Drill bits and clutch fork -- Beginner question

[Don Malling <dmallin@attglobal.net>]

What sort of drill bits do you need to drill into the clutch fork? I 
tried some bits that I used to drilled holes in a "I" beam, but they 
wouldn't touch the clutch fork.

I'm trying to follow Nelson's article on how to remove a broken clutch 
fork pin by drilling a hole in the opposite side of the pin hole and 
tapping it out with a pin punch.

http://www.buckeyetriumphs.org/technical/Clutch/ClutchForkPin/RemovingBrokenClutchForkPins.htm

Don Malling