Every now and then I hear and feel a strange rattle in the front end of my 620dark and am beginning to think it could be that my headset is a little loose. i've applied the front brake and tried to move the bike back and forth while on it to see if there's any movement but I'm having a hard time deciding if that's it because the front shock moves as well. Is there a better way to tell if the front end is a little loose? Has anyone had this problem? My bike is a 2003 620 with about 4000mi so it's pretty new. Thanks guys.