tire black things

napa auto parts...... i seen them there today

i might have some cores.... out in the shed. i know i have bike tube cores for sure but those are different
 
The cores on Schrader valves are pretty much the same for bikes, cars, refrigerators etc. Here is a removal tool, I would highly recommended getting one
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The black stem core is from a standard tire and the white one is for a compression tester and has a lighter spring. The stem assemblies they sell at the local parts store will work on your quad, just lube them up and force them through.
 
Are they this style?
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They are interchangeable with the internal spring style but I'm not positive about the other way around.
 
I have some spare Blaster stems floating around somewhere, if I find them I'll see if the long cores are compatible. Maybe Ill even throw them in the mail for the guy that doesn't want to go to Napa.
 
Ok I'll keep you posted. I don't make it to your side of the bridge very often but I may be heading out that way to pick up a new trail bike soon. Those stems really are cheap though if you're in a hurry. They were on sale at O'Reillys for a buck or two each last time I needed them, that's why I think I bought some extras.