Castrol Power RS V-Twin 4T Motorcycle Oil - 20W50 - 1L. 12892Fully synthetic 4 stroke motorcycle oil designed for modern V Twin engines, transmissions and primary chaincases Engineered and tested for performance in Harley Davidson motorcycles Provides excellent protection against thermal and viscosity breakdown under high temperatures generated by air cooled V Twin engines Delivers proven wet clutch performance allowing for smooth operation and protection Suitable for all Japanese and North American 4 stroke