg and then - clunk! I'm trying to figure out what it is. 8 times outta 10 it'll clunk, but the other two times the shift will be as smooth as a baby's bottom. Once it speeds up, third through six shifts a whole lot smoother than the first two. Any suggestions? Also, bike is about four years old with about 7600 miles on her. The previous owner took awesome care of her, so I'm really puzzled. Please help!