Well as far as my Speedy goes I am always two up and on trips loaded for two with our luggage. Now I am able to keep it at a constant 165 kilometer/hour = 102. mile/hour (mph) with no real effort. The wind buffering does become an issue but that is just the way it is riding a naked bike. Now I could sure do with a bit more torque that is for sure. Not that the Speedy is inadequate but when I roll on that throttle at a high speed I would enjoy more of a pull.
