I'm going to be changing my sprockets and chain on my bike soon. It's an 01' 800a. I believe it has the stock sizes. Right now the thing gets it off the lines but is screaming in 5th on the interstate at 75+. I would like to get it to where it still gets it off the line but ain't screaming so much. I don't do much highway riding. I would say my average is 45 mph. Usually don't do much over 70. Maybe I should keep the stock sizes if I want all that get up and go?