a trick i learned from doing 2/3 of these is when putting the clutch fork on, assemble the pin, and put the c-clip on, have the clutch cover and disk seperate from flywheel, move the clutch cover towards the tranny, once the clutch hub is at a close spot yoiu can insert the fork, note the position it needs ot be in of course.. and if you do it right you will feel spring tension, then give when it falls into the hook, and then you wont be able to pull it back out.
make sure the hex hub is line up so the fork doesn't jam.
then of course bolt the CC back onto the flywheel in the correct star pattern