If the clutch was in bad condition like you say the other floaters and plates might be warped which will make it drag and lock early. Also, the spring height is critical. All springs should be adjusted to the same height. Factory starting height is .650″ but check your manual to see where it’s measured because it’s different than a Horstman.
FAA certified jet engine and aircraft technician,
Nicholson Speedway class champion 2001,
Yamaha KT100 Service Center,
41 years karting experience