Man, slipping clutch with adjustments correct? High miles, abuse, or unknown history? I wouldn't pull the cover without springs and friction discs in my hand.
APE makes some great stuff, but I suggest staying away from their extra-disc clutch pack. The thickness variation of the frictions discs is way off. So after bolting them on you bang into first for a period of time before the high-spots burn off. OEM, and you're good to go on start up.