I have ran the snorkel for the first thirty one hundred miles of the bikes(BA)life,about three and a half months now.The point being that I am pretty familiar with the bikes character.Anyway I did a test late tonight with the snork in and with it out.Low rpm,mid rpm,and high speed roll on tests.I found that throttle responce was far softer at all speeds with the snork out.I am pretty sure that it is playing the role of an old fashion velocity tube/stack.I also believe that I may not have seen as much of a change if I still retained the original front sprocket gear.I will probably retest after replacing the original gearing.I think sometimes you have a better chance of seeing where you are by going back to where you have been.That seems to work in life,as well as performance tweaking. Al