I just finished the wax molds to investment cast the manifolds in silicon bronze this week. They will be available in 3 configurations. Standard 4 bolt 1-1/2" Linkert 38 mm Mikuni 40 mm Mikuni They will be ready in about a month. I have not even sent the molds to the investment caster yet.
Also working on manifold for the Indian Scout to take standard Indian 3 bolt, 4 bolt 1-1/2" Harley or 38 mm Mikuni.