I've lost 80 lbs off my Gen1 but I can't corner any faster with it. It's great for extreme low speed and I'm sure it makes some difference for excelleration. The full system was a big improvement but after that, the weight loss mods were not real noticeable. I do have the busa with very few weight loss mods to compare the 14 to and the cornering speed is the same with either bike for me.