Yeah, pretty sure I knew that the bike I raced on the track was a 4 cylinder and my commuter bike is a 2. What i'm saying is that ANYTHING that revs to 18k is going to sound a lot meaner than that. ****, a stock 300 sounds meaner at redline. Just my 2 cents....R6 is 4 cylinder and Ninja 250/300 is parallel twin. Do you know?