Petcock Leaking - Harley Davidson Forums: Harley Davidson Motorcycle Forum
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post #1 of 16 (permalink) Old 03-19-2017, 12:30 PM Thread Starter
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Petcock Leaking

I got a petcock leaking around the fuel valve. It's not much, but over time it could be a hazard and I rather just fix it now. To be more specific, it's leaking around the cover on the turn lever itself. You know the cover that has "Res" "On" "Off" stamped on it. I don't know if I'm missing an O-ring or what. I'd like to try and rebuild it before buying a new one, it is vacuum operated off a '96 Sporty 1200. Any suggestions?
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post #2 of 16 (permalink) Old 03-19-2017, 12:35 PM
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I believe the parts for that petcock are obsolete ! They used to be available at the dealers because there was a recall on them but they're probably all gone by now ! Wouldn't hurt to check. You could also find out at the MoCo website by plugging in your bike's VIN. It was a safety recall so the MoCo has to honor them forever !

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post #3 of 16 (permalink) Old 03-19-2017, 01:03 PM Thread Starter
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That figures. How much do you know about running a petcock that's not vacuum operated? I've done some research, some say it's okay, others say it'll impact the performance. I'm probably better off getting a new petcock is why I'm asking
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post #4 of 16 (permalink) Old 03-19-2017, 01:12 PM
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The vacuum petcock was ONLY a safety feature, no performance enhancement at all. You can replace with any non vacuum petcock but it should be turned off every time you shut the bike off to prevent fuel over flow at the carb.

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post #5 of 16 (permalink) Old 03-19-2017, 01:15 PM
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Do they give their reasoning for that statement?
Have eliminated the vacuum petcock on both my 99 Evo. Replaced with a Pingel.
Put the eliminator kit on my Friends 02 TC.
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post #6 of 16 (permalink) Old 03-19-2017, 01:26 PM Thread Starter
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I figure once you get into the routine of shutting it off before you kill the bike, it'll become instinct. I'd like to get rid of the vacuum operation, how do I go about getting rid of the hoses and the switch?
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post #7 of 16 (permalink) Old 03-19-2017, 03:06 PM
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Mine started dripping a little a few years ago.

Just tightened up the 2 screws on the cover and it hasn't leaked since!


Doesn't take much, just a 1/8 turn or so.

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post #8 of 16 (permalink) Old 03-19-2017, 03:45 PM
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I've eliminated vacuum petcock on two old carburetor bikes in the past, one of them if I left petcock on it wouldn't get pass the carb, the other one however would get into cyl/motor which sucksss happened more than once before I learned ..LOL really bad if I parked it with a full tank.
Only thing I can figure is condition of needle/seat in float bowl or ??? I did find a old off the shelf replacement whatta you call new old stock, and it failed after no time.
It really wasn't a problem remembering to shut it off/on, cept the time I let a ole friend ride one and forgot to tell him about it and few blocks away it quit running..he knew what was up and continued onward !!

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post #9 of 16 (permalink) Old 03-19-2017, 04:34 PM Thread Starter
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Kainam; tried that already. Even made a gasket out of a gasket sheet. Something inside just isn't sealing like it should.

I seen somewhere about vacuum caps? Anyone know about this?
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post #10 of 16 (permalink) Old 03-19-2017, 05:04 PM
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they have these on ebay Lh or Rh or Straight out the bottom for about 36.00 bucks and free shipping 1985 thru 2006 Hope this help ., They never had vacuum operated petcocks in till the 90's. I think and most people got buy and just shut them off when they stopped or fixed there carb to prevent it from running gas .

Replacement Chrome Fuel Petcock for Harley-Davidson 1975-2006 (LH Outlet ) | eBay


Old school isn't all bad

You can get some of these caps to cap off where it connects to carb or Manifold

Get these from your Local auto parts Store or Ebay if you can wait for them
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