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Message: [QUOTE="Rhodester, post: 1056406, member: 42241"] You are too lean on the main jet. Try a 152 or a 155. I'd stick my piston with that main jet at your elevation. As a matter of fact, that may be why it won't idle when it gets "hot". I wouldn't consider a 148 unless I was over 6000' on a warm day. I'd look for a vacuum leak or chipped reeds for any additional idle problems (intake boot cracks, head and base gasket seal, etc.). Going up to a 45 on your pilot might be worth a try. You should start with the air screw 1 1/2 out and adjust from there. Make sure that someone didn't over tighten the air screw and ruin it. [/QUOTE]