you clutch shouldnt be slipping at all, thats why u bought the new clutch... it should actually be very stiff, and it hasnt broken in yet, id almost wonder if ur clutch disc is tilted. I would pull it apart and check out ur install before u have 2 buy a 2nd brand new clutch When u pull it apart, make sure u used the clutch alignment tool, and that u have the disc in the right way.