Got me there
Not holding throttle WFO on downgrades? If you are pulling in your clutch lever and engine is not disengaging,then I'd check to see if the inner pressure is coming off! The other thing that I can think of is the springs are bound , sometimes people put sparkplug washers in there. I usually run Honda fibers, I don't think any others are close. I've heard people retro fitting them in other makes. If the metal plates are warped ,then there's your problem. I've had some that are blue and still be flat, sometimes, where its warped it measures thinner.