I just did my clutch, did full friction plate and supposedly a thicker diaphragm, I didn't go with spring because I didn't want to much of a harder lever pull. I do like the full disk better than the half and even tho my clutch was slipping I could hardly tell a difference in thickness, wishing I would have had a micrometer to tell for sure but regardless there's zero slippage. Bike only had 38k at time of replacement, I do like to twist that throttle tho!