I have only been riding for 3 years but have done about 25000km. My street triple with just a flyscreen has smooth windflow up to about 140kph. I fitted a triumph visor to improve wind protection but found It only protected my chest which had not been much of a problem. It greatly increased wind noise and buffeting around my helmet which made cruising worse. I rode a few other bikes with small screens eg ninja 1000 and found the same problems. I also rode 2000km on a triumph thunderbird LT with its full screen ( the shorter one) and found its screen very effective and cruising was very comfortable. So is it no screen or full screen and the rest is rubbish?