I might run my '64 Sportster through Kansas, Oklahoma, New Mexico and Arizona this summer??? I don't know, it's a long ways. 3000+ miles in one week. I like these Raybestos plates (less rotation weight) . . . just keep 'em dry and they work so nice. No slip and No drag. I got this big 23T hoop for the front. I ran this big gear one year, and it worked - but my motor is kinda soft with it. Lugging your motor for long periods is a good way to get it hot . . . and Arizona is already hot ! Ironheads like a little bit o' revs . . .