Any updates on these twin 120r's yet. Would love to know how those heads worked out and an impression of that t-man cam in this motor? Lookin awesom Jim!
That was my initial thought as well but a friend still has belt drive on a V-rod producing close to 160 Hp and still using the belt. He is as hard on his toys as anyone I know and the belts are holding up.
I was going to suggest getting a side car or trike belt. H-D used to and still may advertise them for heavy duty applications.