I am in the lose heat and weight category too - but - I have one more concern: keeping the noise down.
I realize that any exhaust I buy will be louder than stock. What I dont understand is how much louder. I know that is subjective but what are we talking ballpark? 10% louder, 25% louder? I am only interested in the slip on - not replacing the pipe as well.
My first aftermarket exhaust (Termi) went on my Ducati S2R 800. I love it but I was surprised by the sheer volume added. I am trying to get an idea of what I may be getting myself into when I change the KTM.