On 'tuning' - the main reason I don't run flat out on a good enough road is mostly fear (although I like to call it "mechanical sympathy"). I assume that since the performance improvements relate to improving gas flow, they aren't worth doing unless you are already running on full bore and are not satisfied that you are doing enough damage to your bike! Which is why the cheapest and probably most effective tuning device that I have is a set of ear plugs.
Having said that - encouraging it to run cooler has to be a good thing. I'm leaving well alone. No gas flowing anyway.