Back in the 1990's I used to use products called Kick-Ass Gas and Make Her Scream Friction Terminator. At first, I was skeptical. But after my first experiment with them, I was absolutely convinced they really worked! The gas additive made the bike feel like it was on race fuel - definitely better throttle response and power. Due to the oil additive, I could definitely feel that the shifts were smoother and the engine revved quicker. Ran cooler too! Also ran it in my race cars and also BIG difference! Has anyone else here used such products with positive (or negative) results?