I just did an oil change, and since then the top of the rear jug is chatering. I used oem filter, and oem oil. I filled with new oil while the bike was on the jack, so it was leaval. I filed to the top of the highest line, the second line on the dip stick. I checked while filling by just dipping the stick not screewing it in. This is what I was told was right. I have 1,440 miles on the bike. Is this chatter from my oil change? shoud Ibring it to the dealer. I got the bike in august 2004. Its a 2003 1800 Retro. Thanks in advance.