[dbarnesid]

This is a fairly long post but I think the details are important.
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I need a little help. I have a 2001 FLHT with Vance &amp\\;\\\\\\;\\\\\\\\\\\\\\; Hines pipes, big sucker, a gear driven cam (not sure which one), and a Mikuni HSR 42. The engine is the stock 88 CI version. I ride mostly at 2400 feet in Boise, Idaho.
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I rejetted the 42 using Joe Minton's formula (and increased the gas mileage from a max of 36 to a max of 43. Not bad.
•17.5 idle jet, leaner than the stock 25 or 20.
•98 needle, leaner than the stock 97.
•50 accelerator pump nozzle way down from the stock 80.
•The main jet is now a 152 not a 160.
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When the weather is hot (over 90)&nbsp\\;\\\\\\;\\\\\\\\\\\\\\;and I have less than 1/2 tank of fuel my bagger is having some pretty serious issues. Namely the bike just acts like it ran out of fuel. I sit at the side of the road and wait... maybe two minutes... maybe five minutes. Then the bike starts up and all is well. Sometimes it stalls again in a few minutes... sometimes it doesn't.
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Yesterday it stalled in the morning before the temperature was too hot but it started up after three minutes. Later in the day when the temp was over 100 degrees it took me fifteen minutes to get her going.
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I talked to a Harley mechanic who said it could be the gas cap or it could be the petcock. So I took her out for a short ride and sure enough... she stalled after ten minutes of riding in yesterday's heat. I opened the gas cap then put it back in. The bike started immediately. Same thing after ten more minutes. This morning I go for a ride to try to duplicate the problem and the bike refuses to stall at all.
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Does anyone have similar experience? Does anyone think the carb mods are the problem? Does anyone have another idea? I'm not thrilled about going on a long tour with this little issue hanging around.
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Thanks for your help!!