Yup, already tried that on both counts. I've had both those issues in the past, so I figured it was a vacuum lock. I can't find the variable. It happens full of gas, low on gas, run empty and filled back up with fresh gas, with the petcock on prime, run, or reserve (though reserve hasn't worked for a LONG time, so I wonder if the petcock has given up the ghost), the vacuum caps are on the carbs and I don't see any pinched lines, and the manifold boots were just replaced with new Suzuki parts. Shit's irritating! Thanks for the tips...if I can find the time to get the bike to you I may bring it to you next payday. I don't have time to wrench AND ride, and I'd rather ride while the weather is good!
Originally Posted by
skr00zloose
ok, only because i see this happen alot, take it for a ride with the gas cap OPEN, and see if it still does it. i've seen alot of bikes, especially those that have been painted, get clogged fuel tank vent lines. what happens is the bike will run fine for a while, but with a clogged vent line, the tank gets a vacuum created inside that limits, or shuts off, fuel flow. sometimes the vacuum will release for a second, if the clog isn't too bad, and the bike will run fine for a few until the vacuum gets too great to allow fuel flow again.
if that's not it, check the petcock. is there a "prime" side on the petcock? if so, that should allow fuel to flow no matter what, even with no vacuum at the petcock. try riding on "prime", an see what happens.
that's the easiest stuff to try.