After 35 years in a shed I got the xr75 running...but clutch not engaging so I assume plates are glued shut. Will pull the case and check it out..was wondering what guys use on the gasket (if anything) when replacing the gasket and cover for sealant? I Am hoping it's just the plates that are stuck as the lever pulls but nothing happens...real let down after hearing it run for the first time in 35 years. I rocked it back and forth trying to free the plates but nothing..any other thoughts? I'll know more once I pull the cover...thanks!