Bully clutch not disengaging

It seems like a few times over the last two race weekends that one of the bully clutches (2 disc, 6 spring) that I have is failing to disengage when slowing down for a caution or the like. It will eventually disengage, but it seems to be very delayed. The stall speed is set correctly, if not a tad high. In my head, i'm thinking the levers are sticking, but is there anything else that would cause this?
 

OVALTECH1

Premium User
How old are the springs? Are they weak? How big is the air gap?
 
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