I got professional instruction for my advance class. Mid-Ohio Track. I myself wouldn't take advice on riding sportbike from those guys. It's more based for the cruiser experience. They really don't know what's best for a sportbike ride. On clutch too, you shouldn't use 4 fingers either on a sportbike. They're light weight and torque can get you in trouble sometime if you aren't holding onto the bar. 2 fingers is the most optimal way to utilize the clutch. Yeah, they need 4 to pull theirs in and don't have to worry about the insane power trying to pull you off your bike.