Originally Posted by Venice Motor Bikes
Yes, you'll have to have the center hole cut out as large as possible! :/
Another method, (if you have access to a welder) is to weld two brake arms together with a 1/2" piece of pipe between them to get the arm to stick out of the sprocket hole further. (it's a little hard to explain without a picture).
Hum, didn't understand quiet well the arm part.
Anyway, you sure a shift kit wouldnt work?