Most of them are probably inverted forksI have noticed on some of the Big Dog Mastiffs (and maybe other models) the top triple Tree's are smooth. There is no bolt on top that would screw into the legs. Why is that?
So with that type of triple tree the forks will have caps screwed into the to of the upper.View attachment 62137 Check out the upper Tree's.
AIH did the same on some model years.So Big Dog made different kinds of Tree's?