slipping

So never used a forum before but I'm stumped on this ATV. I recently rebuilt a 250 engine, new clutch pads and centrifugal clutch. I started with just clutch pads and plates. I soaked them in Oreillys 5w-30 regular oil for a day. Put everything together, filled with castrol 10w-40 motorcycle...

Hey everyone, First post. My 2004 trx400fa has been slipping out of gear momentarily when I apply anything more than gentle pressure. It happens in both auto and manual. I can hear a spinning/grinding sound when it does it coming from the control motor roughly. Has anyone had similar issues...