I have a 1980 Sachs Suburban. I am new to mopeds so bear with me. It seems to be leaking transmission fluid (pinkish fluid) at the clutch decompressor on the cylinder. There seems to be no gasket on the decompressor according to the manual. Do you think I need a new decompressor? Also what type and how much transmission fluid do I need to use for the moped? Thanks for the help.