Finally got the clutch apart on my 1000SP engined Loop to see what was causing the disengagement problem from a week ago. I was gob-smacked to see this when I pulled the plates out. The bolt head was apparently rattling around and would sometimes jam one side of the pressure plate & prevent disengagement. Never seen this happen before.
All the bolts were installed new from MG Cycle & torqued with a Snap-On digital torque wrench.
I'll be replacing them all & hoping that they last a bit longer.

