you mean the front pulley cover? I used a wiz wheel for the basic hole, and then followed it up with a pencil style die grinder with a very small cutting bit @ about 40,000 rpms hooked up to an air compressor. Its basicly a smaller, more professional version of a dremel. Just take your time and follow the natural lines. I painted the pulley and nut black, and the nut locking plate red.
12SX- dude, I can't even get gas w/o being mobbed lol. Its great!