Chemicals & Fluids › Twin Primary Oil Image 1 of 1 Twin Primary Oil $20.59 Engineered for use in Big Twin primary drives with wet clutchesProvides outstanding grip for wet clutches to help prevent slippage and chatterFeatures a protective film that reduces wear and extends the life of bearings, chains and sprockets Quantity: Purchase Added! Engineered for use in Big Twin primary drives with wet clutchesProvides outstanding grip for wet clutches to help prevent slippage and chatterFeatures a protective film that reduces wear and extends the life of bearings, chains and sprockets