Small engine this, 2 stroke that; I'll add a real world Venture related story.
I bought my 86VR this year with, I know now, 2 year old gas in it and it hadn't been cranked for the two years.
The bike ran pretty good and I had come to thought the roughness was just the V-4 design.
I kept reading on this site how smooth the XVZ's were and how they like to rev.
Over the course of 2,000 miles and three cans of Seafoam, I now know the smoothness of the VR's.
Granted my carbs were not clogged, but I have to give Seaform a thumbs up!!