Your gas mileage will go to shit on the late model r6 if you're using the power. I had my gas mileage drop by more than half at the track.
That being said, a full tank of gas and a several gall jug on the side will be enough for a typical track day. At least, it has been in my experience.
That being said, a full tank of gas and a several gall jug on the side will be enough for a typical track day. At least, it has been in my experience.