Approx .274 lift and 260 duration. Square lobe design to maximize valve opening time. While meant to use with larger carbs, it actually works very well with smaller carbs by holding the valve open as long as possible with reduced lift to maximize velocity. Honda blocks may need to be clearanced to install. Near stock base Circle. We have used this cam in 196cc motors and made over 20 USEABLE horsepower. Excellent choice.