On the 06-07 10R's what causes the engine restriction? Is it calculated from the speedometer, or the tach or some combination or something else. I know the rpm redline is one restriction but I am talking about the built in restriction to keep the bike from going over 184mph. I am wondering about this because I am going to be changing my sprockets. Should I get a speedo healer as well to counteract any problems from the change in sprockets? I really don't care about accurate speed readings.