u can trace a line like 1/16" at atime around th hole and gently grind it away with a dremel or similar tool or even a hard file just be sure to keep i t even
Remove the dust cover from the coaster hub and see if it will fit first. It is easier to modify the dust cover than it is to correctly modify the sprocket.
Remove the dust cover from the coaster hub and see if it will fit first. It is easier to modify the dust cover than it is to correctly modify the sprocket.