ummmm.....to each his own.  

Great thing is, all the info to correct it is right here. So choose whichever side of the fence you wish to fall on.  

I bought a new stock petcock half a year ago. It runs flawless. Would it run faster with a raptor petcock?

No, not while your $80 new stock petcock is practically new anyway.

But, given another 5-10 years (once the vac diaphragm gets stiff or splits again) then yeah, I think a 5-10 year old Raptor would still be doing excellently (the same exact same way a new Raptor would be doing) while the $80 spent on the replacement stock petcock would be acting about like the original one did, giving your similar troubles to those which caused you to replace it in the first place.

Stock vac petcocks are unreliable -- you are tossing good money after bad performance in the long term.


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I think they said the bike was a BMW, but the kids with the camera phone are idiots who very well might not know a squid from a beemer.

Well, are you just kiddin around or are you's just a bunch of ignorant  kids ?

The reality of it all is that the diaphram in that petcock is no different than any other diaphram material, whether it be in a carb or a fuel pump, or any other component that uses diaphram material,....such as accelerator pumps in some automotive carbs, and therefore are not going to give any more trouble.....any sooner than any other of those fore mentioned components, and therefore will last anywhere between  10 and 20-30 yrs.
Fact is in the first 10-15 yrs, most all the problems is from the vacuum hose deteriorating, not from a ruptured diaphram. So quit you're dam whinin and snibblin about the petcock, when in reality it is no more troublesome than any fuel hose on these bikes. And when the vacuum hose get to the age where it mite split ends, go buy a pc of fuel hose that will last for 20 yrs !

Along w/ mine I know of 3 other bikes from '04 to '07 that have never touched the vac line or much less the petcock, all are still original and working fine.
Just amazes how any type of bad running  problem out there right away gets blamed on the petcock, and most those times it turns out to not be !
14 million of these bikes out there, some near 30 yrs old, and you kids snibble and whine about a petcock that fails now and then on a 20 yr old bike.
Ok ok, I'm just kiddin around on a sunday evening too

I change the vaccum hose once a year, no matter what. The end near the cylinder head gets a lot of heat and starts cracking after a while. I buy 3/16" fuel hose at O'Reilly's and it's about a dollar per foot. Cheap, easy preventative maintenance.

FWIW I am a convert. Just need to get a little money in the bank. It seems like I put most of my motorcycle money in the gas tank of my car or truck. But what someone pointed out on here is that my stock petcock is probably not flowing the full amount of gas it could be. Sometimes I need slapping, but common sense usually brings me around.