RE: any one seen this before??
It will work fine if the carb is the proper size. Banshees did come from the factory with two carbs, but the best invention for them ever is the dynoport 2 into 1 intake kit with a single lectron carb. There is no rule that says you have to have a certain number of carbs for every cylinder. The old xr dirtbikes had two carbs for one cylinder etc.