just moved from sea level to about 4500 feet above see level. I already have a #170 jet in my carb...i finally got it to start after turning the fuel/air mixture screw a total of 5 1/2 turns out(it was running good at 2 turns out). gonna get a new jet and here's my question.....what size should i go up to? i'm trying to avoid buying a handful of different jets. and my next question is do you think i'll have to change my pilot?