Vac vs Gravity Petcocks
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Tourer
Joined: Mar 2012
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From: Lithia, FL
Vac vs Gravity Petcocks
I searched but didn't find anything, so please help me out here. I've got a '99 Sporty that's got some mods and I have a '94 peanut tank for it. Do I need the vacuum actuated petcock or can I just use an old school gravity petcock? I know the '99 had an OEM vacuum petcock, but not sure why? Any help and advice would be greatly appreciated
HDF Community Team
Joined: Dec 2011
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From: San Diego, CA
Should work fine, gravity has been around a lot longer than vacuum. Just make sure you cap off the open vacuum port so the VOES still functions properly. Just have to remember to turn it on and off, pretty simple for most humans.
John
John
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Road Warrior
Joined: Apr 2011
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From: North Carolina
The vac only opens the petcock for fuel flow. It has nothing to with delivery in a sense.
If you don't have suction on the valve port it won't open and allow fuel to gravity feed to the carb
If you don't have suction on the valve port it won't open and allow fuel to gravity feed to the carb
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Tourer
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From: Lithia, FL
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misfitJason
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Feb 16, 2011 07:34 AM
