No worries... You actually don't even have to dyno your bike when you are there, unless you want to. A dyno is a device where you can bring a car or bike and see how much horsepower it makes at the wheel. At the dyno day I believe you get to 2 "pulls" or "runs" to see how much horsepower your bike makes. You don't have to do this if you don't want to. a dyno "tune" is when people take thier car or bike and put it on a dyno and check their horsepower and air fuel ratio. When people start modding cars and bikes with horsepower adders, it changes the AF raitio. IF you buy a proper tuning device, whether it be a piggy back or stand alone tuner, you can then dial in your air fuel ratio, and ultimately run more hp safely! So for 25 bucks you get to see your horsepower, and I think maybe even your air fuel ratio (Not sure on that one)