Clutch problems?

i just purchased second hand px and the first thing i noticed was the clutch, it’s so hard to pull and once you pull from ist and second gear youll here this sound as if the wheel tire was sliding. i pull down the clutch and found out its a 7 springs, and burned linings, so i quickly replaced them with new ones and gave it a try, sadly the problem was not solve. any idea what could be the culprit?? cheers!

by the way which one is better 7 springs or the 8 springs???