I don't think I would waste the money on a dual carb set up for the Pantera. I know back about 10 years ago, Trinity Racing (the people that build extremely fast yamaha Banshees) was selling a lot of their single carb (constant velocity kit) conversions for the twin cylinder 2 stroke quad engine. They said the twin engine actually was a lot more responsive in the lower rpm's since the single carb keeps flowing air and fuel when it's feeding 2 cylinders. If you run seperate carbs for each cylinder, the carbs airflow is interupted temporarily durin that cylinders cycle causing a pulsing action. Since the single carb is always feeding feeding one cylinder or the other, it should be maintaining the needed flow and crisper throttle response. If I were to do anything with the carb, I would just find a slightly larger one to flow more air/fuel at max rpm, but if you go to big you lose way to much bottom end torque. Clean up the porting a little bit, find some kind of tuned pipe to fit the engine, slightly bigger carb, then tune the clutches and it should really rock. Rockerdude