Originally Posted by Ulyses
Thanks Dave! I have been checking my chain every day and I measure the play with a ruler. I thought that surely that wasn't the problem until I took off my luggage this evening, went for a ride, and found that it wasn't making the noise anymore. So, I guess that the chain is looser without the luggage, meaning that my chain was too tight to begin with! Thanks!
I don't know why the chain would make noise only when downshifting into second... but anyway...
Forget the ruler, Set the chain to barely slack when the suspension is compressed so that the centerlines of the front sprocket, swingarm pivot, and rear sprocket centerline form a straight line.