This is David Bailey's "Bulldog" Virago build. He's put twin Mikuni carbs on, if I'm not mistaken, and popped some velocity stacks on each one. I think Hageman did this too. Does
Yamaha Virago 750 “GTS” by 074 Customs – BikeBound
Yamaha Virago 750 “GTS” by 074 Customs – BikeBound