Interesting debate how a Vulcan V-twin is different than a HD V-twin

[Brock]

[andyvh1959]

Actually, that picture of a knife/fork connecting rod is where the Vulcan and the Harley engines are the MOST similar, and the most different at the same time. In a Harley, both connecting rods share one crank journal on the same centerline. In a Vulcan 1500, 1600 or 1700, both connecting rods share one crank journal, but the cylinders are offset by the width of the connecting rod big end. In a Vulcan big V-twin the cylinders are not in line to each other like they are in the Harley big V-twin.

But the Vulcan and the Harley do not have the same firing order. In fact they can't just because of the difference in V-angle; 45 degrees for the Harley, and 50 or 52 degrees for the Vulcan and that both the Harley and Vulcans share a common crank pin. A Harley fires at 315 and 405 degrees. A 1500/1600 Vulcan fires at 310 and 410 degrees. The Vulcan 1700, at 52 degrees V-angle fires at 308 and 412 degrees.

https://thunderpress.net/editorial/c...2014/11/15.htm