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Join Date: Jul 2006
Location: Kennett Square, PA
It'd be curious if it were the petcock, only because the fuel feeds are linked to the same mechanism (just the reserve filter sits lower in the tank). This is gonna sound like a dumb question, but...wait, I have two dumb questions, but I ask both because any number of us have "been there, done that.:"
Dumb Question 1: Are you sure you've got the petcock turned to "on" when you're starting the bike? You can build up some fuel in the system and run it for a bit, but it will, predictably, die once that surplus is burned off. Have to ask, just to look for the easy stuff first.
Dumb Question 2: What are you voltage readings on the battery? If they're marginal, your battery will discharge itself and quit while idling. Our bike's charging systems don't kick in until about 2500 rpm - so if you've got a low reading to start with, and you're letting the bike idle at ~1100 rpm, it'll take out that last bit of voltage just sitting there. Take your readings cold, at idle, and at 5K rpm. Should be about 12.8, then slightly down ('cause you're discharging at idle), then back up to around 13-14 v at 5K rpm.