what jetting to run around 5000 feet, I have 270 main, 27.5 pilot a/f screw out 1 1/2 I talked to some guys at cascade today and they told me that when you get up this high (I'm from missouri in colorado currently) that you loose compresion. I've never heard this before I have a K&N and t-6s any ideas how to make this puppy run up here? it runs like shit now. Chris from cascade said that at 5000 ft. i'd probly have between 75 and 80 pounds of compresion and under 1000 ft i should have 120 pounds stock.......... thanks for any help i get in advance