The last few pictures, of the green Vincent HRD, that is a replica of a pre-war Vincent Series A Rapide. Dan Smith from Vancouver made something like over 90% of the parts. He makes his own patterns for the castings, has the castings made, and does all the machining himself. Even some of the parts on a Vincent that were originally bought in, like the Amal carbs, Dan made his own. This is the same Dan Smith that was the crew chief one year for the Vincent liner, when a group from Canada leased Max Lambky's liner.
Vincent twins have the two connecting rods side by side on the big end. That gives the uneven firing intervals. The Series A twins have more space between the flywheels, so Dan redesigned his flywheels, and made them with offset crank pins. Now the firing interval is even, and it sounds more like a vertical twin than a v-twin.
