I was trying to follow this EASY post, for an '03.
http://www.thumpertalk.com/topic/700337 ... on-crf150/
Yes I took off the clutch side cover (easy), but the clutch cage appears to NEED to come off, along with the smaller round cover that blocks the clutch cage from coming off. The clutch basket nut seems to be on tight, and the other cover appears to need a special 4 tab external socket.
This is a HOT project I needed to finish quickly, so it looks like a trip to the Honda shop for me today.
What year are you working on? Hopefully and '03 style, so it will be easy.
Good luck and HOPE someone else will post some confirmations on what to do.
MJ