Will Royal Purple Max-Cycle cause my clutch to slip?
What oil do you recommend for Harley Davidson®motorcycles?
August 17, 2018I notice a strange odor when running Max-Cycle in my Harley. Is this normal?
August 17, 2018No. Royal Purple Max-Cycle engine oils are rated JASO MA2 in the JASO T903:2011 Clutch Friction Test. MA2 is the highest wet clutch compatibility rating.