Routy wrote on 06/13/11 at 07:04:22:

Not necessarily.  Just because the petcock flows enough gas to keep the carb full does not "point straight to a problem with the carburator."  The vacuum line (that the petcock requires) could have a leak in it, causing the bike to run lean to the point of dying out.  A hole in the petcock diaphragm could let gas flow through the vacuum line, causing the bike to run rich to the point of dying out.  A manual petcock eliminates both of these modes of failure as well as the not-flowing-gas problem, and is a worthwhile mod even if it does not cure Z's problem.

Z -- Give you a happy thought -- your carb knows how to work just fine most all of the time.

The fact the "die thing" happens at a use point that coincides with a known vac petcock failure mode and the system recovers exactly like a known vac petcock failure mode is happenstance -- until the Raptor replacement makes it go away.


Routy, what carb failure are you thinking about that comes and goes like a fuel starvation?


Bill, are you "volunteering" for yet another war?



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Z, when we all get nice and bored we sometimes dust off old arguments and try to make the last "whatever" war come out differently.

As the innocent that "asked the question" just don't take any of the ordinance usage that follows to heart as we commonly shoot firearms, blast mortars, shoot ground to air missiles, drop bombs and use flamethrowers and machine guns during these little wars.  

Nobody is going to be shooting towards you (unless you happen to stand behind Bill).


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Sacrilegious statement based on person experience:       eeeek !!    


Running on prime on a vac petcock doesn't always work.   On mine, prime would not instantly refill the filter and the bowl -- I had to pull off the road, cut the ignition off, fiddle between prime and reserve and wait about 3-5 minutes until I got a full filter which at least told me a full bowl was down there at the bottom.   Gas trickled back into the system with the stock vac unit (it jest doesn't work very well when it gets old and sick).   And yes, I had cleaned my filter screens and my cap didn't vapor lock the tank 'cause I'd open it to see if it would help things along any.

With a Raptor, you only see a lack of fuel in the filter when you run low on gas and have to switch to Reserve -- and then it gushes back into the filter in 5-7 seconds to a full bowl and filter.    You don't have to stop the bike, it will recover from the stumble state just that fast.


Bill, are you saying you have never worked on anything you had ever owned and it always ran fine until you went and got another one?
  Well, that's consistent anyway.



NOTE: A second annual petcock war is declared by willing participants

Babyhog, you were always nice so I was nice to you

(until we caught you sneakin' around the bushes outside our camp fire up on the Dragon Run taking pictures of what we were up to so as to document all our dubious shenanigans)

Are you coming up this year?

I am still attempting to get off, but not any luck so far.

Quote:
Routy, what carb failure are you thinking about that comes and goes like a fuel starvation?
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I suspect there is a chunk a junk in the bowl of her carb that is getting in front of a jet, causing it to die. As soon as it dies, the suction stops, letting the chunk float away,.......but,.. only till it happens again. Don't even think that this has not happened to me several times in my many years. Sometimes it happens in the tank, and sometimes it happens in the carb bowl.

Bill, a serious question.


Why won't Sea Foam fix a vac petcock diaphragm?  

The Sea Foam is in contact with the diaphragm for the entire time -- why doesn't the magic sparkles fixate the bad/ugly and HEAL it?

Bill, will Seafoam dissolve floating/sinking silicone?


I guess this all assumes Mr. Z didn't drop the bowl to clean out all the crap after putting in the paper filter rig to keep the crap from ever reaching the bowl again.   Mebbe he will stop and tell us so we can refine our assumptions a bit.


Them ugly gol durn ASSumptions, they wind up killing me every durn time.    


Seems like I would learn.      


Jest ask Babyhog ... she's done caught me ASSuming before.

here is where i got mine - works great installed in less than 20 minutes from drain the tank to running again.

http://www.cheapcycleparts.com/1-all-products?q=5LP-24500-01-00