Had a strange thing happen after racing at the Grange March 28. I let a few people ride the bike to see what they thought of it and the last one to ride it was one of my youngest son's, Bryson.
He pulled up after a short ride up and down the pit row and the clutch did not disengage. Wasn't really concerned as the races were over and it was time to pack up and go home. This past Saturday I finally got around to checking it out to see what the problem was as it was still stuck in gear so to speak. Pulled the clutch and couldn't really see anything wrong with it and then started disassembling it.
The 6 levers were moving freely as if it was disengaged but the unit was still locked up somehow. Turns out the thrust bearing had self imploded causing the clutch to lock up. This is a cheap easy fix as I just took one of a spare clutch I had lying around......it's $5.10 for a new one.
The reason for the failure was I left a 1/8" spacer off the shaft that put the primary chain out of line and caused too much side load on the bearing.
Here are a couple pics of the radial needle thrust bearing that failed: