So I have a 92 Banshee and i`m restoring it.. I`ve done two oil changes is the last 3 hours of riding. The oil is gray dark and thick.. it looks like a mixture of dirt dust, friction plate material and oil. I took the clutch cover off and sprayed and cleaned with brake parts cleaner. It does not come off easily.. my point is do you have any wisdom to flush my transmission better and clean with a solution? Thanks