The piece that I'm pretty feeble with is getting a circlip removed...I know there have been times it's taken more than a minute just to do that!
Yeah, I've done it enough times, but have to gather my bearings and/or retrain myself every time. I remember my earlier/younger days of losing one in the grass...on a Saturday after the shops closed...planning to ride Sunday and trying to "make" one... Who would've known that just any old wire kinda in the shape of a circlip wouldn't work...
BTW, never will rebuild a 4 stroke top end. Well, can't say never...just unlikely. At least not mine and/or one I am responsible for it things don't go well. Then again, not true, just not one with an F in the model #. Anything with a XR, and R, or and X in it I might... Might I say...