What oil do you recommend for Harley Davidson®motorcycles?

What do you recommend for the primary case and transmission?
August 17, 2018
Will Royal Purple Max-Cycle cause my clutch to slip?
August 17, 2018
For all Harley Davidson and other air-cooled V-twin motorcycles, we recommend Royal Purple Max-Cycle 20W-50. If the owner’s manual recommends a 10W-40 or 15W-40, Max-Cycle 10W-40 is the best option.
Category: Motorcycle Oils