This is a 1988 model that I purchased used a month or so ago, but just now getting arounnd to working on it. The bike has not been maintained, and about everything on it is original except the tires. I suspected that the Vboost had been bypassed or not working on this bike, but didn't think about it messing with my carb sync. It has been running rough, I also suspect a vacuum leake, noticed some cracked boots and the engine is slow to return to idle when revved. But I wanted to try the carb sync first, just for practice and to get my first look at these carbs. The idle is rough, but the engine runs mostly good at speed. The 2 carbs on both sides are showing the same pressure, and the sync screws have little affect so obviously the Vboost has been bypassed. How do I sync now. Is it possible to turn the Vboost on to sync, or do I just do the best I can and balance the sides?