This is my first post on this forum and I'm trying to find out information about the 636's. Well first of my buddy has the f4i and I rode it the other day and i floored it to redline in 1st. and it didn't really impress me that much. I just was wondering what the horsepower differences would be between the 2 bikes and if anybody has rode both of the bikes. Also this would be my first motorcycle but I'm been riding dirtbikes since I was 5 years old.