ive been working on my jc higgins bike which has a bendix rear hub. single speed coaster from mexico. well the hub itself works fine (great infact) but what im having prolems with is the sprocket. i went to change the bigger bendix stock sprocket for a pretty small sprocket off an un id old hub off a schwinn. the thing is, the sprocket wont fit on, it seems to be the exact same size, it just wont budge. i dont want to break it, so is there anything i can do? maybe just shave a little off the edge of the sprocket? thanks in advanced!!