Jmt56tx, I will be running it on a 06 Puma/250XS. I run a super light load (I am talking 2-3 Plano boxes and only the rods I will need), rarely more than 20 gallons of gas (saddles), and I weigh 165. In addition, I live in Oregon where we do not have to deal with the heat and humidity. Also, I am running at just above sea-level. The 27 should provide some interesting results…at least that is what I am hoping for. Neil