I recently rebuilt my motor and since I had the cover off I replaced the clutch plates only. The engine is now strong and it seem to run great at first. Now when the engine is cold the clutch will slip bad. It really will not move for a while. In reverse it will hit the rev limiter and craw and then when you put it in first it barely moves. Once hot it runs good but does seem to slip from time to time. Has anyone seen this problem? Should I just do a full rebuild on it? On the 400ex the last clutch plate goes into a different slot. If i did not do that would it have these symptoms? Just trying to figure out what it is before I tear it all apart.