I went from a 39 tooth on my '01 S4 to a 37 tooth on the rear. That went easy when I bolted everything back up I noticed this gap, its even all around and appears dirty like its always been there. My question is, should it be there?
(http://farm6.static.flickr.com/5028/5880555615_690071e092.jpg) (https://www.flickr.com/photos/29835492@N02/5880555615/)
P1010231 (https://www.flickr.com/photos/29835492@N02/5880555615/#) by erik.eichhorn (https://www.flickr.com/people/29835492@N02/), on Flickr
Doesn't look odd. You could pull the wheel and clean off all the surfaces - but the mount for the sprocket just drops into the wheel/cush drive - it's not the most precision fit one will ever see.
So those 2 surfaces dont but up against each other?
No, thats fine.
I'll confirm it's fine, I just checked both my M750 (replaced rear sprocket) and my SS900 (OEM sprocket) and both have that gap. Don't worry and go ride.
JM
Thanks!