V-Twin Primary Case Lubricant Klotzr American V-Twin Synthetic TechniPlater Primary Chain Case Lubricant is custom formulated for the Harley Davidsonr Big Twin Models. Exceeds all warranty requirements for Harley Davidsonr engines. Use of this lubricant provides certified warranty compliance and protection. Penetrates deep into chain rollers to loosen stiff links and extend chain and sprocket life.