I'm trying to put my sprocket onto the rear wheel of my beach cruiser but it doesn't lay against the sprockets, the hole seems to be slightly too small to fit over it even with the dust cover removed. I'm not sure what to do especially since my tools are very limited (wrench, drill, screwdrivers and not much else) here are some pics of the issue. Any advice? http://i.imgur.com/5FzwUNB.jpg
http://i.imgur.com/Q6gfp3M.jpg
http://i.imgur.com/Q6gfp3M.jpg