Reboot came with a pingle petcock but I don't know why. The mods are minimal (drilled, not removed, airbox, etc.). However, it's very pretty, the lever action is silky smooth and it hasn't leaked a drop. I have had issues with my stock petcock lever sticking on Bollox, but that's usually after it's been sitting for a while and it loosens up with use. I bought a pingle for my spare neon blue Speedmaster tank and after making a gasket out of innertube and using Seal-All, it still leaks. I think it's the teflon tape--I didn't use enough, but I haven't gotten around to trying to fix it.
The verdict? Not really worth it if you're on a budget and your stock petcock still works. If you've bored and stroked your motor and you're running flatside carbs and drag racing, maybe, just MAYBE you might need it. If you need a petcock and you're on a budget, get a used stock one either on ebay or from someone on this site.
EDIT: Bikebandit.com lists the stock petcock assembly new at $97. If I had to have a new petcock I'd probably go with pingle for the extra few bucks, but realize it might take some fiddling around to keep it from leaking.
EDIT2: Just realize that you basically have to permanently glue the Pingle mounting block to your tank to get it to seal, so there is basically no turning back once you go Pingle. Basically.
