I've got a 2003 KTM 640 ADV. 20k miles on the clock. It runs like a top except for one thing. When I stop hard (stoppie) or on a steep down hill with the clutch in it dies. It also starts with the choke off when cold. It idles erratically... 1500 to 1800 RPM. My elevation is 6,600 ft. Once, and only once, I noticed a small puddle of gas on the pavement when it was parked. I have only 300 miles of riding time on this bike so my observations have been limited. I'm thinking float height? Worn carb?