(front) drive sprocket removal

Hey Guys,
I would like to remove the small drive sprocket and place a washer behind it. Is this possible and if so, what is holding the sprocket on other than the visible nut? My chain is barely rubbing the tire as it comes off the bottom of the front sprocket.

By the way, I have gained alot of info from this forum and really appreciate all the post. Latest idea I got from the postings was to use a skate board wheel as a chain tensioner. I tried it and it works great. I used the original tensioner mount and just replaced the original roller assembly with a 5/16 bolt some spacers and the skate board wheel. It did take a little time to make sure it tracked right both forward and back. Adjustment was all in the vertical position of the mount which determines level of the wheel.

Now if I can just get that spacer behind the sprocket I will be a happy biker.

Did you get the "mystery tool" that comes with most kits? That's the sprocket puller.

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If it ain't broke, and you mess with it long enough, it will be.

Some other options for you might be to slightly dish the rim so the tire is moved slightly more to the peddle side, or add additional spacers on the big sprocket to move it out a little. Just something to consider. Good luck!!

Thanks guys!
I did get the mystery tool and did not know what it was for but will certainly try it out!

Re shimming with the big sprocket, I have already turned the big sprocket around to provide extra clearance there and think problem now lies with front sprocket since top of chain as it comes off the big sprocket clears tire, but the bottom rubs as it comes off of the small sprocket. Wheel has been alighned and balanced and spins true. Thanks Again!