Would those have been my own posts, by any chance?
I generally put my punch lines in #9 red and have for years and years before I became a moderator.
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Now, back to Dozerman and his problems.
Dozerman, you have now done the Serowbot test and you have verified you have a bad vac petcock.
Vac petcocks can do quite a few bad things when they act up -- some very different sorts of bad things.
In that Tech we mentioned
Test your Petcock,.. don't just turn it to Prime.. there are listed a bunch of things that bad vac petcocks can do. The list looks like this:
List of Things That Tell You It May Be Raptor Time1) Your bike stumbles or acts like it is running out of gas when you are going over 55 mph and then when you get to the pump you can't put in 2 full gallons of gasoline.
2) Your bike dies on you and you play bloody hell getting it to start again (you can't get any gas from your sick vac petcock no matter what you do to try to get it to start).
3) When you get a reserve situation and roll the vac petcock toggle to Reserve, the bike continues to stumble for nearly a minute before slowly picking up some power and speed as you struggle to get to a gas station.
4) You get all sorts of abrupt indications your carburetor is dirty or your jetting suddenly went off (and you haven't changed your exhaust system or air filter system). Especially applies if SeaFoam, etc has NO EFFECT on your "carburetor issues" whatsoever when you try it.
5) You smell gasoline either coming from your vac suction line, your airbox or from your oil fill port when you unscrew it (so you can sniff your oil in the sump for the scent of gasoline) because you suspect you have one of the above going on and "it may be Raptor Time".You are complaining of things that are on this list. Rather than chasing mysterious electrical issues first off (when you simply have some other known symptoms of a bad vac sucker)
why don't you get rid of the vac sucker and see if you problems don't decrease greatly, both number of problems and severity of problems.
Put a Raptor on it. This will remove a whole host of problem symptoms.
Once the vac sucker is gone, the murky water is much much lower, and it is a lot easier to see the causes of the remaining issues (if any). This has been our experience with lots of other folks who have been where you are now.