Leaderboard

On the back of your factory tool pouch, there is a 0.7mm feeler gauge. This is for setting the minimum clearance from your brake caliper to the rotor. Read the relevant pages in the FSM for the procedure, it's been a long time since my bike had standard forks and LBS, so I haven't done it in awhile.

The cotter pin is the key. You have to find something small to drive it out. Sorry it broke on ya. Once you get the cotter pin out, the pin with the gold square on it will slide right out, and the Omega shaped bracket can be threaded off the brake rod, allowing you to remove the nut above it. Good luck. Breathe deep and try again tomorrow when you blood pressure is back on scale. Remember, it's an inanimate object, and it is not trying to foil you for kicks. It's just following physics and natural law. You just need to overcome those obstacles and the part will obey you.